期刊
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
卷 302, 期 2, 页码 427-434出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/S0006-291X(03)00194-3
关键词
weak sinusoidally varying magnetic fields; N-15 NMR analysis; alanine accumulation under stress; abiotic stress; universal stress signal; free radicals; vitamin C; Spirodela oligorrhiza (Lemnaceae) (Duckweed); nitrogen assimilation; eliolated plants
N-15 NMR analysis reveals alanine production in Duckweed plants exposed to low intensity sinusoidally varying magnetic fields (SVMF) at 60 and 100 Hz, and fed by N-15-labeled ammonium chloride. Alanine does not accumulate in the absence of SVMF. Addition of vitamin C, a radical scavenger, reduced alanine production by 82%, indicating the roll of free radicals in the process. Alanine accumulation in plants and animals in response to exposure to a variety of stress conditions, including SVMF, is a general phenomenon. It is proposed that alanine is a universal first stress signal expressed by cells. (C) 2003 Elsevier Science (USA). All rights reserved.
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