BIOL 341 Lecture Notes - Lecture 15: Phospholipid, Phloem, Rapeseed
1 Mar 2017
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Document Summary
When thing don"t go a planned: biotic & abiotic tre . An understanding of these signaling pathways is critical for many aspects of plant science. Signal transduction pathways are very tightly regulated: very low concentrations needed to trigger a pathway. Factors that influence the amount of active hormone: Many environmental factors are constantly engaging with the plant. Plant must decide which factors to respond to at which times to initiate hormone development. Auxins, gibberellins, cytokinins, ethylene, abscisic acid, brassinosteroids, salicyclic acid, strigolactone, jasmonic acid. Biosynthetic pathways contain many points of regulation via feedback signals. Not expected to know which physiological role each hormone is involved in (no questions like: what does hormone a do in a plant?) Auxin (iaa- indole-3-acetic acid: from (cid:862)auxei(cid:374)(cid:863) (cid:894)greek(cid:895) (cid:373)ea(cid:374)i(cid:374)g (cid:862)to grow(cid:863, bending of seedlings towards light. If tip of plant is cut off, the plant loses ability to bend.
