Interrelationships between microorganisms and plants in by Vlastimil Vancura

By Vlastimil Vancura

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Extra resources for Interrelationships between microorganisms and plants in soil: proceedings of an international symposium, Liblice, Czechoslovakia, June 22-27, 1987

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1 are growth c u r v e s f o r rhizobium, s t r a i n 164, and g. japonicum, s t r a i n 646, under a n a e r o b i c c o n d i t i o n s i n the p r e s e n c e and absence of n i t r a t e . I t can be s e e n t h a t a d d i t i o n of n i t r a t e invigor a t e s a n a e r o b i c growth by a f a c t o r of 3 to 4 , which can a t t a i n t h e r a t e of growth by means of oxygen r e s p i r a t i o n . Even b e f o r e t h e end of t h e i r loq-qrowth phase b o t h s t r a i n s were c a p a b l e of reducing a c e t y l e n e to e t h y l e n e , and t h e l e v e l of n i t r o g e n a s e a c t i v i t y i n t h e presence of n i t r a t e s was more t h a n 10 t i m e s a s l a r g e a s t h a t i n i t s absence (Tab.

PHa meliloti 35 425a -R. N20, e m o l . m g -1 d r y biomass d r y b ioma 8s -R. -’ . trifolii 345 348a 13 346 a I n i t i a l pH of t h e medium w a s 6 . , FACTORS ON Chernova N . I . I n s t i t u t e of Microbiology, USSR Academy of S c i e n c e s , 1 1 7 812 Moscow, USSR ABSTRACT 28 s t r a i n s of Bradyrhizobium japonicum and 10 s t r a i n s of Rhizobium meliloti were t e s t e d as e f f e c t i v e n i t r o g e n - f i x i n g i n o c u l a n t s d u r i n g 1979-1986. The e f f e c t of i n o c u l a t i o n was e s t i m a t e d by g r a i n and g r e e n mass y i e l d , n o d u l e mass, number and n i t r o g e n - f i x i n g ( a c e t y l e n e - r e d u c i n g ) a c t i v i t y (ARA).

The ratio of the role of plant and microbial components in the effectivity of bean-rhizobial symbiosis. (In Russian). Mikrobiologiya 54: 857-859, 1985. L. I n s t i t u t e of Microbiology, USSR Academy of Sciences, 117 812 Moscow, USSR ABSTRACT F i x a t i o n of n i t r o g e n by Rhizobium i n pure c u l t u r e s i n t h e presence of n i t r a t e under a n a e r o b i c c o n d i t i o n s has been e s t a b l i s h e d . Both slowly-growing and fast-growing r h i z o b i a were i n v e s t i g a t e d .

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