Question

Describe the interactions of hormones and sucrose in the regulation of axillary bud growth in stems.

Answer 1

ANS) After many a long time of studies and discussion, even the simple mechanisms in the back of the manage of shoot branching continue to be obscure. the outcomes and interactions between numerous plant hormones, vitamins, water, mild and gravity have all been investigated, but their precise roles are nonetheless uncertain. of the hormones believed to be involved, auxin has been the maximum substantially studied, and a extremely good deal of physiological and molecular genetic proof has accrued to signify that it performs a crucial function.apically derived auxin has long been known to inhibit lateral bud growth, however since it seems now not to go into the bud, it has been proposed that its inhibitory effect is mediated by a second messenger. bscisic acid signalling isn't to be required for auxin motion, despite the fact that basally applied abscisic can decorate inhibition by apical auxin and apically applied abscisic acid can lessen it. by assessment, basally carried out cytokinin turned into located to launch lateral buds from inhibition by using apical auxin, at the same time as apically implemented cytokinin dramatically expanded the period of inhibition. these consequences are consistent with cytokinin appearing independently to adjust bud increase, instead of as a second messenger for auxin. however, in the absence of cytokinin-signalling mutants, a function for cytokinin as a second messenger for auxin can't be dominated out.