The role of drought response genes and plant growth promoting bacteria on plant growth promotion under sustainable agriculture: A review

IF 6.1 1区生物学 Q1 MICROBIOLOGY

Microbiological research Pub Date : 2024-07-04 DOI:10.1016/j.micres.2024.127827

Ashok Kumar , Sai Prakash Naroju , Neha Kumari , Shivani Arsey , Deepak Kumar , Dilasha Fulchand Gubre , Abhrajyoti Roychowdhury , Sachin Tyagi , Pankaj Saini

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引用次数: 0

Abstract

Drought is a major stressor that poses significant challenges for agricultural practices. It becomes difficult to meet the global demand for food crops and fodder. Plant physiology, physico-chemistry and morphology changes in plants like decreased photosynthesis and transpiration rate, overproduction of reactive oxygen species, repressed shoot and root shoot growth and modified stress signalling pathways by drought, lead to detrimental impacts on plant development and output. Coping with drought stress requires a variety of adaptations and mitigation techniques. Crop yields could be effectively increased by employing plant growth-promoting rhizobacteria (PGPR), which operate through many mechanisms. These vital microbes colonise the rhizosphere of crops and promote drought resistance by producing exopolysaccharides (EPS), 1-aminocyclopropane-1-carboxylate (ACC) deaminase and phytohormones including volatile compounds. The upregulation or downregulation of stress-responsive genes causes changes in root architecture due to acquiring drought resistance. Further, PGPR induces osmolyte and antioxidant accumulation. Another key feature of microbial communities associated with crops includes induced systemic tolerance and the production of free radical-scavenging enzymes. This review is focused on detailing the role of PGPR in assisting plants to adapt to drought stress.

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干旱响应基因和植物生长促进菌在可持续农业中促进植物生长的作用：综述。

干旱是对农业生产方式构成重大挑战的主要压力源。要满足全球对粮食作物和饲料的需求变得十分困难。植物的生理、物理化学和形态会发生变化，如光合作用和蒸腾速率降低、活性氧生成过多、嫩枝和根芽生长受抑制以及干旱改变了胁迫信号通路，从而对植物的生长发育和产量产生不利影响。应对干旱胁迫需要各种适应和缓解技术。利用通过多种机制发挥作用的植物生长促进根瘤菌（PGPR），可以有效提高作物产量。这些重要的微生物定植于作物的根瘤层，通过产生外多糖（EPS）、1-氨基环丙烷-1-羧酸（ACC）脱氨酶和植物激素（包括挥发性化合物）来促进作物的抗旱性。应激反应基因的上调或下调会导致根系结构发生变化，从而获得抗旱性。此外，PGPR 还能诱导渗透溶质和抗氧化剂的积累。与作物相关的微生物群落的另一个主要特征包括诱导系统耐受性和产生自由基清除酶。本综述将重点详细介绍 PGPR 在帮助植物适应干旱胁迫方面的作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Microbiological research 生物-微生物学

CiteScore

10.90

自引率

6.00%

发文量

249

审稿时长

29 days

期刊介绍： Microbiological Research is devoted to publishing reports on prokaryotic and eukaryotic microorganisms such as yeasts, fungi, bacteria, archaea, and protozoa. Research on interactions between pathogenic microorganisms and their environment or hosts are also covered.