内生菌通过生长、生理和生物化学防御机制改善盐胁迫的作用:荟萃分析。

IF 5.4 2区 生物学 Q1 PLANT SCIENCES
Yue-Yang Zhang, Li Wen, Tong-Tong Wang, Yan-Zhong Li
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引用次数: 0

摘要

内生菌是一类广泛分布于植物体内的内共生微生物,正成为提高植物耐盐性的一种有前景的策略。然而,内生菌在减轻盐度方面的作用尚未完全了解。本研究基于98篇论文2143个配对观测数据,对植物内生菌在盐胁迫响应中的作用、内生真菌和细菌、C3和C4植物以及高、中、低盐水平对盐胁迫的不同响应进行了meta分析。结果表明,内生菌可直接或间接地引起植物生理活性、植物激素、渗透调节和抗氧化能力的显著改变,从而提高植物的耐盐性。内生菌能更好地维持生物量,而内生真菌能更好地调节渗透压、激素水平和氧化损伤,这是由于内生真菌减缓植物生长以适应盐胁迫。由于C4植物具有较高的水分、氮和辐射利用效率以及独特的光合作用机制,C3植物的内生菌能较好地维持生物量和光合作用,C4植物的含水量和清除活性氧(ROS)能力较好。在高盐和中盐胁迫下,内生菌对盐胁迫的缓解效果优于低盐胁迫,这是由于内生菌在盐胁迫下显著增加了调控基因,改变了代谢途径。这些结果对于提高对植物内生共生机制对盐胁迫的认识,进一步提高内生菌接种对盐胁迫的抗性具有重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Role of Endophyte in Salinity Stress Amelioration by Growth, Physiology, and Biochemistry Mechanisms of Defense: A Meta-Analysis.

Endophytes, a class of endosymbiotic microorganisms widely distributed among plants, are becoming a promising strategy for improving plant salt stress tolerance. However, the role of endophytes in mitigating salinity is not yet fully understood. Here, based on a database including 2143 paired observations from 98 papers, a meta-analysis was conducted on the role of endophytes in plant responses to salt stress and the different responses conferred by endophytic fungi and bacteria, C3 and C4 plants and high, middle, and low salt levels. The results showed that endophytes directly or indirectly triggered significant alterations in the physiological activity, phytohormone, osmotic regulation, and antioxidant capacity of plants to improve the salt tolerance of plants. Endophytic bacteria maintained biomass better, while endophytic fungi regulated osmotic pressure, hormone levels, and oxidative damage better, which is due to endophytic fungi slowing plant growth to adapt to salt stress. Endophytes maintained biomass and photosynthesis better in C3 plants, and water content and clearing reactive oxygen species (ROS) better in C4 plants, attributed to higher water, nitrogen, and radiation use efficiencies and the unique photosynthesis mechanism of C4 plants. Under high and middle salt stress, the endophytes reduced salt stress better than under low salt stress, which is due to endophytes significantly increasing regulated genes and changing metabolic pathways under salt stress. These results are important to improve our understanding of endophyte-plant symbiont mechanisms to salt stress and further enhance salt resistance by endophyte inoculation.

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来源期刊
Physiologia plantarum
Physiologia plantarum 生物-植物科学
CiteScore
11.00
自引率
3.10%
发文量
224
审稿时长
3.9 months
期刊介绍: Physiologia Plantarum is an international journal committed to publishing the best full-length original research papers that advance our understanding of primary mechanisms of plant development, growth and productivity as well as plant interactions with the biotic and abiotic environment. All organisational levels of experimental plant biology – from molecular and cell biology, biochemistry and biophysics to ecophysiology and global change biology – fall within the scope of the journal. The content is distributed between 5 main subject areas supervised by Subject Editors specialised in the respective domain: (1) biochemistry and metabolism, (2) ecophysiology, stress and adaptation, (3) uptake, transport and assimilation, (4) development, growth and differentiation, (5) photobiology and photosynthesis.
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