Negative regulation of asparagine synthetase in the leaves of maize seedlings by light, benzyladenine and glucose
作者:
Edward Dembinski,
Iwona Wisniewska,
Jacek Zebrowski,
Konstancja Raczynska‐Bojanowska,
期刊:
Physiologia Plantarum
(WILEY Available online 1996)
卷期:
Volume 96,
issue 1
页码: 66-70
ISSN:0031-9317
年代: 1996
DOI:10.1111/j.1399-3054.1996.tb00184.x
出版商: Blackwell Publishing Ltd
关键词: Asparagine synthetase;cytokinin;light;maize;metabolic repression;red/far red;Zea mays
数据来源: WILEY
摘要:
Asparagine synthetase (EC 6.3.5.4) activity was increased 4‐ and 8‐fold when maize (Zea maysL.) seedlings were kept in darkness for 24 h and 7 days, respectively; this increase was abolished by cycloheximide. Irradiation of the dark adapted seedlings with a pulse of red light resulted in a 4‐fold decrease of the enzyme activity within 48 h, which was raised again following a far‐red light pulse. Co‐action of light and benzyladenine, reported for the light‐inducible enzymes, was proved to hold also for the light‐repressible asparagine synthetase. The induction of asparagine synthetase activity in the dark is abolished by glucose, suggesting the possible involvement of the enzyme in the contrae of metabolic fluxes of –carbon and nitrogen through assimi
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