UV-B Radiation Induces Root Bending Through the Flavonoid-Mediated Auxin Pathway in Arabidopsis
Ultraviolet (UV)-B radiation-induced root bending has been reported; however, the underlying mechanisms largely remain unclear. Here, we investigate whether and how auxin and flavonoids are involved in UV-B radiation-induced root bending in Arabidopsis using physiological, pharmacological, and genet...
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doaj-44e788b1c3a54e0c83f44e016aec89bb2020-11-24T23:09:08ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2018-05-01910.3389/fpls.2018.00618365043UV-B Radiation Induces Root Bending Through the Flavonoid-Mediated Auxin Pathway in ArabidopsisJinpeng Wan0Jinpeng Wan1Ping Zhang2Ping Zhang3Ruling Wang4Liangliang Sun5Wenying Wang6Huakun Zhou7Jin Xu8Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, ChinaUniversity of Chinese Academy of Sciences, Beijing, ChinaKey Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, ChinaUniversity of Chinese Academy of Sciences, Beijing, ChinaKey Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, ChinaKey Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, ChinaCollege of Life Science, Qinghai Normal University, Xining, ChinaKey Laboratory of Restoration Ecology of Cold Area in Qinghai Province, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, ChinaKey Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, ChinaUltraviolet (UV)-B radiation-induced root bending has been reported; however, the underlying mechanisms largely remain unclear. Here, we investigate whether and how auxin and flavonoids are involved in UV-B radiation-induced root bending in Arabidopsis using physiological, pharmacological, and genetic approaches. UV-B radiation modulated the direction of root growth by decreasing IAA biosynthesis and affecting auxin distribution in the root tips, where reduced auxin accumulation and asymmetric auxin distribution were observed. UV-B radiation increased the distribution of auxin on the nonradiated side of the root tips, promoting growth and causing root bending. Further analysis indicated that UV-B induced an asymmetric accumulation of flavonoids; this pathway is involved in modulating the accumulation and asymmetric distribution of auxin in root tips and the subsequent redirection of root growth by altering the distribution of auxin carriers in response to UV-B radiation. Taken together, our results indicate that UV-B radiation-induced root bending occurred through a flavonoid-mediated phototropic response to UV-B radiation.http://journal.frontiersin.org/article/10.3389/fpls.2018.00618/fullultraviolet (UV)-Broot bendingtropismauxinflavonoids |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jinpeng Wan Jinpeng Wan Ping Zhang Ping Zhang Ruling Wang Liangliang Sun Wenying Wang Huakun Zhou Jin Xu |
spellingShingle |
Jinpeng Wan Jinpeng Wan Ping Zhang Ping Zhang Ruling Wang Liangliang Sun Wenying Wang Huakun Zhou Jin Xu UV-B Radiation Induces Root Bending Through the Flavonoid-Mediated Auxin Pathway in Arabidopsis Frontiers in Plant Science ultraviolet (UV)-B root bending tropism auxin flavonoids |
author_facet |
Jinpeng Wan Jinpeng Wan Ping Zhang Ping Zhang Ruling Wang Liangliang Sun Wenying Wang Huakun Zhou Jin Xu |
author_sort |
Jinpeng Wan |
title |
UV-B Radiation Induces Root Bending Through the Flavonoid-Mediated Auxin Pathway in Arabidopsis |
title_short |
UV-B Radiation Induces Root Bending Through the Flavonoid-Mediated Auxin Pathway in Arabidopsis |
title_full |
UV-B Radiation Induces Root Bending Through the Flavonoid-Mediated Auxin Pathway in Arabidopsis |
title_fullStr |
UV-B Radiation Induces Root Bending Through the Flavonoid-Mediated Auxin Pathway in Arabidopsis |
title_full_unstemmed |
UV-B Radiation Induces Root Bending Through the Flavonoid-Mediated Auxin Pathway in Arabidopsis |
title_sort |
uv-b radiation induces root bending through the flavonoid-mediated auxin pathway in arabidopsis |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Plant Science |
issn |
1664-462X |
publishDate |
2018-05-01 |
description |
Ultraviolet (UV)-B radiation-induced root bending has been reported; however, the underlying mechanisms largely remain unclear. Here, we investigate whether and how auxin and flavonoids are involved in UV-B radiation-induced root bending in Arabidopsis using physiological, pharmacological, and genetic approaches. UV-B radiation modulated the direction of root growth by decreasing IAA biosynthesis and affecting auxin distribution in the root tips, where reduced auxin accumulation and asymmetric auxin distribution were observed. UV-B radiation increased the distribution of auxin on the nonradiated side of the root tips, promoting growth and causing root bending. Further analysis indicated that UV-B induced an asymmetric accumulation of flavonoids; this pathway is involved in modulating the accumulation and asymmetric distribution of auxin in root tips and the subsequent redirection of root growth by altering the distribution of auxin carriers in response to UV-B radiation. Taken together, our results indicate that UV-B radiation-induced root bending occurred through a flavonoid-mediated phototropic response to UV-B radiation. |
topic |
ultraviolet (UV)-B root bending tropism auxin flavonoids |
url |
http://journal.frontiersin.org/article/10.3389/fpls.2018.00618/full |
work_keys_str_mv |
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