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BOUGAINVILLEA INFLORESCENCE MERISTEM DEVELOPMENT: COMPARATIVE ACTION OF GA 3 IN VIVO AND IN VITRO
Author(s) -
Steffen Jody D.,
Sachs Roy M.,
Hackett Wesley P.
Publication year - 1988
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1988.tb08836.x
Subject(s) - meristem , biology , inflorescence , gibberellic acid , elongation , botany , in vitro , microbiology and biotechnology , shoot , germination , biochemistry , materials science , metallurgy , ultimate tensile strength
Although gibberellic acid (GA 3 ) promotes stem elongation and inhibits flowering in Bougainvillea , no inhibition of floret initiation was observed when excised meristems were cultured in vitro in media containing GA. These results are predicted by a nutrient diversion hypothesis in which GA‐induced inhibition of flower initiation in intact plants is considered an indirect result of growth promotion of competing vegetative sinks with consequent diversion of nutrients away from the inflorescence meristem. The failure to observe GA‐induced inhibition of floret initiation in vitro was probably the result of an excess of metabolites for growth and differentiation of the excised meristems in the media.