Tsegaye Zerihun, Alemu Tesfaye, Desta Feleke Adey, Assefa Fassil
Department of Microbial, Cellular and Molecular Biology, College of Natural and Computational Sciences, Addis Ababa University, Addis Ababa, Ethiopia.
Microbial Biodiversity Directorate, Ethiopian Biodiversity Institute, Addis Ababa, Ethiopia.
Front Microbiol. 2022 Oct 21;13:896770. doi: 10.3389/fmicb.2022.896770. eCollection 2022.
Inoculation of plant growth-promoting rhizobacteria (PGPR) improves the growth, yield, and plant nutrient uptake, as well as rhizosphere fertility, without harming the environment and human health. This study aimed to examine the effect of either individual or consortium of PGP bacterial inoculation on the growth, yield, and grain nutrient uptake of teff varieties. Three potential PGPR strains (i.e., , , and ) were used for this study. Field evaluation was carried out in RCBD with 5 treatments. Highly significant ( < 0.001) differences were observed among treatments for plant height (PH), panicle length (PL), number of the total spike (NTS), shoot dry weight (SDW), grain yield (GY), and straw yield (SY). There was also teff variety that significantly ( < 0.01) affects PL, SDW, and SY. However, the interaction effect of the two factors (treatment*variety) did not significantly influence teff agronomic traits and grain nutrient uptake. The highest PH (133.5 cm), PL (53.2), NTS (30.9), SDW (18.1 t/ha), SY (10.7 t/ha), and GY (2.7 t/ha) were observed on Dukem variety (Dz-01-974) inoculated with PGPR consortium. Wherein 2.2 fold increase was observed in grain yield per hectare over the control. Inoculation of PGPR consortium showed better performance in promoting plant growth, yield, and grain nutrient uptake of teff varieties compared with the individual PGP bacterial application, and PGPR consortium could be used as inoculants to enhance teff production and productivity.
接种植物促生根际细菌（PGPR）可改善植物生长、产量、养分吸收以及根际肥力，且不危害环境和人类健康。本研究旨在考察PGP细菌单独接种或联合接种对画眉草品种生长、产量及籽粒养分吸收的影响。本研究使用了三种潜在的PGPR菌株（即 、 和 ）。在随机区组设计中进行了5种处理的田间评估。在株高（PH）﹑穗长（PL）﹑总穗数（NTS）﹑地上部干重（SDW）﹑籽粒产量（GY）和秸秆产量（SY）方面，各处理间观察到极显著（ < 0.001）差异。也有画眉草品种对PL、SDW和SY有显著（ < 0.01）影响。然而，两个因素（处理*品种）的交互作用对画眉草农艺性状和籽粒养分吸收没有显著影响。接种PGPR联合菌剂的Dukem品种（Dz - 01 - 974）的PH最高（133.5厘米）、PL（53.2）、NTS（30.9）、SDW（18.1吨/公顷）﹑SY（10.7吨/公顷）和GY（2.7吨/公顷）。其中，每公顷籽粒产量比对照增加了2.2倍。与单独施用PGP细菌相比，接种PGPR联合菌剂在促进画眉草品种的植物生长、产量和籽粒养分吸收方面表现更好，且PGPR联合菌剂可用作接种剂以提高画眉草的产量和生产力。
