Phytotoxicity of the chiral herbicide dichlorprop: Cross-talk between nitric oxide, reactive oxygen species and phytohormones
Phytotoxicity of the chiral herbicide dichlorprop: Cross-talk between nitric oxide, reactive oxygen species and phytohormones
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手性除草剂二氯丙酸的植物毒性：一氧化氮、活性氧和植物激素之间的相互作用
DOI：
10.1016/j.scitotenv.2021.147866
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发表时间：
2021-05-24
影响因子：
9.8
通讯作者：
Wen, Yuezhong
中科院分区：
文献类型：
--
作者：
Chen, Hui;Qin, Yongxiang;Wen, Yuezhong
一氧化氮（NO）、活性氧（ROS）和植物激素常引起植物对非生物胁迫的反应。然而，我们对外源手性生长素诱导的植物毒性过程中NO、ROS和植物激素之间的串扰了解甚少。以拟南芥为材料，研究了手性生长素类除草剂敌敌畏（DCPP）对拟南芥的毒性，以及NO、H2 O2、O2-和植物激素在对映体水平上的相互调控作用。活性氧的产生具有对映体选择性，并与形态学指标的变化呈正相关。这证实了活性氧在DCPP的对映体选择性效应中起重要作用。ROS和NO的分布有部分重叠，说明NO的产生可能受到ROS的影响，也与植物受害程度有关。在植物激素方面，随着（R）-DCPP处理浓度的增加，整株植株中水杨酸（SA）、茉莉酸（JA）和脱落酸（阿坝）含量增加，但当分别对叶片和蛾类进行分析时，这一趋势发生了变化。结果表明，植物激素在叶片和根系之间可能存在再分配，这是ROS和NO共同作用的结果。本研究中两种对映体生物活性的差异增强了我们对外源生长素通过影响植物激素毒性机制的理解。(C)2021爱思唯尔有限公司版权所有。
Nitric oxide (NO), reactive oxygen species (ROS), and phytohormones in plants often initiate responses to sources of abiotic stress. However, we have a poor understanding of the cross-talk between NO, ROS, and phytohormones during exogenous chiral auxin-induced phytotoxicity. In this study, the toxicity of the chiral synthetic auxin herbicide dichlorprop (DCPP) to Arabidopsis (hallow, as well as the mutual regulation of NO, hydrogen peroxide (H2O2), superoxide anion (O-2), and phytohormones at the enantiomeric level was investigated. The ROS production exhibited an enantioselective manner, further, that was positively correlated with the change of the morphological indicators. This confirmed that ROS played an important role in the enantioselective effect of DCPP. The distribution of ROS and NO was partially overlapped, indicating that the production of NO may be affected by ROS, and also related to the degree of plant damage. In terms of phytohormones, the level of salicylic add (SA), jasmonic acid (JA), and absdsic add (ABA) in the whole plant increased as the (R)-DCPP concentration applied increased, however, the trend has changed, when the data of leaves and mots was discussed separately. The results revealed that the redistribution of phytohormones may exist between leaves and roots, caused by the joint action of ROS and NO. The differences in the biological activity identified between the two enantiomers in this study enhance our understanding of the toxicity mechanism of exogenous auxin via their effects on phytohormones. (C) 2021 Elsevier B.V. All rights reserved.