MADS-box transcription factor AGL21 regulates lateral root development and responds to multiple external and physiological signals.
Bottom Line: AGL21 was induced by many plant hormones and environmental stresses, suggesting a function of this gene in root system plasticity in response to various signals.Furthermore, AGL21 was found positively regulating auxin accumulation in lateral root primordia and lateral roots by enhancing local auxin biosynthesis, thus stimulating lateral root initiation and growth.We propose that AGL21 may be involved in various environmental and physiological signals-mediated lateral root development and growth.
Affiliation: School of Life Sciences, University of Science and Technology of China, Hefei, Anhui Province 230027, China.Show MeSH
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Mentions: The LR phenotypes of agl21 mutant and the overexpression lines implicate that root auxin level might be affected. To verify whether endogenous auxin content was changed, we measured endogenous IAA in the root. The results in Figure 8A show that IAA content was significantly increased in the overexpression line and reduced in the knockout mutant compared with that in the wild-type.
Affiliation: School of Life Sciences, University of Science and Technology of China, Hefei, Anhui Province 230027, China.