Control of Diurnal Variations in Photosynthetic Products | Zendy

B.T. Steer | Zendy

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Control of Diurnal Variations in Photosynthetic Products

Author(s) -

B.T. Steer

Publication year - 1974

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.54.5.762

Subject(s) - nitrate reductase , nitrate , photoperiodism , photosynthesis , period (music) , diurnal temperature variation , horticulture , botany , capsicum annuum , chemistry , biology , ecology , meteorology , physics , pepper , acoustics

Nitrate accumulates in the leaves of Capsicum annuum L. cv. California Wonder and the leaf content is dependent on the nitrate level supplied to the roots. There is no consistent diurnal periodicity in the leaf nitrate levels.Nitrate reductase activity exhibits three distinct peaks in the leaves. One in the dark period, a second at the time of the prevailing dawn, and a third 6 hours after the beginning of the photoperiod. The third peak of activity can be induced by a short period of illumination (20 minutes) which is also sufficient to induce the labeling of the amino acid fraction by (14)CO(2).

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