Physiological Responses of Soybean Plants Grown in a Nitrogen-Free or Energy Limited Environment | Zendy

Yuxian Zhu | Zendy; Karel R. Schubert | Zendy; Daniel H. Kohl | Zendy

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Physiological Responses of Soybean Plants Grown in a Nitrogen-Free or Energy Limited Environment

Author(s) -

Yuxian Zhu,

Karel R. Schubert,

Daniel H. Kohl

Publication year - 1991

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.96.1.305

Subject(s) - nitrogenase , acetylene , glycine , girdling , nitrogen , volume (thermodynamics) , seedling , nitrogen fixation , chemistry , phloem , biology , horticulture , botany , biochemistry , physics , organic chemistry , amino acid , quantum mechanics

Soybean (Glycine max [L.] Merr.) seedlings grown in the absence of combined N and in an Ar:O(2) (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.

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