Zhu Yanlei, She Xiaoping
a College of Life Sciences, Shaanxi Normal University, Xi'an 710119, Shaanxi, China.
b College of Life Sciences, Xinjiang Normal University, Urumqi 830054, Xinjiang, China.
Can J Microbiol. 2018 Apr;64(4):253-264. doi: 10.1139/cjm-2017-0529. Epub 2018 Jan 25.
The objective of this study was to assess the plant-growth-promoting abilities of 45 endophytic bacterial isolates from Ammodendron bifolium through physiological characteristics detection and endophytic bacteria-plant interaction. Each of these isolates exhibited 1 or more plant-growth-promoting traits, but only 11 isolates belonging to the genera Bacillus, Staphylococcus, and Kocuria were capable of promoting seed germination and radicle growth. These results together with the results of the correlation analysis revealed that the completion of seed germination may not be due to IAA production, phosphate solubilization, pellicle formation, and ACC deaminase, protease and lipase production by endophytic bacteria, but may be closely related to amylase and cellulase production. Further, endophytic bacterial isolates with plant-growth-promoting traits may also provide beneficial effects to host plants at different growth stages. Thus, these results are of value for understanding the ecological roles of endophytic bacteria in host plant habitats and can serve as a foundation for further studies of their potential in plant regeneration.
本研究的目的是通过生理特性检测和内生细菌与植物的相互作用，评估从二叶沙冬青中分离出的45株内生细菌的促植物生长能力。这些分离株均表现出1种或多种促植物生长特性，但只有属于芽孢杆菌属、葡萄球菌属和考克氏菌属的11株分离株能够促进种子萌发和胚根生长。这些结果与相关性分析结果共同表明，种子萌发的完成可能不是由于内生细菌产生吲哚-3-乙酸、溶解磷、形成菌膜以及产生ACC脱氨酶、蛋白酶和脂肪酶，而是可能与淀粉酶和纤维素酶的产生密切相关。此外，具有促植物生长特性的内生细菌分离株也可能在宿主植物的不同生长阶段提供有益作用。因此，这些结果对于理解内生细菌在宿主植物生境中的生态作用具有重要价值，并可为进一步研究其在植物再生中的潜力奠定基础。
