多粘类芽孢杆菌(P.多粘菌)是类芽孢杆菌属的成员,它是一个杆状的,孢子形成革兰氏阳性细菌。多粘菌是许多代谢活性物质的来源,包括多肽,挥发性有机化合物,植物激素,水解酶,胞外多糖(EPS),等。由于它产生的化合物种类繁多,P.polymyxa已被广泛研究为植物生长促进细菌,通过改善大气中的N固定和增强土壤中磷的溶解和铁的吸收,为植物提供了直接的益处。和植物激素的生产。在多粘菌的代谢物中,EPS展示了许多活动,例如,抗氧化剂,免疫调节,抗肿瘤和许多其他。EPS在食品中具有多种应用,农业,环境保护。特别是,在可持续农业领域,P.polymyxaEPS可以作为生物膜定植微生物,也可以作为根际植物根部的营养槽。因此,本文将对多粘菌EPS的各个方面的进展进行全面综述,包括生产,提取,结构,生物合成,生物活性和应用,等。为今后多粘菌EPS的研究提供了方向。
Paenibacillus polymyxa (P. polymyxa) is a member of the genus Paenibacillus, which is a rod-shaped, spore-forming gram-positive bacterium. P. polymyxa is a source of many metabolically active substances, including polypeptides, volatile organic compounds, phytohormone, hydrolytic enzymes,
exopolysaccharide (EPS), etc. Due to the wide range of compounds that it produces, P. polymyxa has been extensively studied as a plant growth promoting bacterium which provides a direct benefit to plants through the improvement of N fixation from the atmosphere and enhancement of the solubilization of phosphorus and the uptake of iron in the soil, and phytohormones production. Among the metabolites from P. polymyxa, EPS exhibits many activities, for example, antioxidant, immunomodulating, anti-tumor and many others. EPS has various applications in food, agriculture, environmental protection. Particularly, in the field of sustainable agriculture, P. polymyxa EPS can be served as a biofilm to colonize microbes, and also can act as a nutrient sink on the roots of plants in the rhizosphere. Therefore, this paper would provide a comprehensive
review of the advancements of diverse aspects of EPS from P. polymyxa, including the production, extraction, structure, biosynthesis, bioactivity and applications, etc. It would provide a direction for future research on P. polymyxa EPS.