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Chapter 19 auxin.

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Presentation on theme: "Chapter 19 auxin."— Presentation transcript:

1 Chapter 19 auxin

2 Summary: early experiments in auxin research
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5 Auxin is transported to lower side of a horizontally oriented oat coleoptile tip
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6 Lateral redistribution of auxin during phototropism
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7 Auxin stimulates the elongation of oat coleoptile sections
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8 Kinetics of auxin-induced elongation and cell wall acidification in maize coleoptiles
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9 Figure 19.3 Structure of auxins
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10 Demonstration of polar auxin transport with radiolabelled auxin (B)
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11 Simplified chemiosmotic model of polar auxin transport
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12 Figure 19.20 Typical dose–response curve for IAA-induced growth
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13 Figure 19.15 Structures of auxin transport inhibitors
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14 Auxin transport inhibitors block secretion of PIN1 to the plasma membrane
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15 In Arabidopsis, two types of transport proteins direct the flow of auxin
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16 Figure 19.32 Current model for redistribution of auxin during gravitropism in maize roots
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17 Figure 19.28 Perception of gravity by statocytes of Arabidopsis
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18 Gravistimulation results in asymmetric auxin accumulation in lateral root cells
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19 Figure 19.31 Microsurgery experiments showed that the root cap supplies a root growth inhibitor
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20 Figure 19.30 Maize root bending toward a Ca2+-containing agar block
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21 BR2 gene encodes a P-glycoprotein required for normal auxin transport in corn
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22 Figure 19.7 Demonstration of the lack of gravity effects on basipetal auxin transport
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23 The strawberry “fruit” is a swollen receptacle
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