Ubiquitin-mediated proteolysis in plant hormone signal transduction.

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.