盐胁迫下菊芋根系脱落酸对钠离子转运和光系统Ⅱ的影响

doi:10.13287/j.1001-9332.202002.005

应用生态学报 ›› 2020, Vol. 31 ›› Issue (2): 508-514.doi: 10.13287/j.1001-9332.202002.005

盐胁迫下菊芋根系脱落酸对钠离子转运和光系统Ⅱ的影响

边甜甜^1,2, 颜坤², 韩广轩², 安孟鑫³, 杨润亚^1*

¹鲁东大学生命科学学院, 山东烟台 264025;
²中国科学院烟台海岸带研究所, 中国科学院海岸带环境过程与生态修复重点实验室, 山东烟台 264003;
³鲁东大学农学院, 山东烟台 264025

收稿日期:2019-08-11 出版日期:2020-02-15 发布日期:2020-02-15
通讯作者: * E-mail: yry74@163.com
作者简介:边甜甜, 女, 1993年生, 硕士研究生。主要从事植物生理生态研究。E-mail: czlbtt@163.com
基金资助:
本文由中国科学院重点部署项目(KFZD-SW-112)和山东省自然科学基金项目(ZR2017QC005)资助

Effects of root abscisic acid on Na⁺ transport and photosystem Ⅱ in Helianthus tuberosus under salt stress

BIAN Tian-tian^1,2, YAN Kun², HAN Guang-xuan², AN Meng-xin³, YANG Run-ya^1*

¹School of Life Sciences, Ludong University, Yantai 264025, Shandong, China;
²CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences CAS, Yantai 264003, Shandong, China;
³School of Agriculture, Ludong University, Yantai 264025, Shandong, China

Received:2019-08-11 Online:2020-02-15 Published:2020-02-15
Contact: * E-mail: yry74@163.com
Supported by:
This work was supported by the Key Deployment Project of Chinese Academy of Sciences (KFZD-SW-112) and the Natural Science Foundation of Shandong Province (ZR2017QC005).

摘要/Abstract

摘要： 通过根系施加脱落酸(ABA)合成抑制剂钨酸钠,研究盐胁迫(150 mmol·L^-1 NaCl)下菊芋根系ABA信号对根系Na⁺转运、叶片Na⁺积累和光系统Ⅱ(PSⅡ)的影响。结果表明:钨酸钠抑制盐胁迫下根系ABA合成,降低根系Na⁺外排,提高根系Na⁺向叶片的转运系数。盐胁迫增加叶片Na⁺含量,没有影响叶片膜脂过氧化、PSⅡ反应中心蛋白合成和PSⅡ最大光化学效率(F_v/F_m)。根系ABA合成受抑制,显著增加盐胁迫下叶片Na⁺积累,加剧叶片膜脂过氧化,损伤PSⅡ反应中心蛋白,显著降低F_v/F_m,诱发PSⅡ光抑制。总之,盐胁迫下菊芋根系ABA信号诱导根系Na⁺外排,抑制Na⁺向地上部转运,有利于减少叶片Na⁺积累,防御PSⅡ氧化损伤。

Abstract: The effects of root abscisic acid (ABA) signal on Na⁺ transport and photosystem Ⅱ (PSⅡ) in Jerusalem artichoke (Helianthus tuberosus) under salt stress (150 mmol·L^-1 NaCl) were examined by applying ABA synthesis inhibitor sodium tungstate to roots. Sodium tungstate inhibited ABA synthesis in roots, reduced root Na⁺ efflux, and increased the efficiency of Na⁺ transport from roots to leaves under salt stress. Salt stress increased leaf Na⁺ content and did not affect leaf membrane lipid peroxidation, PSⅡ reaction center protein and PSⅡ maximum photochemical efficiency (F_v/F_m ). The inhibition on root ABA synthesis significantly increased leaf Na⁺ accumulation, aggravated leaf membrane lipid peroxidation, impaired PSⅡ reaction center protein, decreased F_v/F_m, and induced PSⅡ photoinhibition. In conclusion, root ABA signal was beneficial to reducing leaf Na⁺ accumulation and preventing PSⅡ oxidative damage by inducing root Na⁺ efflux and inhibiting Na⁺ transport to the aerial part in H. tuberosus under salt stress.

边甜甜, 颜坤, 韩广轩, 安孟鑫, 杨润亚. 盐胁迫下菊芋根系脱落酸对钠离子转运和光系统Ⅱ的影响[J]. 应用生态学报, 2020, 31(2): 508-514.

BIAN Tian-tian, YAN Kun, HAN Guang-xuan, AN Meng-xin, YANG Run-ya. Effects of root abscisic acid on Na⁺ transport and photosystem Ⅱ in Helianthus tuberosus under salt stress[J]. Chinese Journal of Applied Ecology, 2020, 31(2): 508-514.

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盐胁迫下菊芋根系脱落酸对钠离子转运和光系统Ⅱ的影响

Effects of root abscisic acid on Na⁺ transport and photosystem Ⅱ in Helianthus tuberosus under salt stress

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盐胁迫下菊芋根系脱落酸对钠离子转运和光系统Ⅱ的影响

Effects of root abscisic acid on Na+ transport and photosystem Ⅱ in Helianthus tuberosus under salt stress

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Effects of root abscisic acid on Na⁺ transport and photosystem Ⅱ in Helianthus tuberosus under salt stress