期刊
PLANT BIOLOGY
卷 17, 期 1, 页码 34-40出版社
WILEY
DOI: 10.1111/plb.12187
关键词
Auxin; cell elongation; development; lateral root; phototropin
资金
- General Researcher Supporting Fund through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [2009-0072217]
- BK-21 fund
- NSF [0843617]
We investigated the relationship between the blue light receptor phototropin 1 (phot1) and lateral root growth in Arabidopsis thaliana seedlings. Fluorescence and confocal microscopy images, as well as PHOT1 mRNA expression studies provide evidence that it is highly expressed in the elongation zone of lateral roots where auxin is accumulating. However, treatment with the auxin transport inhibitor N-1-naphthylphthalamic acid significantly reduced PHOT1 expression in this zone. In addition, PHOT1 expression was higher in darkness than in light. The total number of lateral roots was higher in the phot1 mutant than in wild-type Arabidopsis. Cells in the elongation zone of lateral roots of the phot1 mutant were longer than those of wild-type lateral roots. These findings suggest that PHOT1 plays a role(s) in elongation of lateral roots through the control of an auxin-related signalling pathway.
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