Being sessile organisms, plants usually
have little control over their immediate
growth environment. Responses to
environmental and developmental factors
need to be rapid and finely coordinated to
trigger the necessary morphological and
metabolic changes that ensure plant
survival and growth.Many of these
adaptive responses are mediated by
plant hormones. Recent work has shown
that ubiquitin-mediated proteolysis
plays an important regulatory role in
hormone signaling.