Identification of drought resistance of different wheat varieties at seedling stage and functional analysis of rhizosphere microorganisms
The drought resistance of 20 wheat varieties at seedling stage was assessed,and a comprehensive drought resistance index was calculated.The drought-resistant wheat variety'Hanzhongbai'was selected,and its rhizosphere microorganisms were isolated and identified,resulting in 50 bacterial strains.After screening for drought resistance,eight drought-resistant strains were identified,including two strains of Paenibacillus,two strains of Pseudomonas,two strains of Stenotrophomonas,one strain of Staphylococcus,and one strain of Paraclostridium.These eihgt drought-resistant strains were inoculated into the rhizosphere of the drought-sensitive wheat variety'Chinese Spring',and physiological parameters including plant height,root length,above-ground fresh and dry weights,and below-ground fresh and dry weights were measured under drought stress.The results showed that inoc-ulation with Paenibacillus significantly improved all four physiological parameters of'Chinese Spring'compared to the control group,with average plant height increasing by 5.71 cm,average root length by 2.28 cm,average fresh weight by 0.0371 g,and average dry weight by 0.0118 g.This indicated that Paenibacillus significantly improved the drought resistance of'Chinese Spring'wheat.Therefore,this study suggests that the microorganisms recruited by the drought-resistant variety'Hanzhongbai'under drought stress could enhance the drought resistance of the drought-sensitive'Chinese Spring'variety.Paenibacillus showed promise as a microbial agent for boosting crop yield and quality in arid regions.
wheatrhizosphere microorganismidentification of drought resistancePaenibacillus
万方数据
维普
