链霉菌的功能及其在农业上的应用

Function of Streptomyces and Their Application in Agriculture

摘要:

链霉菌是自然界中大量存在的一类微生物，具有多种多样的功能，其基内菌丝多核有间隔，气生菌丝上附着孢子链，从孢子萌发到孢子释放完成整个生命周期。链霉菌以菌丝体的形式定殖于多种植物体的根、茎、叶等部位而发挥功能，能分泌多种具有促进植物生长与生物防治功能的代谢物。对近几年链霉菌在提升植物营养吸收、促进植物生长、增强植物应对逆境能力、改善土壤结构、恢复污染水体等方面的研究进行了综述，并对今后链霉菌的研究方向和应用前景进行了展望。

Abstract:

Streptomyces widely exist in nature with various functions. Their basal hyphae are multi-nucleated with septa, and spore chains are attached to aerial hyphae. The life cycle is completed from spore germination to spore release. Streptomyces are able to colonize the roots, stems, leaves and other parts of plants. They secrete various metabolites which play important roles in plant growth promotion and biological control. The functions of Streptomyces mainly focused on the enhancement of plant nutrient uptake, promotion of plant growth, and increase of the ability of plants coping with biotic and abiotic stresses were reviewed. The future research directions and application were also prospected.