ACCELERATION OF WATER UPTAKE AND GERMINATION OF SUGAR BEET SEEDBALLS BY SURFACE COATINGS OF HYDROPHILIC COLLOIDS AND NUTRIENTS BY TAKAO MIYAMOTO AN ABSTRACT S u b m itte d to th e C o lle g e o f A g r ic u ltu r e M ichigan S t a t e U n iv e r s ity o f A g r ic u ltu r e and A p p lied S c ie n c e i n p a r t i a l f u l f i l l m e n t o f t h e re q u ire m e n ts f o r th e d eg ree o f DOCTOR OF PHILOSOPHY D epartm ent o f Farm Crops 1959 TAKAO MIYAMOTO 1 The em ergence o f a s u g a r b e e t s e e d lin g i s slow i n d ry s o i l due t o r e t a r d e d w a te r a b s o r p tio n by th e se e d . I n o r d e r t o im prove w a te r u p ta k e , th e se e d b a l l was t r e a t e d w ith h y d r o p h ilic c o l l o i d s . A th in f i l m o f h y d r o p h ilic c o l l o i d on t h e s u rf a c e o f th e se e d b a l l ab so rb ed w a te r e a s i l y from t h e su rro u n d in g s o i l and th e seed to o k up w a te r from th e m o iste n e d f i l m . The w a te r a b s o rp tio n by th e t r e a t e d seed from sand c o n ta in in g 0 .3 5 ^ w a te r was ab o u t 50% g r e a t e r th a n th e con­ t r o l 24 h r s . a f t e r p l a n t i n g . The em ergence o f s e e d lin g s from t r e a t e d se e d was a ls o f a s t e r th a n th e c o n t r o l . The a l g i n ,tK e lte x w, i n a 0 .7 5 $ w a te r s o l u t i o n , was u sed t o m o iste n th e seed b a l l s i n most cases. The t r e a t e d se e d b a l l s were s to r e d i n th e l a b o r a t o r y and t e s t e d one y e a r l a t e r . The speed o f w a te r u p ta k e and em ergence o f t r e a t e d se ed was s t i l l g r e a t e r th a n t h a t o f th e c o n tr o l. T h is in d i c a t e s t h a t th e tre a te d seed s a re p e r f e c tly s to ra b le . T r e a tin g s e e d w ith th e h y d r o p h ilic c o l l o i d speeded up germ in­ a t i o n , b u t th e e f f e c t o f th e tr e a tm e n t on s e e d lin g grow th amounted to o n ly a 6% i n c r e a s e i n w eight o f i n d iv id u a l s e e d lin g s a t 5 days a f t e r p la n tin g , i n o r d e r t o u a s te n th e developm ent o f th e s e e d lin g , H oagiand1s n u t r i e n t s o lu tio n f i v e tim e s o r d in a ry c o n c e n tr a tio n was m ixed w ith 0,75% K e lte x . The f il m o f K e lte x a c c e le r a te d w a te r ab­ s o r p tio n , and a t th e same tim e , t h e n u t r i e n t s o lu tio n f u rn is h e d a d d i­ t i o n a l n u t r i e n t s t o t h e grow ing s e e d lin g . The a v e ra g e w eig h t o f s e e d lin g s from t h e seed b a l l s t r e a t e d w ith th e m ix tu re o f hydro­ p h i l i c c o l l o i d and n u t r i e n t s o lu t i o n was about 20% more th a n t h a t from th e seed b a l l s t r e a t e d w ith t h e c o l l o i d a lo n e . TAKAO MIYAMOTO 2 C alcium n i t r a t e was e lim in a te d from th e n u t r i e n t s o lu tio n b e­ ca u se t h i s s a l t te n d e d t o c o a g u la te th e c o l l o i d and was in c o n v e n ie n t i n th e t r e a t m e n t. The e f f e c t o f t h i s e lim in a tio n on th e developm ent o f s e e d lin g s w as found t o be s t a t i s t i c a l l y n o n - s i g n i f i c a n t . F u r th e r im provem ent o f th e developm ent o f s e e d lin g s was accomp­ l i s h e d by ad d in g o r g a n ic n u t r i e n t s to th e K e lte x s o lu t i o n c o n ta in in g m in e r a l n u t r i e n t s . 1% s u c ro se and 0 .0 5 $ a s p a ra g in so added gave f u r ­ t h e r w eig h t in c r e a s e o f s e e d lin g s o f 9$ and 16% i n two d i f f e r e n t te s ts . ACCELERATION OF WATER UPTAKE AND GERMINATION OF SUGARBEET SEEDBALLS BY SURFACE COATINGS OF HYDROPHILIC COLLOIDS AND NUTRIENTS BY TAKAO HIYAMDTO A THESIS S u b m itted t o th e C o lleg e o f A g r ic u ltu r e M ichigan S t a t e U n iv e r s ity o f A g r ic u ltu r e and A p p lied S c ie n c e i n p a r t i a l f u l f i l l m e n t o f t h e re q u ire m e n ts f o r th e d e g re e o f DOCTOR OF PHILOSOPHY D ep artm ent o f Farm Crops 1959 Approved by ProQuest Number: 10008548 All rights reserved INFORMATION TO ALL USERS The quality of this reproduction is dependent upon the quality of the copy submitted. In the unlikely event that the author did not send a complete manuscript and there are missing pages, these will be noted. Also, if material had to be removed, a note will indicate the deletion. ProQuest 10008548 Published by ProQuest LLC (2016). Copyright of the Dissertation is held by the Author. All rights reserved. This work is protected against unauthorized copying under Title 17, United States Code Microform Edition © ProQuest LLC. ProQuest LLC. 789 East Eisenhower Parkway P.O. Box 1346 Ann Arbor, Ml 4 8 1 0 6 -1 3 4 6 Acknowl edgment The a u th o r e x p r e s s e s h i s s in c e r e a p p r e c ia tio n t o D r. S . T. D ex ter f o r h i s g u id an ce th ro u g h o u t th e c o u rs e o f t h i s stu d y and t o th e F . & M. B eet S u g ar A s s o c ia tio n f o r t h e r e s e a r c h a s s i s t a n t s h i p and t h e r e s u l t s o f g e rm in a tio n t e s t s i n th e f ie ld * TABLE OF CONTENTS Page I n t r o d u c t i o n ................................... 1 Review o f L i t e r a t u r e 3 .......................................................... M a t e r i a l s ............................... E x p e rim e n ta l P ro c ed u re . U ................................... 6 R e s u l t s ...................... I. 7 A c c e le r a tio n o f w ater a b s o r p tio n by means o f seed tr e a tm e n t w ith h y d r o p h ilic c o l l o i d s ..............................................7 I I* A c c e le r a tio n o f s e e d lin g developm ent by means o f seed tre a tm e n t w ith a m ix tu re o f h y d r o p h ilic c o l lo id and in o rg a n ic n u t r i e n t s .......................... III. . . . * 2 1 A c c e le r a tio n o f s e e d lin g developm ent by means o f seed tr e a tm e n t w ith a m ix tu re o f h y d r o p h ilic c o ll o id , m in e ra l n u t r i e n t s , o rg a n ic n u t r i e n t s D is c u s s io n Summary and enzymes . . . 27 ............................................. ................................................ . . . . 35 ..................................................... L i t e r a t u r e C ite d • • • . . . . • • • • . • • • • • • • • • • • 3 7 .................. . 38 LIST OF TABLES Table 1. Page P e r c e n t w eig h t i n c r e a s e , due to w a te r u p ta k e from sand a t v a r io u s m o is tu re c o n te n ts , o f s e e d s b u r ie d i n sand . . . . . . 2# S P e r c e n t w eig h t I n c r e a s e due t o w a te r a b s o r p tio n by seed s t r e a t e d w ith s o lu tio n s o f s e v e r a l c o n c e n tr a tio n s o f K e lte x from sand a t v a r io u s m o istu re c o n te n ts 3* . ..................................... 10 P e rc e n t w e ig h t I n c r e a s e due to w a te r a b s o rp tio n from sand w ith 0 .3 5 $ w a te r by monogerm and w hole m u ltig erm s u g a r b e e t s e e d s t r e a t e d w ith K e lte x and n u t r i e n t s o l u t i o n ............................15 U* P e r c e n t w e ig h t in c r e a s e due to w a te r a b s o r p tio n by monogerm and whole s u g a r b e e t seed s t r e a t e d w ith 0 .7 5 $ K e lte x and 0 .1 $ "Tween Twenty" from sand w ith 0 .3 5 $ w a te r 2J+ h r s . a f t e r p l a n t i n g ....................................................................... 5. 16 P e r c e n t w eig h t in c r e a s e due to w a te r u p ta k e from atm o sp h eres a t v a r io u s r e l a t i v e h u m id itie s a f t e r e q u ilib riu m was reach ed 17 6. Em ergence c a p a c ity o f d e c o r tic a te d s u g a r b e e t seed a y e a r a f t e r b e in g t r e a t e d w ith 0 .7 5 $ K e lte x . T e ste d i n s o i l w ith 9 .3 $ w a t e r ...................... . 7. G erm ination i n t h e f i e l d 8. P e rc e n t w e ig h t in c r e a s e due to w a te r a b s o rp tio n by v a r io u s ....................................... 18 19 s e e d s t r e a t e d w ith 0 .7 5 $ K e lte x s o lu t i o n from sand w ith 0 .3 5 $ w a t e r .............................................................. 9. . . 2 0 P e r c e n t w eig h t in c r e a s e due t o w a te r a b s o r p tio n by su g ar b e e t s e e d s t r e a t e d w ith n u t r i e n t s o lu tio n o f s e v e r a l con­ c e n t r a t i o n s from sand w ith 0 .3 5 $ w a t e r .................................................21 LIST OF TABLES (Continued) Table 10. Page P e r c e n t w e ig h t in c r e a s e i n 24- h r s . due t o w a te r a b s o rp tio n by su g a r b e e t s e e d s t r e a t e d w ith m ix tu re s o f h y d r o p h ilic c o l l o i d s and n u t r i e n t s o lu tio n s o f s e v e r a l c o n c e n tr a tio n s from sand w ith 0*35$ w a t e r ........................................ 11. 22 G e rm in atio n o f su g a r b e e t w hole m u ltig erm seed t r e a t e d w ith K e lte x and n u t r i e n t s o lu t i o n i n th e s o i l w ith 1 1 .5 $ w a te r 12. ............................... 23 G erm in atio n o f monogerm su g ar b e e t se e d s t r e a t e d w ith K e lte x and n u t r i e n t s o lu t io n i n th e s o i l w ith 1 0 .9 $ w a t e r ................................................................................................................25 13. G erm in atio n o f sp in ach s e e d s t r e a t e d w ith K e lte x and n u t r i e n t s o l u t i o n i n th e s o i l w ith 9 .8 $ w a te r H . ............................ 26 P e rc e n t w e ig h t in c r e a s e o f w hole su g a r b e e t s e e d , t r e a t e d w ith h y d r o p h ilic c o l l o i d and o rg a n ic n u t r i e n t s , due to w a te r a b s o r p tio n from sand w ith 0 .3 5 $ w a t e r ....................................28 15. Emergence o f s e e d lin g s from monogerm s u g a r b e e t seed s t r e a t e d w ith K e lte x , x5 n u t r i e n t s o lu tio n and o rg a n ic n u t r i e n t s i n s o i l w ith 11% w a t e r ........................................................................... 16. 30 Emergence o f s e e d lin g s from monogerm su g a r b e e t s e e d s t r e a t e d w ith K e lte x , x5 n u t r i e n t s o lu t i o n , su c ro se and v a r io u s amount o f a s p a r a g in . The s o i l c o n ta in e d 1 1 .5 $ w a t e r ............................................ 17. 33 A pproxim ate amount o f m a t e r ia ls added to su g a r b e e t seed b a l l s i n th e b e s t t r e a t m e n t ..................................................... 34- LIST OF FIGURES F ig u re 1* G erm ination i n sand o f seed t r e a t e d w ith 0 .7 5 $ K e lte x w ith v a r io u s w a te r c o n te n t ........................... 2. Page • • • • • • • • • Emergence o f s e e d lin g s from whole s u g a rb e e t seed t r e a t e d w ith 0 .7 5 $ K e lte x i n th e s o i l 5 days a f t e r p l a n t i n g 3. 12 . . . 13 S u g a rb e e t s e e d lin g s from monogerm seed s t r e a t e d w ith 0 ,7 5 $ K e lte x , x5 n u t r i e n t s o lu tio n - Ca 1$ s u c ro s e and 0.4.5% a s p a r a g i n ................................................................. 32 1 I n tr o d u c ti o n S u g ar b e e t s e e d # r e q u i r e a w e tte r s o i l f o r g e rm in a tio n , and s e e d ­ l i n g em ergence i s slo w er th a n t h a t o f many o t h e r k in d s o f s e e d s . In many c a s e s , a f t e r p ro lo n g e d s to r a g e i n semi-damp s o i l , th e seed w i l l mold and r o t . Y et, th e m e c h a n iz a tio n o f s p rin g work w ith t h i s crop r e q u i r e s a prom pt and u n ifo rm em ergence o f s e e d lin g s * Numerous i n v e s t i g a t o r s ( 6 ,3 ,1 1 ) have r e p o r t e d t h a t th e rem oval o f i n h i b i t o r y s u b s ta n c e s from th e seed c o a t prom otes s e e d lin g emer­ gence* However, i t seems t o be n e c e s s a ry t o in v e n t o th e r ways o f acce­ l e r a t i o n o f em ergence i f th e 3 o i l i s r a t h e r d ry . T h is t h e s i s d e a ls w ith t h e r e s u l t s o f a stu d y in w hich t h e a u th o r h a s fo u n d ways t o p ro ­ m ote s e e d lin g em ergence i n s o i l s w ith low m o istu re c o n te n ts * S e v e r a l p o s s i b l e ways w ere c o n s id e re d t o im prove s e e d lin g em er­ gence. These w ere: ( a ) s tim u la te enzymes (b ) im prove m in e ra l n u t r i ­ t i o n (c ) im prove o rg a n ic n u t r i t i o n (d ) overcome dorm ancies (e ) ta k e up w a te r f a s t e r ( f ) a c c e l e r a t e e lo n g a tio n . In t h i s s tu d y , th e a c c e l e r a t i o n o f w a te r u p ta k e was t e s t e d f i r s t b eca u se i t seemed th e m ost im p o rta n t f a c t o r f o r r a p id em ergence. The a c c e l e r a t i o n o f w a te r u p ta k e and g e rm in a tio n w ere accom plished by seed tr e a tm e n t w ith h y d r o p h ilic c o l l o i d s , to g iv e a t h i n s u rf a c e l a y e r o f c o llo id . I n t h e n e x t s tu d y , th e a c c e l e r a t i o n o f grow th o f s e e d lin g s by a d d itio n o f m in e ra l n u t r i e n t s was a tte m p te d . The fo llo w in g d iag ram o f a pyram id i l l u s t r a t e s t h e ap p ro ach u sed t o im prove th e emergence and v ig o r o f s u g a r b e e t s e e d lin g s . # In t h i s p a p e r t h e te rm s ’’seed.'1 and " s e e d b a ll" a r e u sed alm o st i n t e r c h an g e a b ly . hormones etc * ? Improve o r g a n ic n u tritio n Improve m in e ra l n u tritio n A c c e le r a te u p tak e o f w a te r 3 Review o f L i t e r a t u r e The r e l a t i o n s h i p betw een s u g a r b e e t seed g e rm in a tio n and s o i l m o is tu r e h a s b e e n shown by many i n v e s t i g a t o r s , Doneen and M a c G illi- v ra y (3 ) showed t h e m o is tu re r e q u ire m e n ts o f v a r io u s se e d s f o r g e r ­ m in a tio n u s in g a Y elo f i n e sandy loam s o i l a t d i f f e r e n t m o is tu re con­ te n ts , They fo u n d t h a t m ost v e g e ta b le seed s gave good g e rm in a tio n , i n t h e s o i l w ith more th a n 9$ w a te r , b u t b e e ts r e q u i r e d more th a n 11$ w a te r f o r good g e rm in a tio n . H u n ter and E ric k so n (5 ) r e p o r te d , a t 25°C, t h a t a s o i l sh o u ld have a m o is tu r e te n s io n o f n o t more th a n 1 2 ,5 a tm o sp h eres f o r c o m k e r n e ls t o g erm in a te ; 7 ,9 atm o sp h eres f o r r i c e k e r n e l s ; 6 ,6 atm o sp h eres f o r soybeans; and 3*5 atm qpheres f o r segm ented s u g a r b e e t s e e d s. H u n ter and D e x te r (4 ) showed t h a t s u g a r b e e t seed s d id n o t g e m in a te i n r e l a t i v e h u m id itie s o f 100$ and m ust, b e i n c o n ta c t w ith some so u rce o f f r e e w ater* D ir e c t c o n ta c t o f r e l a t i v e l y d i l u t e s o lu tio n s o f m in e ra l s a l t s t o s u g a r b e e t see d h a s b een re c o g n is e d t o slow down g e rm in a tio n , S y n d e r (10) r e p o r te d t h a t banding 100 pounds p e r a c r e ( 2 8 - in c h row s) o f 1 0 -1 0 -1 0 f e r t i l i z e r i n c o n ta c t w ith t h e seed a t 14*7$ s o i l m ois­ t u r e r e s u l t e d i n emergences o f l e s s and 50$ o f t h e p o t e n t i a l s ta n d i n tw e n ty days* He showed t h a t th e em ergence was s u b s t a n t i a l l y d e la y e d when se e d s w ere p la c e d o n e - h a lf in c h above th e band o f f e r t i l i z e r a s com pared w ith see d s p la c e d one in c h to th e s id e and o n e - h a lf in c h above t h e f e r t i l i z e r . However, he d id n o t t e s t th e e f f e c t o f a v e ry s m a ll amount o f f e r t i l i z e r i n c o n ta c t w ith t h e seed on em ergence* u The e f f e c t o f s u g a r on th e g row th o f th e se e d embryo was s tu d ie d b y some i n v e s t i g a t o r s . Ginko b i l o b a . B u la rd (2 ) s tu d ie d th e embryo c u l t u r e o f He r e p o r te d t h a t norm al grow th o f t h e e x c is e d embryo w as o b ta in e d o n ly when t h e c o ty le d o n s w ere i n c o n ta c t w ith th e nu­ t r i e n t m edia and t h a t th e p re s e n c e o f s u g a r i n th e m edia was i n d i s ­ p e n s a b le t o g ro w th . f i n u s la m b e r tia a a . Brown and G if f o r d (1 ) c u ltu r e d em bryos o f The b a s ic medium was a m o d ified K n o p 's s o lu t io n t o w hich 2$ s u c ro s e and 1% a g a r w ere a d d ed . Embryos grown w ith th e r a d i c l e embedded i n t h e s u c ro s e medium e x h ib ite d im m ediate grow th o f a l l o rg a n s ; th e r o o t s , how ever, grew o n ly 1 t o 2 cm i n l e n g th d u rin g t h e f i r s t two to t h r e e weeks and t h e r e a f t e r became c o m p le te ly i n h i ­ b ite d . I n c o n t r a s t , when th e c o ty le d o n s w ere p la c e d i n t h e s u c ro s e medium, le a v in g t h e r a d i c l e end f r e e I n a i r , grow th o f t h e r o o t was r a p i d , r e a c h in g 5 t o 8 cm i n le n g th b e fo re d y in g o r d e s ic c a tio n * T here r e s u l t s m ight be i n t e r p r e t e d to mean t h a t a m ix tu re o f min­ e r a l s a l t s and s u g a r i s a b so rb e d by th e c o ty le d o n and a c c e l e r a t e , e s ­ p e c i a l l y , t h e g row th o f r o o t s . M a te r ia ls S u g ar b e e t w hole seed : U. S . — 401, L ot No. 808. S ugar b e e t d e c o r t i c a t e d s e e d s ; U. S . — 401, L ot No. 80 8 , S iz e 7 /6 4 .-1 0 /6 4 ” . S ugar b e e t monogerm s e e d s : S iz e 8/ 64- 9/ 64"• A ll s u g a r b e e t s e e d s w ere f u r n is h e d by th e F & M B ee t S u g ar A s s o c ia tio n . 5 V e g e ta b le s e e d s w ere f a m i s h e d by th e H o r t i c u l t u r e D ep artm en t. F ie ld c r o p s s e e d s o th e r th a n s u g a r b e e ts w ere f u r n is h e d by t h e Farm C rops D e p a rtm e n t. K e lte x , K e lc o g e l, K e lc o lo id L V an d K e lg in L V w ere f u r n is h e d by t h e K elco Company. K e lte x i s th e t r a d e name o f a lg in ( 7 ) . C arb o p o l 934- was f u r n is h e d by B. F . G oodrich C hem ical Company. 6 E x p e rim e n ta l P ro c e d u re The s u r f a c e s o f a i r d ry s e e d s w ere dampened by im m ersion i n d i l u t e " s o lu tio n s " o f th e v a r io u s c o l l o i d a l m a t e r ia ls o r th e mix­ t u r e s o f c o l l o i d a l m a tte r and n u tr ie n ts * one t h i r d i t s w eig h t o f s o l u t i o n . The seed ab so rb ed a b o u t The t r e a t e d se e d s w ere r e d r i e d f o r s e v e rs !, days b e fo re u s e . I n th e w a te r a b s o rp tio n t e s t s * w eighed l o t s o f t r e a t e d and un­ t r e a t e d s e e d s w ere p la c e d in sand dampened to s p e c i f i c m o istu re con­ te n ts . A f te r v a r io u s i n t e r v a l s th e seed s were removed from th e sand by s c re e n in g , and rew eighed t o d e te rm in e th e u p ta k e o f w ater* F o r u s e i n t h e f i e l d , 10 pounds o f segmented se e d w ere t r e a t e d by t h e a u th o r w ith a 0 . 75% s o lu tio n o f K e lte x . A nother 25 pounds o f s e e d s w ere so t r e a t e d by th e r e s e a r c h s t a f f o f th e F & H S u g ar B eet A s s o c ia tio n . T hese 35 pounds o f seed w ere d i s t r i b u t e d t o th e r e ­ s e a r c h s t a f f s o f th e M ichigan S ugar Company, th e M onitor S u g ar Com­ p a n y , t h e Canada and Dominion S ugar Company, and th e F & M. The seed was p la n te d i n many r e p l i c a t e d p l o t s th ro u g h o u t th e s u g a r b e e t grow­ i n g a r e a i n M ichigan and O n ta rio . R e s u lts o f c o u n ts t o e s t a b l i s h sp eed o f em ergence w ere fu rn is h e d by t h i s g ro u p . I n t h e la b o r a to r y em ergence t e s t s , s e e d s w ere p la n te d i n a s c re e n e d B ro o k sto n c la y loam ta k e n from th e plow l a y e r o f a f i e l d on t h e U n i v e r s i t y farm . I n o r d e r t o make th e s o i l m o is tu re c o n te n t u n i­ fo rm , an a p p r o p r ia te amount o f w a te r was added t o 4*5 kg o f th e s o i l , and t h e t h e s o i l and w a te r w ere w e ll mixed and s c re e n e d . The u n ifo r m ly m o iste n ed s o i l was p u t i n t o a m e ta l t r a y o f 4 x 8 x 12" dim ensions* 7 F o u r o r f i v e p l o t s w ere l a i d o u t i n th e t r a y and tw e n ty s e e d s w ere p l a n t e d i n each p l o t a t 1 / 2 in c h d e p th . The t r a y was c o v e re d w ith a s h e e t o f p l a s t i c t o p re v e n t r a p i d e v a p o ra tio n o f w a te r . A f te r em er­ gen ce to o k p l a c e , numbers and w e ig h ts o f s e e d lin g s w ere d e te rm in e d . S e e d lin g s w ere dug u p , t h e s o i l was removed from t h e r o o ts and t h e w e ig h t o f s e e d lin g s was d e te rm in e d . T e s ts w ere r e p l i c a t e d f i v e o r s i x tim e s , and t h e r e s u l t s w ere s t a t i s t i c a l l y a n a ly z e d . R e s u lts I. A c c e le r a tio n o f w a te r a b s o rp tio n by means o f seed tr e a tm e n t w ith h y d r o p h ilic c o l l o i d s . A. W ater a b s o rp tio n b y s u g a r b e e t w hole s e e d s t r e a t e d w ith v a r io u s h y d r o p h ilic c o l l o i d s from dampened s a n d . Numerous w eighed sam ples o f 10 s e e d s were p la c e d i n 300 m l. E rlenm eyer f l a s k s w ith 300 gms. o f m o isten ed q u a r tz sa n d . w ere d u p lic a te d and th e av erag e was c a lc u la te d . T e sts 3 TABLE 1 P e r c e n t w eig h t in c r e a s e , due t o w a te r u p ta k e from sand a t v a r io u s m ois­ t u r e c o n t e n t s , o f se e d s b u r ie d i n san d . Sand c o n ta in in g 0 .3 5 $ w a te r T re a tm e n ts / h o u rs 24 0 .7 5 $ a g a r 56 72 76 1 .5 $ g e l a t i n 60 70 0 .7 5 $ g e l a t i n 60 C o n tro l 41 48 $ $ 96 72 85 110 93 94 97 71 30 78 96 53 66 75 33 72 69 to 96 48 103 $ 130 1 .5 $ g e l a t i n 66 77 37 92 0 .7 5 $ g e l a t i n 74 83 92 119 C o n tro l 50 66 70 87 24 0 .7 5 $ a g a r $ $ /0 S Sand c o n ta in in g 0 .5 0 $ w a te r T r e a tm e n ts / S o u rs 120 $ Sand c o n ta in in g 0 .3 5 $ w a te r T reatm en t s /S o u rs 24 43 1$ Ke l g in LV $ '71 94 1$ K e lc o g e l 69 97 0 .3 3 $ C arb o p o l 63 76 1$ K e lc o lo id 60 89 1$ K e lte x 85 102 C o n tro l 47 67 $ 9 T a b le 1 shows t h a t t h e h y d r o p h ilic c o l l o i d tre a tm e n t a c c e l e r a t e d w a te r a b s o r p tio n from san d w ith 0 ,3 5 and 0*50$ w ater* I n san d w ith 0*35$ w a te r , a r a t h e r d r y c o n d itio n , t h e tr e a tm e n t w ith 1$ K e lte x gave t h e b e s t r e s u lt* B* The b e s t c o n c e n tr a tio n o f K e lte x f o r th e tre a tm e n t o f s u g a r b eet s e e d b a lls . Whole s e e d s w ere t r e a t e d w ith v a r io u s c o n c e n tr a tio n s o f K e lte x s o lu tio n . W ater a b s o r p tio n was t e s t e d i n th e same way a s i n th e p r e ­ v io u s experim ent* 10 TABLE 2 P e r c e n t w e ig h t i n c r e a s e due to w a te r a b s o r p tio n by seed s t r e a t e d w ith s o l u t i o n s o f s e v e r a l c o n c e n tr a tio n s o f K e lte x from sand a t v a r io u s m o is tu r e c o n te n ts* Sand w ith 0 .3 5 $ w a te r Cone, ol,, / tim e s o lu tio n / h r s . 24 0 . 25$ 64 0 .5 0 $ . 4S % $ % 96 72 % 73 107 127 66 76 106 121 0 .7 5 $ 74 80 116 125 1.00% 73 S9 98 112 C o n tro l 56 65 88 no Sand w ith 1 .0 $ w a te r Cone• o f .Aim© s o lu t i o n f h r s . 0 .5 5 3 1 % $ % 8 $ 14 % 48 24 1o > % 0 .2 5 $ 12 17 29 38 47 61 70 91 0 . 50$ 14 16 32 39 49 67 81 101 0 .7 5 $ 17 18 31 39 58 75 86 105 1.00% 14 H CM 40 57 70 86 108 C o n tro l n 14 22 34 42 52 63 85 Sand w ith 1 .5 $ w a te r Cone, of, /tim e so lu tio n s f h r s . 2 1 0 .5 $ $ 3 $ 8 $ 14 $ % 0*25$ 17 23 29 36 62 61 0 .5 0 $ IS 25 31 42 65 77 0 .7 5 $ 19 30 42 46 68 82 1 .0 0 $ 27 33 51 54 77 89 C o n tro l 12 16 23 30 42 50 11 T ab le 2 (C ontinued) Sand w ith 3 .O5S w a te r Cone* o f i tim e s o lu tio n /V v rs. 0 .5 1 2 3 % % 8 0 . 25$ % 23 38 46 53 70 0 .5 0 $ 34 32 74 53 86 86 0 .7 5 $ 29 50 60 56 80 97 1 .0 0 $ 33 46 63 76 85 105 C o n tro l 15 33 32 32 52 66 % % 1481 % T a b le 2 shows t h a t t h e 0*75% and 1*0$ K e lte x tr e a tm e n t gave g r e a t e r w a te r a b s o r p tio n th a n low er c o n c e n tr a tio n s from sand w ith v a r i o u s m o is tu re c o n t e n t s . D if fe r e n c e s i n w a te r u p ta k e betw een 0 ,7 5 and 1*0$ K e lte x w ere s l i g h t . F ig . 1 shows g e rm in a tio n o f th e t r e a t e d s u g a r b e e t seed a t 5 days a f t e r p l a n t i n g i n sand w ith 0.35* 0*40 and 0 .5 0 $ w a te r . 12 O • %JtQ *# ft J& ft* • b» €* £ «.» $ * ❖ ^ f f n + + 0 0 # • *& C * 5 0 , ai< €■ ft # ft 81 # * * % H ». * fl> * ft * & ftp n \ >4 * '♦ > j Wj l T jS * ) * ' \ ; # _ J « « • * R •« - 46 « f ®? f t ' _ j» ' ~ ■ i t- ^ * « f t irVATiifi ^ * f t ^ • m S' € & € 0.40>o £3 fp 11 ft M S, 0 ftp # 1 m k 0 m f t 1$ s u c ro s e and 0 .0 5 $ a s p a r a g in were c a lc u la t e d . The w eig h t o f a s i n g l e s e e d b a ll was assumed to be 0 .0 2 gm f o r w hole m u ltig erm seed an d 0 .0 1 gm f o r monogerm. The p e rc e n ta g e based on th e d ry w eig h t o f s e e d i s g iv e n i n th e l a s t column. The r e s u l t s a re g iv e n i n T able 17. TABLE 17 A pproxim ate am ount o f m a te r ia ls added to su g ar b e e t seed b a l l s i n th e b e s t tr e a tm e n t. M ate ria ls/A m o u n t For Monogerm. p e r seed F or M ultigerm p e r seed KN03 0 .6 7 x 10” ^gm 1 .3 4 x 10” ^gm 0 .0 6 7 KC1 0 .5 0 1 .0 0 0.050 0 .1 3 0 .2 6 0.013 0 .1 1 0 .2 2 0 .0 1 1 NH^ h2 po4 0 .3 8 0 .7 6 0.038 Mg SO^ .7H20 0 .6 0 1.2 0 0 .0 6 0 K e lte x 2 .4 7 4 .9 5 0 .2 4 7 S u cro se 3 .3 0 6 .6 0 0.330 A sp a ra g in 0 .1 7 0 .3 3 0 .0 1 7 T o ta l S . 33 1 6 .6 6 0 .833 (NH^) NO^ P e rc e n ta g e o f w eig h t o f seed 35 D is c u s s io n From t h e f i g u r e s g i v e n , i t is e v id e n t t h a t s o i l w a te r u p ta k e w as g r e a t l y a c c e l e r a t e d b y c o a t i n g s u g a r b e e t s e e d b a l l s w it h h y d r o p h i l i c c o llo id , e v e n t h o u g h u p t a k e o f w a t e r v a p o r fro m t h e a i r w as n o t* P re­ s u m a b ly t h e w e t t i n g and s w e l l i n g o f t h e c o l l o i d on t h e s u r f a c e o f t h e s e e d e n a b le s a r a p id t r a n s f e r o f w a te r t o t h e se e d i t s e l f . lik e ly , It se em s a s w e l l , t h a t t h i s w e t t i n g o f t h e s u r f a c e e s t a b l i s h e s m ore and b e t t e r c o n n e c t i o n s b e tw e e n t h e w a t e r f i l m s i n t h e s o i l and t h e s e e d . I n t h e c a s e o f sa n d t h a t I s d e f i n i t e l y to o d r y f o r r a p i d g e r m i n a t io n , w i t h o u t t r e a t m e n t , t h e u p ta k e o f w a t e r b y t r e a t e d s e e d w as en ou gh m ore t o p r o m o te g e r m i n a t io n . In f i e l d tr ia ls , e v e n when t h e t r e a t e d and u n t r e a t e d s e e d s w ere p l a n t e d i n damp s o i l , some a c c e l e r a t i o n o f g e r m in a t io n d u e t o t r e a t m e n t a p p e a r e d i n m o st c a s e s . ’When t h e s o i l w a s d r y and g e r m i n a t io n w as s lo w t h e a c c e l e r a t i o n o f g e r m in a t io n b y t r e a t m e n t w as n o t a b l e . M r. F r a k e s r e p o r t e d t h a t n o o t h e r s e e d s e m e r g e d . w h ic h h e g a v e f i g u r e s i n In one t r i a l In th e t r i a l f o r T a b le Uy g e r m in a t io n o f t r e a t e d s e e d w as v e r y p r o m p t f o l l o w i n g a l i g h t r a i n on r a t h e r d r y s o i l , w h i l e u n t r e a t e d s e e d resp o n d ed v e r y s lo w ly . it From t h e l a b o r a t o r y f i g u r e s and f i e l d tr ia ls , s e e m s c l e a r t h a t s u c h t r e a t m e n t n o t o n l y p r o m o te s u p t a k e o f w a t e r fr o m r a t h e r d r y s o i l , b u t a l s o k e e p s t h e s e e d s m o is t l o n g e r d u r in g t h e p e r i o d when t h e s o i l I s d r y in g o u t , t h u s e n a b l i n g g e r m in a t io n t o p r o ­ c e e d u n d e r minimum m o i s t u r e c o n d i t i o n s * The p o s s i b i l i t y i s w id e ly t o s u g g e s t e d t h a t t h i s p r i n c i p l e may b e a p p l i e d o t h e r s e e d s i n w h ic h s o i l m o is t u r e u p t a k e and r e t e n t i o n i s a p r o b le m , and p a r t i c u l a r l y t o s m a ll s e e d s t h a t m u st b e p l a n t e d s h a l l o w . 36 A lth o u g h t r e a t m e n t w i t h h y d r o p n i l i c c o l l o i d a c c e l e r a t e d w a t e r u p t a k e and g e r m i n a t io n , i t w a s n o t fo u n d t o a c c e l e r a t e t h e g r o w th o f s e e d li n g s a p p r e c ia b ly . T h is l e d t h e a u t h o r t o make an a s s u m p tio n t h a t t h e d e f i c i e n c y o f n u t r i t i o n i n t h e s e e d w as t h e l i m i t i n g f a c t o r f o r t h e f a s t e r g r o w th o f s e e d l i n g s fr o m s e e d t r e a t e d w i t h t h e h y d ro ­ p h ilic c o llo id o n ly . When s e e d s w e r e t r e a t e d w it h a m ix t u r e o f h y d r o ­ p h ilic c o l l o i d and m i n e r a l n u t r i e n t s o l u t i o n t h e g r o w th o f s e e d l i n g s , an d e s p e c i a l l y t h e d e v e lo p m e n t o f r o o t s , w as f a s t e r t h a n t h a t o f s e e d l i n g s fr o m t h e s e e d t r e a t e d w i t h h y d r o p h i l i c c o l l o i d o n l y . It a p p e a r s t h a t c e r t a i n in o r g a n ic m a t e r ia ls in th e n u t r ie n t s o lu t io n w ere t h e l i m i t i n g f a c t o r s o f t h e g r o w th th o u g h i t i s n o t y e t d e c id e d w h ic h e le m e n t i s m o s t n e e d e d . When s e e d s w e r e t r e a t e d w i t h m in e r a l n u t r i e n t s o n l y , t h e g e r m i n a t io n w as r e t a r d e d . P e r h a p s a h i g h e r o s m o t ic p r e s s u r e c a u s e d by t h e a d d i t i o n o f m in e r a l n u t r i e n t s w as t h e r e a s o n f o r t h i s s lo w dow n. H o w ev er, t h e a d d i t i o n o f h y d r o p h i l i c c o l l o i d t o m in e r a l n u tr ie n t s o lu tio n seem ed t o r e d u c e t h e e f f e c t o f o s m o t i c p r e s s u r e and h a s t e n s e e d g e r m i n a t io n . F u r t h e r a d d i t i o n o f o r g a n ic m a t e r i a l s t o t h e t r e a t m e n t show ed m ore im p r o v e m e n t i n t h e g r o w th o f s e e d l i n g s . th e P e r h a p s , t im e i s r e q u ir e d f o r s e e d en zym es t o w ork and t h e o r g a n i c f o o d s u p p ly i n t h e s u g a r b e e t se e d i s lim ite d e a r ly in th e l i f e o f th e s e e d lin g . T h erefo re th e e x te r ­ n a l s u p p ly o f o r g a n i c s u b s t a n c e s m ig h t p r o m o te t h e g r o w th o f t h e s e e d ­ lin g d ir e c tly . The e f f e c t o f h o r m o n e s e t c . on t h e f u r t h e r im p rovem en t o f t h e g r o w th o f s e e d l i n g s w as n o t c o m p le te d i n t h i s s t u d y , a lt h o u g h i n p r e ­ lim in a r y t r i a l s g i b b e r e l li n o r 6 - ( s u b s t it u t e d - p u r in e s (9 ) a lo n e o r i n c o m b in a t io n w e r e n o t f o u n d t o b e h e l p f u l . 37 Summary S u rfa c e c o a tin g s o f seed w ith h y d r o p h ilic c o l l o i d s were shown t o be e f f e c t i v e i n a c c e l e r a t i n g w a te r u p ta k e from san d , and i n a c c e l e r a t ­ in g em ergence o f s e e d lin g s from s o i l under o r d in a r y p la n tin g c o n d itio n s i n th e f i e l d * A d d itio n o f in o r g a n ic and o rg a n ic n u t r i e n t s to th e hydro­ p h i l i c c o a tin g prom oted grow th o f s e e d lin g s i n th e s o i l . 38 L i t e r a t u r e C ite d 1 . B roun, C. L. and G if f o r d , E. M .: The r e l a t i o n o f th e c o ty le d o n s t o r o o t d evelopm ent o f p in e embryos groun i n v i t r o . P la n t p h y s. 33: 5 7 -6 4 . 1953* 2 . B u la rd , C .s C u ltu re a s e p tiq u e d*embryons de Ginkgo b i lo b a t R o le d e s c o ty le d o n s dans l'a b s o r p tio n du s u c re e t l a c rd ss a n c e de l a t i g e . Compt. r e n d , a c a d . s c i . P a r i s 235: 739-741. 1952. 3* Doneen, L. D. and Mac G i l l i v r a y , J . H .: G erm ination (Emergence) o f v e g e ta b le s e e d a s a f f e c t e d by d i f f e r e n t s o i l m o is tu re c o n d itio n s . P l a n t B hys. 13 : 5 2 4 -5 2 9 . 1943. 4* H u n ter, J , R. and D e x te r, S. T . : Some s e e d - s o il m o is tu re s tu d ie s w ith s u g a r b e e t s . P ro c . Amer. S o c. Sug. B eet Tech. pp 270-274. 1950. 5 . H u n te r, J . R. and E ric k s o n , A. E . : R e la tio n o f se e d g e rm in a tio n t o s o i l m o is tu re t e n s i o n . Agron. J o u r . 44: 107-109. 1952. 6 . M akino, I . and Miyamoto, T .: On th e grow th i n h i b i t i n g su b sta n c e i n g e rm in a tin g s p in a c h s e e d s . Ja p a n e se J o u r . B reed. 4 : 1 5 3 -1 6 0 . 1954* 7 . M autner, H. G .: 192.. 1954. The c h e m istry o f brown a lg a e . Econ. B o t. 8 : 174- 8# Miyamoto, T .: The g e rm in a tio n i n h i b i t o r i n s u g a r b e e t s e e d b a lls . Q u a rt. B u ll. M ich ig an A gr. Exp. S t a t . 39: 513-523. 1957. 9 . S k in n e r, C. G. and S h iv e , W. s S y n e r g is tic e f f e c t o f g i b b e r e l li n and 6 - ( s u b s t i t u t e d ) - p u r i n e s on g e rm in a tio n o f l e t t u c e se e d . A rch. Biochem . & G io p h y s. 7 4 : 233-285. 1958. 1 0 . Sjjy&er, F . W.: E f f e c t o f m o is tu r e and f e r t i l i z a t i o n on emergence o f s u g a r b e e t s e e d l in g s . Amer. S o c. Sug. B eet T ech. 9 : 450—456. 1957. 1 1 . S to u t, M. and Tolman, B .t F a c to r s a f f e c tin g t h e g e rm in a tio n o f s u g a r b e e t and o t h e r s e e d s , w ith s p e c i a l r e f e r e n c e t o th e to x ic e f f e c t s o f ammonia. J o u r . A gr. R es. 63 : 637-713. 1941.