ICAR-National Bureau of Agriculturally Important Microorganisms (NBAIM), Uttar Pradesh, Mau, 275103, India.
ICAR-Indian Institute of Wheat and Barley Research (IIWBR), Karnal, 132001, India.
World J Microbiol Biotechnol. 2020 Jan 29;36(2):26. doi: 10.1007/s11274-020-2804-9.
Salinity stress is one of the key constraints for sustainable crop production. It has gained immense importance in the backdrop of climate change induced imbalanced terrestrial water budgets. The traditional agronomic approaches and breeding salt-tolerant genotypes have often proved insufficient to alleviate salinity stress. Newer approaches like the use of bacterial endophytes associated with agricultural crops have occupied center place recently, owing to their advantageous role in improving crop growth, health and yield. Research evidences have revealed that bacterial endophytes can promote plant growth by accelerating availability of mineral nutrients, helping in production of phytohormones, siderophores, and enzymes, and also by activating systemic resistance against insect pest and pathogens in plants. These research developments have opened an innovative boulevard in agriculture for capitalizing bacterial endophytes, single species or consortium, to enhance plant salt tolerance capabilities, and ultimately lead to translational refinement of crop-production business under salty environments. This article reviews the latest research progress on the identification and functional characterization of salt tolerant endophytic bacteria and illustrates various mechanisms triggered by them for plant growth promotion under saline environment.
盐胁迫是可持续作物生产的关键限制因素之一。在气候变化导致陆地水预算失衡的背景下，盐胁迫问题变得尤为重要。传统的农业方法和培育耐盐基因型往往不足以缓解盐胁迫。最近，一些新的方法，如利用与农业作物相关的细菌内生菌，因其在促进作物生长、健康和产量方面的有利作用而占据了中心位置。研究证据表明，细菌内生菌可以通过加速矿物质营养物质的可用性、帮助产生植物激素、铁载体和酶，以及激活植物对昆虫和病原体的系统抗性，来促进植物生长。这些研究进展为农业利用细菌内生菌、单一物种或群落开辟了一条创新途径，以增强植物的耐盐能力，并最终导致在盐环境下对作物生产业务进行转化和完善。本文综述了耐盐内生细菌的鉴定和功能特征的最新研究进展，并说明了它们在盐环境下触发的各种促进植物生长的机制。
