Unformatted text preview: responses are internally signaled from the early embryo growth seed and fruit development seed dormancy mobilization for germination vegetative growth and development flowering senescence and death. Signal Transduction Pathways in Plants We learned in Biology 211 that hormones can function as signal molecules (or ligands) that trigger signal transduction pathways in cells. Such pathways often result in the synthesis of transcription factors that in turn promote synthesis of enzymes which facilitate chemical reactions within the cell (the response). In a similar fashion, a signal molecule may function to repress transcription. Signal transduction pathways are equally important for chemical messaging in plants as in animals and both environmental cues and hormones serve as signal stimuli. We shall examine several examples of plant growth regulation involving signal pathways in this section....
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- Fall '09
- Plants, signal transduction pathways, environmental cues