Impaired chlorophyll formation in etiolated cucumber cotyledons following prolonged dark incubation after red light pretreatment

Cohen, L.; Arzee, T.

Physiologia Plantarum 60(3): 373-377

1984


ISSN/ISBN: 0031-9317
DOI: 10.1111/j.1399-3054.1984.tb06078.x
Accession: 001210052

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Abstract
Cucumber cotyledons which were dark incubated for 24 h following a red-light pulse greened more rapidly when exposed to white light than did non-irradiated cotyledons. Total chlorophyll accumulation after 24 h in the light was about the same in both. Increasing the period of dark incubation after red-light irradiation delayed greening, such that irradiated cotyledons dark incubated for 48 and 96 h accumulated 50 and 20%, respectively, of the chlorophyll accumulated after 24 h in white light by non-irradiated cotyledons dark incubated for 24 h. The red light effect was photoreversible by far-red light. Seedlings 4, 5 and 6 days old at the time of red light irradiation showed similar degrees of impaired chlorophyll synthesis following prolonged dark incubation.

Impaired chlorophyll formation in etiolated cucumber cotyledons following prolonged dark incubation after red light pretreatment