Transcript Chapter 19 Auxin

Chapter 19 auxin
Summary: early experiments in auxin research
Auxin is transported to lower side of a
horizontally oriented oat coleoptile tip
Figure 19.27
Lateral redistribution of auxin during
phototropism
Auxin stimulates the elongation of oat coleoptile sections
Kinetics of auxin-induced elongation and cell
wall acidification in maize coleoptiles
Figure 19.23
Figure 19.3 Structure of auxins
Demonstration of polar auxin transport
with radiolabelled auxin (B)
Figure 19.6
Simplified chemiosmotic model of
polar auxin transport
Figure 19.20 Typical dose–response
curve for IAA-induced growth
Figure 19.15 Structures of auxin
transport inhibitors
Auxin transport inhibitors block secretion
of PIN1 to the plasma membrane
In Arabidopsis, two types of transport proteins
direct the flow of auxin
Figure 19.32 Current model for
redistribution of auxin during
gravitropism in maize roots
Figure 19.28 Perception of gravity by
statocytes of Arabidopsis
Gravistimulation results in asymmetric auxin
accumulation in lateral root cells
Figure 19.33
Figure 19.31 Microsurgery
experiments showed that the root cap
supplies a root growth inhibitor
Figure 19.30 Maize root bending
toward a Ca2+-containing agar block
BR2 gene encodes a P-glycoprotein
required for normal auxin transport in corn
Figure 19.7 Demonstration of the lack of gravity
effects on basipetal auxin transport
The strawberry “fruit” is a swollen
receptacle