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Lag-phase and rate of synthesis in light-mediated anthocyanin synthesis.

Authors
Type
Published Article
Journal
Planta
Publication Date
Volume
151
Issue
6
Pages
541–543
Identifiers
DOI: 10.1007/BF00387432
PMID: 24302206
Source
Medline

Abstract

Mustard (Sinapis alba L.) seedlings were irradiated with continuous far-red light either with or without a pretreatment with 3 or 6 h of the same far-red light, separated by a 15 h dark period. The pretreatment increases the initial rate of anthocyanin accumulation - as caused by the 2nd light treatment - at least 6-fold but leads to an earlier cessation of anthocyanin accumulation. Moreover, the pretreatment seems to shorten the apparent lag-phase of anthocyanin accumulation considerably but it does not eliminate the lag. If the pretreatment with far-red light is terminated before the seedling reaches competence (with regard to phytochrome and anthocyanin synthesis) the pretreatment has no effect on the apparent lag-phase even though the future capacity of anthocyanin biogenesis is considerably stimulated by the pretreatment. The time course of induction of anthocyanin and that of phenylalanine ammonia-lyase (PAL) (Acton et al. 1980, Fig. 1) is in line with the concept that induction of PAL by light is a prerequisite for the onset of light-mediated anthocyanin synthesis.

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