GR24 alleviates the adverse effects of drought stress on physiology and photosystem II function in alfalfa (Medicago Sativa L.)

IF 1.1 4区农林科学 Q3 AGRICULTURE, MULTIDISCIPLINARY Grassland Science Pub Date : 2022-11-30 DOI:10.1111/grs.12392

Yuwei Yang, Mingzhou Gu, Junfeng Lu, Xiaotong Li, Dalin Liu, Xin'e Li, Lin Wang

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引用次数: 2

Abstract

Drought is a major environmental stress that limits growth and development of plants. Strigolactone, a kind of carotenoid-derived sesquiterpenoid hormone, plays an important role in resisting abiotic stress for plants. In this study, alfalfa (Medicago Sativa L.) WL-712 was sprayed with GR24 (a synthetic strigolactone analog) at the concentration of 0.1 μM for 3 days under drought stress for 1 week. The results showed that GR24 treatment could increase the contents of soluble protein and soluble sugar and decrease the content of malondialdehyde, which negatively affected by drought stress in alfalfa. In addition, GR24 treatment significantly enhanced superoxide dismutase and the activities of peroxidase and catalase in alfalfa. The JIP test analysis also indicated that GR24 could alleviate photosynthesis negatively affected by drought stress. The expressions of genes related to photosynthesis were consistent with the changes of physiological indexes in alfalfa. This study indicated that GR24 could alleviate the adverse effects of drought stress on physiology and photosystem II function in alfalfa leaves.

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GR24缓解干旱胁迫对紫花苜蓿生理和光系统II功能的不利影响

干旱是限制植物生长发育的主要环境压力。独角麦内酯是一类类胡萝卜素衍生的倍半萜类激素，在植物抗非生物胁迫中起着重要作用。在本研究中，紫花苜蓿(Medicago Sativa L.)在干旱胁迫1周的条件下，以浓度为0.1 μM的GR24(人工合成的孤孤内酯类似物)喷淋WL-712 3天。结果表明，GR24处理可提高苜蓿可溶性蛋白和可溶性糖含量，降低丙二醛含量，对干旱胁迫有不利影响。此外，GR24处理显著提高了苜蓿超氧化物歧化酶以及过氧化物酶和过氧化氢酶的活性。JIP试验分析还表明，GR24能够缓解干旱胁迫对光合作用的负面影响。光合作用相关基因的表达与紫花苜蓿生理指标的变化一致。本研究表明，GR24可以缓解干旱胁迫对紫花苜蓿叶片生理和光系统II功能的不利影响。

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来源期刊

Grassland Science Agricultural and Biological Sciences-Agronomy and Crop Science

CiteScore

2.70

自引率

7.70%

发文量

审稿时长

>12 weeks

期刊介绍： Grassland Science is the official English language journal of the Japanese Society of Grassland Science. It publishes original research papers, review articles and short reports in all aspects of grassland science, with an aim of presenting and sharing knowledge, ideas and philosophies on better management and use of grasslands, forage crops and turf plants for both agricultural and non-agricultural purposes across the world. Contributions from anyone, non-members as well as members, are welcome in any of the following fields: grassland environment, landscape, ecology and systems analysis; pasture and lawn establishment, management and cultivation; grassland utilization, animal management, behavior, nutrition and production; forage conservation, processing, storage, utilization and nutritive value; physiology, morphology, pathology and entomology of plants; breeding and genetics; physicochemical property of soil, soil animals and microorganisms and plant nutrition; economics in grassland systems.

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