Timing of the initial action of phytochrome with regard to protochlorophyll synthesis in the mustard seedling
- 1 January 1976
- journal article
- research article
- Published by Springer Nature in Planta
- Vol. 132 (2), 157-160
- https://doi.org/10.1007/bf00388897
Abstract
Significant accumulation of photoconvertible protochlorophyll(ide) in the cotyledons of the mustard seedling takes place from 24 h after sowing onwards (25° C). The rate of accumulation in darkness is greatly increased by a pretreatment with red or far-red light. The strong effect of continuous red light, given from the time of sowing, remains fully reversible by a 756 nm-light pulse up to about 18 h after sowing. On the other hand, the effect of continuous far-red light which can be detected at 15 h after sowing is not influenced by a subsequent application of 756 nm-light pulses. An interpretation of the data requires the concept that continuous red light and continuous far-red light act from different sites. This conclusion is based on a comparison of the present data with the earlier published data on phytochromemediated anthocyanin synthesis in the mustard seedling cotyledons.This publication has 14 references indexed in Scilit:
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