ISSN:
1618-0860
Keywords:
Keywords: Arabidopsis thaliana, AXR4, Auxin influx carrier, Auxin-resistant mutant, Gravitropic growth habit of root, Growth of root
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Arabidopsis thaliana, axr4 , was restored by the addition of 30–300 nM 1-naphthaleneacetic acid (NAA) to the growth medium. Neither indole-3-acetic acid (IAA) nor 2,4-dichlorophenoxyacetic acid (2,4-D) showed such an effect. Growth of axr4 roots was resistant to IAA and 2,4-D, but not at all to NAA. The differential effects of the three auxins suggest that the defects of axr4 result from a lower auxin influx into its cells. The partially agravitropic growth habit of axr1 roots, which was less severe than that of axr4 roots, was only slightly affected by the three auxins in the growth medium at concentrations up to 300 nM; growth of axr1 roots was resistant to all three of the auxins. These results suggest that the lesion of axr1 mutants is different from that of axr4.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/PL00013892