Evaluation of the plant growth promoting abilities of endophytic bacteria from the psammophyte Ammodendron bifolium
2017
Zhu, Yanlei | She, Xiaoping
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. 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 with amylase and cellulose 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.
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