Cadmium stress inhibits the growth of primary roots by interfering auxin homeostasis in Sorghum bicolor seedlings
文献类型: 外文期刊
第一作者: Zhan, Yi-hua
作者: Zhan, Yi-hua;Yu, Chen-liang;Zhang, Cheng-hao;Zheng, Qiu-xun;Yu, Chen-liang;Huang, Zong-an
作者机构:
关键词: Auxin;Cd stress;Reactive oxygen species;Root growth;Sorghum bicolor
期刊名称:JOURNAL OF PLANT BIOLOGY ( 影响因子:2.434; 五年影响因子:2.455 )
ISSN: 1226-9239
年卷期: 2017 年 60 卷 6 期
页码:
收录情况: SCI
摘要: Phytotoxic effects of cadmium (Cd), a heavy metal pollutant, on plants have been extensively examined. Auxin plays vital roles in many aspects of plant development. The association between root growth and auxin signaling in Cd-stressed Sorghum bicolor was analyzed in our study. Root elongation, shoot length and the maximal photochemical efficiency (F-v/F-m) in S. bicolor seedlings were dramatically reduced after Cd stress treatment. Cd was found to be predominantly confined in the meristematic zone using a Cd-staining method. Cd stress remarkably influenced the cell cycle progression at the root tip as shown by EdU (ethynyl deoxyuridine) assay. The content of IAA was markedly diminished in the roots of Cd-stressed S. bicolor, which was along with the increase of IAA oxidase activity. Auxin transport inhibitors, 1-naphthoxyacetic acid (1-NOA) or 1- naphthylphthalamic acid (NPA), greatly reduced plant tolerance to Cd stress, whereas exogenous application of 1-naphthaleneacetic acid (NAA) improved Cd tolerance in S. bicolor seedlings. Cd stress altered the transcript level of some putative auxin biosynthetic genes. In addition, NAA interfered with the homeostasis of Cd-induced reactive oxygen species (ROS). These results revealed that Cd stress disturbed the growth of S. bicolor seedlings by affecting the homeostasis of auxin and ROS.
分类号:
- 相关文献
作者其他论文 更多>>
-
Genome-wide identification and expression analysis of the CaLAX and CaPIN gene families in pepper (Capsicum annuum L.) under various abiotic stresses and hormone treatments
作者:Zhang, Chenghao;Dong, Wenqi;Yu, Chenliang;Huang, Zong-an;Cho, MyeongCheoul;Yu, Qingcang;Wu, Chuanyu
关键词:abiotic stresses;auxin;Capsicum annuum;expression pattern;LAX;PIN
-
Genome-wide identification and expression analysis of CILAX, CIPIN and CIABCB genes families in Citrullus lanatus under various abiotic stresses and grafting
作者:Yu, Chenliang;Dong, Wenqi;Li, Zhimiao;Zhang, Chenghao;Zhan, Yihua;Huang, Zong-an;Kim, Il Seop
关键词:ABCB;Abiotic stresses;Grafting;LAX;PIN;Watermelon
-
Identification and Expression Profiling of the Auxin Response Factors in Capsicum annuum L. under Abiotic Stress and Hormone Treatments
作者:Yu, Chenliang;Zhan, Yihua;Sun, Chendong;Feng, Xuping;Huang, Zong-An
关键词:abiotic stresses;auxin;auxin response factor;Capsicum annuum;expression pattern