Evaluation of plant growth promoting potential of four rhizobacterial species for indigenous system
来源期刊：中南大学学报(英文版)2013年第1期
论文作者：Mokone Peter Hou Babalola Olubukola Oluranti
文章页码：164 - 171
Key words：Ewingella americana; microbial inoculants; PGPR; Pseudomonas spp; screening; Vibrio fluvialis
Abstract: The aim of this work was to see whether Pseudomonas putida NWU12, Pseudomonas fluorescence NWU65, Vibrio fluvialis NWU37 and Ewingella americana NWU59 are beneficial to plants and are able to promote plant growth and development when inoculated as plant growth-promoting rhizobacteria (PGPR). The four rhizobacteria were tested in vitro for PGPR activities and on spinach and pepper in pot experiments. The inoculants are all positive for ammonia (NH3), catalase, hydrogen cyanide (HCN), phosphate solubilization and siderophore production. Among the inoculants, E. americana NWU59 is oxidase negative. P. putida NWU12 and P. fluorescence NWU65 are producing indole-3-acetic acid (IAA). The inoculants exhibit some PGPR activities and thus tested in the screen-house. Treatments are control (water) and the four inoculants. Rhizobacterial inoculants increase spinach (17.14% - 21.43%) and pepper (15.0% - 37.5%) plant heights over the control. Such inoculants have the potential of improving plant yield components and may be used as biofertilizer.
Mokone Peter Hou, Babalola Olubukola Oluranti
(Department of Biological Sciences, Faculty of Agriculture, Science and Technology,
North-West University, Private Bag X2046, Mmabatho 2735, South Africa)
Abstract:The aim of this work was to see whether Pseudomonas putida NWU12, Pseudomonas fluorescence NWU65, Vibrio fluvialis NWU37 and Ewingella americana NWU59 are beneficial to plants and are able to promote plant growth and development when inoculated as plant growth-promoting rhizobacteria (PGPR). The four rhizobacteria were tested in vitro for PGPR activities and on spinach and pepper in pot experiments. The inoculants are all positive for ammonia (NH3), catalase, hydrogen cyanide (HCN), phosphate solubilization and siderophore production. Among the inoculants, E. americana NWU59 is oxidase negative. P. putida NWU12 and P. fluorescence NWU65 are producing indole-3-acetic acid (IAA). The inoculants exhibit some PGPR activities and thus tested in the screen-house. Treatments are control (water) and the four inoculants. Rhizobacterial inoculants increase spinach (17.14% - 21.43%) and pepper (15.0% - 37.5%) plant heights over the control. Such inoculants have the potential of improving plant yield components and may be used as biofertilizer.
Key words:Ewingella americana; microbial inoculants; PGPR; Pseudomonas spp; screening; Vibrio fluvialis
