Camaille Manon, Fabre Nicolas, Clément Christophe, Ait Barka Essaid
Unité de Recherche Résistance Induite et Bioprotection des Plantes-EA 4707-USC INRAE 1488, Moulin de la Housse-Bâtiment 18, Université de Reims Champagne-Ardenne, BP 1039, CEDEX 2, 51687 Reims, France.
Agro-Industrie Recherches et Développements (ARD), Bazancourt Road, 51110 Pomacle, France.
Microorganisms. 2021 Mar 26;9(4):687. doi: 10.3390/microorganisms9040687.
In the coming century, climate change and the increasing human population are likely leading agriculture to face multiple challenges. Agricultural production has to increase while preserving natural resources and protecting the environment. Drought is one of the major abiotic problems, which limits the growth and productivity of crops and impacts 1-3% of all land.To cope with unfavorable water-deficit conditions, plants use through sophisticated and complex mechanisms that help to perceive the stress signal and enable optimal crop yield are required. Among crop production, wheat is estimated to feed about one-fifth of humanity, but faces more and more drought stress periods, partially due to climate change. Plant growth promoting rhizobacteria are a promising and interesting way to develop productive and sustainable agriculture despite environmental stress. The current review focuses on drought stress effects on wheat and how plant growth-promoting rhizobacteria trigger drought stress tolerance of wheat by highlighting several mechanisms. These bacteria can lead to better growth and higher yield through the production of phytohormones, osmolytes, antioxidants, volatile compounds, exopolysaccharides and 1-aminocyclopropane-1-carboxylate deaminase. Based on the available literature, we provide a comprehensive review of mechanisms involved in drought resilience and how bacteria may alleviate this constraint.
在即将到来的世纪，气候变化和人口增长可能使农业面临多重挑战。农业生产必须在保护自然资源和环境的同时增加产量。干旱是主要的非生物问题之一，它限制了作物的生长和生产力，影响着全球1%至3%的土地。为应对不利的缺水状况，植物会通过复杂精妙的机制来感知胁迫信号，从而实现作物产量的最优化。在作物生产中，小麦养活了约五分之一的世界人口，但由于气候变化等原因，它正面临越来越多的干旱胁迫期。尽管存在环境胁迫，植物促生根际细菌仍是发展高产、可持续农业的一种有前景且有趣的途径。本综述聚焦于干旱胁迫对小麦的影响，以及植物促生根际细菌如何通过多种机制增强小麦对干旱胁迫的耐受性。这些细菌可通过产生植物激素、渗透调节物质、抗氧化剂、挥发性化合物、胞外多糖和1-氨基环丙烷-1-羧酸脱氨酶，促进小麦更好地生长并提高产量。基于现有文献，我们全面综述了与干旱抗性相关的机制，以及细菌如何缓解这一限制因素。
