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| Arabidopsis Phytochrome D Is Involved in Red Light-Induced Negative Gravitropism of Hypocotyles |
| LIJian-ping , HOUPei , ZHENGXu , SONGMei-fang , SULiang , YANGJian-ping |
1、Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China
2、Institute of Nuclear and Biotechnology, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, P.R.China
3、Graduate School, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China |
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摘要 The phytochrome gene family, which is in Arabidopsis thaliana, consists of phytochromes A-E (phyA to phyE), regulates plant responses to ambient light environments. PhyA and phyB have been characterized in detail, but studies on phyC to phyE have reported discrepant functions. In this study, we show that phyD regulates the Arabidopsis gravitropic response by inhibiting negative gravitropism of hypocotyls under red light condition. PhyD had only a limited effect on the gravitropic response of roots in red light condition. PhyD also enhanced phyB-regulated gravitropic responses in hypocotyls. Moreover, the regulation of hypocotyl gravitropic responses by phyD was dependent upon the red light fluence rate.
Abstract The phytochrome gene family, which is in Arabidopsis thaliana, consists of phytochromes A-E (phyA to phyE), regulates plant responses to ambient light environments. PhyA and phyB have been characterized in detail, but studies on phyC to phyE have reported discrepant functions. In this study, we show that phyD regulates the Arabidopsis gravitropic response by inhibiting negative gravitropism of hypocotyls under red light condition. PhyD had only a limited effect on the gravitropic response of roots in red light condition. PhyD also enhanced phyB-regulated gravitropic responses in hypocotyls. Moreover, the regulation of hypocotyl gravitropic responses by phyD was dependent upon the red light fluence rate.
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Received: 09 May 2013
Accepted:
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| Fund: This work was financially supported by funds from the Genetically Modified Organisms Breeding Major Projects of China (2011ZX08010-002), the National Natural Science Foundation of China (30871438 and 31170267) and the Natural Science Foundation of Xinjiang, China (2012211B49). |
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Corresponding Authors:
YANG Jian-ping, Tel/Fax: +86-10-82105859, E-mail: yangjianping02@caas.cn
E-mail: yangjianping02@caas.cn
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| About author: LI Jian-ping, E-mail: ljp7786@126.com |
Cite this article:
LIJian-ping , HOUPei , ZHENGXu , SONGMei-fang , SULiang , YANGJian-ping .
2014.
Arabidopsis Phytochrome D Is Involved in Red Light-Induced Negative Gravitropism of Hypocotyles. Journal of Integrative Agriculture, 13(8): 1634-1639.
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