Phytochrome-mediated light regulation of nitrate reductase expression in squash cotyledons

In etiolated squash (Cucurbita maxima L.) cotyledons, nitrate-inducible NADH:nitrate reductase activity and protein were increased in darkness by red light pulses with red/far-red photoreversibility. Continuous far-red light also led to increased levels of nitrate reductase activity and protein. Pol...

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Bibliographic Details
Published in:Plant physiology (Bethesda) 1988-10, Vol.88 (2), p.242-244
Main Authors: Rajasekhar, V.K, Gowri, G, Campbell, W.H
Format: Article
Language:English
Subjects:
ACTIVIDAD ENZIMATICA
ACTIVITE ENZYMATIQUE
Biological and medical sciences
Communications
Complementary DNA
Corn
COTILEDONES
COTYLEDON
COTYLEDONS
CUCURBITA MAXIMA
Enzymes
ENZYMIC ACTIVITY
Fundamental and applied biological sciences. Psychology
Gene expression regulation
LIGHT
LUMIERE
LUZ
Messenger RNA
Metabolism
Molecular Biology and Gene Regulation
Nitrates
OXIDOREDUCTASES
OXIDORREDUCTASAS
OXYDOREDUCTASE
PIGMENT
PIGMENTOS
PIGMENTS
Plant physiology and development
Plants
RNA
Seedlings
Squashes
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Summary:In etiolated squash (Cucurbita maxima L.) cotyledons, nitrate-inducible NADH:nitrate reductase activity and protein were increased in darkness by red light pulses with red/far-red photoreversibility. Continuous far-red light also led to increased levels of nitrate reductase activity and protein. Poly(A)+ RNA, which hybridizes to squash nitrate reductase cDNA, was also increased by light treatments. Thus, we found that after nitrate triggering, nitrate reductase expression appears to be regulated by light via phytochrome.
ISSN:0032-0889
1532-2548
DOI:10.1104/pp.88.2.242