Microbial Biotechnology Laboratory, Life Sciences Division, Institute of Advanced Study in Science and Technology, Guwahati, India.
Department of Molecular Biology and Biotechnology, Cotton University, Guwahati, India.
J Appl Microbiol. 2022 Oct;133(4):2314-2330. doi: 10.1111/jam.15734. Epub 2022 Aug 3.
Tea (Camellia sinensis (L) O. Kuntze) is a long-duration monoculture crop prone to several biotic (fungal diseases and insect pest) and abiotic (nutrient deficiency, drought and salinity) stress that eventually result in extensive annual crop loss. The specific climatic conditions and the perennial nature of the tea crop favour growth limiting abiotic factors, numerous plant pathogenic fungi (PPF) and insect pests. The review focuses on the susceptibility of tea crops to PPF/pests, drought, salinity and nutrient constraints and the potential role of beneficial actinobacteria in promoting tea crop health. The review also focuses on some of the major PPF associated with tea, such as Exobasidium vexans, Pestalotiopsis theae, Colletotrichum acutatum, and pests (Helopeltis theivora). The phylum actinobacteria own a remarkable place in agriculture due to the biosynthesis of bioactive metabolites that assist plant growth by direct nutrient assimilation, phytohormone production, and by indirect aid in plant defence against PPF and pests. The chemical diversity and bioactive significance of actinobacterial metabolites (antibiotics, siderophore, volatile organic compounds, phytohormones) are valuable in the agro-economy. This review explores the recent history of investigations in the role of actinobacteria and its secondary metabolites as a biocontrol agent and proposes a commercial application in tea cultivation.
茶（Camellia sinensis (L) O. Kuntze）是一种长生育期的单种作物，容易受到多种生物（真菌病害和昆虫）和非生物（养分缺乏、干旱和盐度）胁迫的影响，最终导致广泛的年度作物损失。特定的气候条件和茶树的多年生性质有利于生长限制的非生物因素、许多植物病原真菌（PPF）和昆虫。本综述重点介绍了茶树对 PPF/害虫、干旱、盐度和养分限制的敏感性，以及有益放线菌在促进茶树健康方面的潜在作用。本综述还重点介绍了一些与茶相关的主要 PPF，如 Exobasidium vexans、Pestalotiopsis theae、Colletotrichum acutatum 和害虫（Helopeltis theivora）。放线菌门由于生物活性代谢物的生物合成而在农业中占有重要地位，这些代谢物通过直接养分同化、植物激素的产生以及间接帮助植物抵御 PPF 和害虫来协助植物生长。放线菌代谢物（抗生素、铁载体、挥发性有机化合物、植物激素）的化学多样性和生物活性意义在农业经济中很有价值。本综述探讨了放线菌及其次生代谢物作为生物防治剂的作用的最新研究历史，并提出了在茶叶种植中的商业应用。
