外源γ-氨基丁酸通过保护光合系统和促进热休克蛋白的表达增强猕猴桃植物的耐热性

IF 3.5 2区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY
Liuqing Huo , Yunyun Chen , Yuman Zhang, Hao Zhang, Hujing Wang, Kai Xu, Xuepeng Sun
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引用次数: 0

摘要

猕猴桃植株极易受到大气温度升高的影响,极端高温往往会导致果实产量和质量下降。γ-氨基丁酸(GABA)已被广泛证明在植物应对非生物胁迫中发挥重要作用,在农业领域应用以克服环境挑战方面具有重要潜力。然而,在猕猴桃植物中应用 GABA 抵抗外部胁迫的研究尚未见报道。本研究发现,用 0.5 mM GABA 对猕猴桃植株进行预灌溉可有效缓解热损伤。GABA 处理可提高高温下猕猴桃植株的抗氧化能力,减少 ROS 的产生。此外,外源 GABA 还能保护高温下猕猴桃植株的光合系统。特别是,我们发现内源 ABA、Glu、Pro 代谢参与了 GABA 介导的猕猴桃植株的耐热性。此外,GABA 处理诱导猕猴桃植株中 AdHsps 的高表达,这也是猕猴桃植株在热胁迫下表现更佳的部分原因。综上所述,本研究首次证明了外源 GABA 处理对猕猴桃植物应对极端热胁迫具有积极作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Exogenous γ-aminobutyric acid enhances heat tolerance of kiwifruit plants by protecting photosynthetic system and promoting heat shock proteins expression

Kiwifruit plants are highly susceptible to increased atmospheric temperature, and the extreme high temperature often causes the loss of production and quality of the fruit. The γ-aminobutyric acid (GABA) has been widely proved to play important roles in plants in response to abiotic stresses, showing an important potential for application in agricultural industry to overcome environmental challenges. However, application of GABA in kiwifruit plants to resist external stresses has not been reported yet. This study found that pre-irrigation of kiwifruit plants with 0.5 mM GABA was effective in alleviating the heat damage on them. GABA treatment led to better antioxidant capacity and reduced ROS production in kiwifruit plants under high temperature. Moreover, exogenous GABA protected the photosynthetic system of kiwifruit plants when exposed to high temperature. Particularly, we found that endogenous ABA, Glu, Pro metabolisms were participated in the GABA-mediated heat resistance of kiwifruit plants. Furthermore, GABA treatment induced higher expression of AdHsps in kiwifruit plants, being partly responsible for their better performance under heat stress. In summary, this research first demonstrated that exogenous GABA treatment plays a positive role in kiwifruit plants to response to extreme heat stress.

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来源期刊
Annals of Agricultural Science
Annals of Agricultural Science AGRICULTURE, MULTIDISCIPLINARY-
CiteScore
12.60
自引率
0.00%
发文量
18
审稿时长
33 days
期刊介绍: Annals of Agricultural Sciences (AOAS) is the official journal of Faculty of Agriculture, Ain Shams University. AOAS is an open access peer-reviewed journal publishing original research articles and review articles on experimental and modelling research at laboratory, field, farm, landscape, and industrial levels. AOAS aims to maximize the quality of the agricultural sector across the globe with emphasis on the Arabian countries by focusing on publishing the high-quality applicable researches, in addition to the new methods and frontiers leading to maximizing the quality and quantity of both plant and animal yield and final products.
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