Nitric oxide, as a downstream signal, plays vital role in auxin induced cucumber tolerance to sodic alkaline stress

被引：36

作者：

Gong, Biao ^{[1
]}

Miao, Li ^{[1
]}

Kong, Wenjie ^{[2
]}

Bai, Ji-Gang ^{[3
]}

Wang, Xiufeng ^{[1
]}

Wei, Min ^{[1
]}

Shi, Qinghua ^{[1
]}

机构：

[1] Shandong Agr Univ, State Key Lab Crop Biol, Coll Hort Sci & Engn,Minist Agr, Sci Observing & Expt Stn Environm Controlled Agr, Tai An 271018, Shandong, Peoples R China

[2] Heze Univ, Resources & Environm Dept, Heze 274015, Peoples R China

[3] Shandong Agr Univ, Coll Life Sci, Tai An 271018, Shandong, Peoples R China

来源：

PLANT PHYSIOLOGY AND BIOCHEMISTRY | 2014年 / 83卷

基金：

中国国家自然科学基金;

关键词：

Cucumber; IAA; NO; ROS; Sodic alkaline stress; HYDROGEN-PEROXIDE; GROWTH; SALT; LEAVES; ANTIOXIDANTS; HOMEOSTASIS; POLYAMINES; TRANSPORT; RESPONSES; SALINITY;

D O I：

10.1016/j.plaphy.2014.08.004

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Nitric oxide (NO) and auxin (indole-3-acetic acid; IAA) play vital roles in regulating plants tolerance to abiotic stresses. This study showed that both NO and IAA could induce cucumber plants tolerance to sodic alkaline stress, which depended on their roles in regulating reactive oxygen species (ROS) scavenging, antioxidative enzymes activities, Na+ accumulation and protecting photosystems II (PSII) from damage. In addition, IAA has significant effect on NO accumulation in cucumber root, which could be responsible for IAA-induced sodic alkaline stress tolerance. Further investigation indicated that the function of IAA could be abolished by NO scavenger (cPTIO). On the contrary, IAA transport inhibitor (NPA) showed no significant effects on abolishing the function of NO. Based on these results, it could be concluded that NO is an essential downstream signal for IAA-induced cucumber tolerance to sodic alkaline stress. (C) 2014 Elsevier Masson SAS. All rights reserved.

引用

页码：258 / 266

页数：9

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