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PHYTOCHROME CONTROL OF DEGREENING OF ATTACHED COTYLEDONS and PRIMARY LEAVES OF MUSTARD ( SINAPIS ALBA L.) SEEDLINGS*
Author(s) -
Biswal U. C.,
Kasemir H.,
Mohr H.
Publication year - 1982
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.1751-1097.1982.tb03839.x
Subject(s) - sinapis , white mustard , cotyledon , phytochrome , sowing , greening , horticulture , chlorophyll , biology , botany , pharbitis nil , vermiculite , red light , brassica , ecology
— Mustard ( Sinapis alba L.) seedlings were grown on moistened vermiculite without added nutrients for 17 days in medium white light (4.6 lx). During this period cotyledons as well as primary leaves expressed signs of senescence as defined by the loss of chlorophyll(ide) a (‘degreening’). While degreening was detectable 9 days after sowing in the cotyledons it was not measurable before 15 days after sowing in the primary leaves. Phytochrome retards the loss of chlorophyll(ide) a in both organs; however, it does not change the temporal pattern of greening and degreening.