Laboratory of Biochemistry, Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, 13 Prospekt Entuziastov, Saratov 410049, Russian Federation.
Curr Microbiol. 2013 May;66(5):481-6. doi: 10.1007/s00284-012-0297-y. Epub 2013 Jan 12.
We examined the ability of several Paenibacillus polymyxa strains to colonize wheat roots and the ability of P. polymyxa exoglycans to induce root hair deformation. For the first time, exopolysaccharides isolated from P. polymyxa were found to produce, with different intensities, various morphological changes in the root hairs of wheat seedlings, which are some of the earliest responses of plants to bacteria in the surrounding milieu. P. polymyxa 1465, giving the highest exopolysaccharide yield and the highest viscosity of aqueous exopolysaccharide solutions, was best able to colonize wheat seedling roots, and its exopolysaccharide proved to be the best in producing root hair deformation. It is suggested that P. polymyxa exoglycans have an active role in the establishment of plant-microbe associations.
我们研究了几种多粘类芽孢杆菌菌株定植小麦根的能力，以及多粘类芽孢杆菌胞外聚糖诱导根毛变形的能力。首次发现，从多粘类芽孢杆菌中分离得到的胞外多糖能够不同程度地诱导小麦幼苗根毛产生各种形态变化，这是植物对周围环境中细菌的最早反应之一。多粘类芽孢杆菌 1465 产生的胞外多糖产量最高，水相胞外多糖溶液的黏度也最高，最能定植小麦幼苗根，其胞外多糖在产生根毛变形方面效果最好。这表明多粘类芽孢杆菌胞外聚糖在植物-微生物共生体的建立中具有积极作用。
