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首页> 外文期刊>Acta Physiologiae Plantarum >Water limitation mitigates high-temperature stress injuries in grapevine cultivars through changes in photosystem II efficiency and antioxidant enzyme pathways
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Water limitation mitigates high-temperature stress injuries in grapevine cultivars through changes in photosystem II efficiency and antioxidant enzyme pathways

机译：通过光系统II效率和抗氧化酶途径的变化，水限制减轻了葡萄品种的高温胁迫损伤

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摘要

Plants, via physiological and molecular processes, respond to unsuitable environmental conditions, resulting in stress tolerance. Most previous studies have focused on plant responses to a single abiotic stress, but the effects of combined water deficit and high temperature stresses are more severe and complex than those due to a single stress. Therefore, our study aimed to explore the differences in the damage caused by combined vs. single stresses. Grapevines were subjected to water deficit, high temperature, and water deficit plus high temperature treatments. The transcript levels of heat- and drought-stress genes, activities of photosystem II (PS II) and antioxidant enzymes (superoxide dismutase, catalase, and peroxidase), and changes in abscisic acid (ABA) biosynthesis were evaluated. The activities of PS II and antioxidant enzymes were lower under the water deficit plus high temperature treatment than under the heat treatment alone. The concentration of ABA and the transcript levels of ABA biosynthesis-related genes increased under both types of stress. The enhanced thermo-tolerance observed under drought stress could be attributed to increased PS II efficiency, as well as to changes in antioxidant pathways, mediated by a common regulatory system or including a substantial cross talk between heat- and drought-stress signaling.
机译：通过生理和分子过程植物响应不适合的环境条件，导致应力耐受性。最先前的研究专注于植物对单一的非生物胁迫的反应，但是含水缺损和高温胁迫的影响比单一应力引起的更严重和复合。因此，我们的研究旨在探讨由对单一应力组合引起的损害的差异。葡萄园受水赤字，高温和水赤字加上高温处理。评估了热 - 胁迫基因的转录水平，光系统II（PS II）和抗氧化酶（超氧化物歧化酶，过氧化物酶）和脱落酸（ABA）生物合成的变化。 PS II和抗氧化剂酶的活性在水缺损加上高温处理下较低，而不是单独的热处理。 ABA的浓度和ABA生物合成相关基因的转录水平在两种类型的压力下增加。在干旱胁迫下观察到的增强的热耐受性可能归因于增加的PS II效率，以及由共同的调节系统介导的抗氧化途径的变化，或者包括在热和干旱应激信号传导之间的大量交叉谈话。

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  • 来源
    《Acta Physiologiae Plantarum》 |2019年第6期|共11页
  • 作者

    Zha Qian; Xi Xiaojun; He Yani; Jiang Aili; Fang Xianping;

  • 作者单位

    Shanghai Acad Agr Sci Res Inst Forestry &

    Pomol Shanghai Key Labs Protected Hort Technol Shanghai 201403 Peoples R China;

    Shanghai Acad Agr Sci Res Inst Forestry &

    Pomol Shanghai Key Labs Protected Hort Technol Shanghai 201403 Peoples R China;

    Shanghai Acad Agr Sci Res Inst Forestry &

    Pomol Shanghai Key Labs Protected Hort Technol Shanghai 201403 Peoples R China;

    Shanghai Acad Agr Sci Res Inst Forestry &

    Pomol Shanghai Key Labs Protected Hort Technol Shanghai 201403 Peoples R China;

    Shanghai Acad Agr Sci Res Inst Forestry &

    Pomol Shanghai Key Labs Protected Hort Technol Shanghai 201403 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 植物学;
  • 关键词

    Antioxidant pathways; Grapevine; High temperature; PS II; Water deficit;

    机译：抗氧化途径;葡萄树;高温;PS II;水资源赤字;

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