Physiological responses of soybean plants grown in a nitrogen-free or energy limited environment

Soybean (Glycine max [L.] Merr.) seedlings grown in the absence of combined N and in an Ar:O2 (79:21, volume/volume) atmosphere had greater seedling and nodule mass, threefold higher acetylene reducing activity per gram fresh weight nodules, no observable increase in nitrogenase Fe-protein, and a hi...

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Bibliographic Details
Published in:Plant physiology (Bethesda) 1991-05, Vol.96 (1), p.305-309
Main Authors: Zhu, Y. (Washington University, St. Louis, MO), Schubert, K.R, Kohl, D.H
Format: Article
Language:English
Subjects:
ACETILENO
ACETYLENE
ACIDE SUCCINIQUE
ACIDO SUCCINICO
ACTIVIDAD ENZIMATICA
ACTIVITE ENZYMATIQUE
Alkynes
AZOTE
Bacteroids
BESOIN NUTRITIONNEL
Biological and medical sciences
BRADYRHIZOBIUM
Communications
Environmental and Stress Physiology
Fundamental and applied biological sciences. Psychology
GLYCINE MAX
INCISION ANNULAIRE
INCISION ANULAR
METABOLISME
METABOLISMO
NECESIDADES DE NUTRIENTES
Nitrogen fixation
NITROGENASA
NITROGENASE
NITROGENO
NODOSITE RACINAIRE
Nodules
NUDOSIDADES RADICULARES
Parasitism and symbiosis
Phloem
Plant cells
Plant physiology and development
Plant roots
Plants
PROLINA
PROLINE
REDUCCION
REDUCTION
Seedlings
Soybeans
Symbiosis
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Summary:Soybean (Glycine max [L.] Merr.) seedlings grown in the absence of combined N and in an Ar:O2 (79:21, volume/volume) atmosphere had greater seedling and nodule mass, threefold higher acetylene reducing activity per gram fresh weight nodules, no observable increase in nitrogenase Fe-protein, and a higher energy charge than did control plants. A sharp fall in acetylene reducing activity and energy charge accompanying stem-girdling was prevented by exogenous succinate, a result consistent with a path from the roots to the nodule other than via the phloem
ISSN:0032-0889
1532-2548
DOI:10.1104/pp.96.1.305