BIO-0014 Lecture 16: What Auxin is and what it does
9 Mar 2017
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Signalling molecules are able to transmit information about the environment to other parts of the plant a. b. i. ii. 5: definition of auxin: any compound that allows seedling cells to enlarge in darkness a, enlarged cells on the left side, causing the curving, class of compounds, higher concentration of auxin leads to more bending c. i. Chemical compound of auxin: don t have to memorize this structure, has acetic acid side chain. Iaa: indole-3-acetic acid: auxin found in plants, only auxin that is naturally made, needed to be broken down after the growth has occurred ii. Synthetic auxins: created artificially by scientists, hoped to add to plants to increase the rate of growth of crops. The reason that 2,4-d is used instead of iaa to control bothersome plant growth is because: It persists longer in the environment: auxin effects: phototropism - bending of stems toward light i.
