Temperature-sensitive Responses of Red Light-dependent Betacyanin Synthesis 1
AUTOR(ES)
Elliott, Daphne C.
RESUMO
Amaranthus tricolor half-seedlings show a greater accumulation of betacyanin in response to a defined period of red light if given a pretreatment at an elevated temperature (40 C). Red light given before the shift to 40 C is ineffective. The maximum response is achieved after a 2-hour shift to 40 C and if the red light is given 1 hour after return to the germination temperature (25 C). The effect on red light induction of betacyanin synthesis and on fusicoccin induction by these conditions is similar, whereas the increase in cytokinin-dependent synthesis is greater. Both phytochrome-cytokinin synergism and fusicoccin-cytokinin synergism are changed in the same manner by this treatment. Phytochrome and fusicoccin responses are inhibited similarly by carbonyl-cyanide-p-trifluoromethoxy-phenylhydrazone.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=543129Documentos Relacionados
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