BIOL 240M Chapter Notes - Chapter 39: Cytokinin, Auxin, Chlorophyll
Document Summary
Chapter 39 plant responses to internal and external signals. Perception, transduction, response: don"t need to know a. i. Auxins, strigolactones, cytokinins, gibberellins, brassinosteroids, abscisic acid, ethylene b. ii. Do not have specific organs located far from the site of action producing hormones. Whichever side of the shoot has more auxin will grow more causing the plant to bend toward the light b. iii. The side growing more is the shaded side: dr5 auxin stimulated gene c. i. Can track expression with dyes with dr5::gus c. i. 1. Promoter and reporter, respectively: lateral redistribution of auxin changes growth rates on both sides of the shoot, major functions of auxin e. i. Inhibits elongation growth of primary roots e. iii. 1. e. iii. 2. Auxin accumulates on the lower side of roots, and they bend down e. iv. Promotes production of lateral and adventitious roots e. iv. 1. Adventitious roots that grow from shoot tissue, not root tissue e. iv. 2. Elevated auxin synthesis within a single cell is sufficient to initiate a lateral root e. iv. 3.
