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INDEPENDENT EFFECTS OF PHYTOCHROME AND NITRATE ON NITRATE REDUCTASE AND NITRITE REDUCTASE ACTIVITIES IN MAIZE
Author(s) -
Sharma Arun Kumar,
Sopory Sudhir K.
Publication year - 1984
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1984.tb03880.x
Subject(s) - nitrate reductase , phytochrome , nitrite reductase , etiolation , nitrate , nitrite , zea mays , biology , reductase , enzyme , chemistry , botany , red light , biochemistry , agronomy , ecology
— Involvement of phytochrome in the regulation of nitrate reductase (NR) and nitrite reductase (NIR) activities in excised, etiolated leaves of Zea mays (L.) variety ‘Ganga‐5’ is demonstrated using low energy and high irradiance responses of phytochrome action. Photoreversibility by far‐red light of red light stimulated increases in NR and NIR activities was lost by 2 h. Red light given to the leaves, when induction by NO ‐ 3 , was saturated, further increased both enzyme activities. Even if red light was given 4–8 h before NO ‐ 3 , it still increased both NR and NIR activities.