Nitrogen Metabolism in Plant Cell Suspension Cultures | Zendy

Josef Behrend | Zendy; R. I. Máteles | Zendy

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Nitrogen Metabolism in Plant Cell Suspension Cultures

Author(s) -

Josef Behrend,

R. I. Máteles

Publication year - 1975

Publication title -

plant physiology

Language(s) - Uncategorized

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.56.5.584

Subject(s) - amino acid , nicotiana tabacum , nitrate reductase , nitrogen assimilation , biochemistry , amino acid synthesis , arginine , biology , daucus carota , metabolism , nitrate , ammonium , urea , lycopersicon , chemistry , botany , enzyme , lysine , gene , ecology , organic chemistry

Certain amino acids inhibit growth of tobacco (Nicotiana tabacum L. var. xanthi), tomato (Lycopersicon esculentum) carrot (Daucus carota), and soybean (Glycerine max L. co. Mandarin) cell cultures when nitrate or urea are the nitrogen sources but not when ammonia is the nitrogen source. These amino acids also inhibit development of nitrate reductase activity (NADH:nitrate oxidoreductase EC 1.6.6.1) in tobacco and tomato cultures. Threonine, the most inhibitory amino acid, also inhibits nitrate uptake in tobacco cells. Arginine, and some other amino acids, abolish the inhibition effects caused by other amino acids. We suggest that amino acids inhibit assimilation of intracellular ammonium into amino acids in cells grown on nitrate or urea.

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