BI111 Chapter Notes - Chapter 31: Pollen Tube, Meristem, Germination
Document Summary
A signaling molecule that regulates or helps coordinate some aspect of plant"s growth, metabolism, or development. When a perennial or biennial plant stops growing under conditions that seem quite suitable for growth. Regulated by a biological clock (internal time-measuring mechanisms with biochemical basis) and are 24 hour cycles. Mechanical stimulation triggers a membrane action potential; water then enters or exits cells triggering leaf folding. Responses to light, blue light receptors trigger auxin transport. Orients plant parts to the pull of gravity. Statoliths (modified plasmids) move in response to gravity statolith. Particles in certain cells that move in the direction gravity pulls them second-messenger system abscission zone acid-growth hypothesis. Describe what hormones do, and what cues they are produced in response. Hormones alter behaviour of target cells when signal molecules bind to receptors in target cells and elicit a cellular response.
