Impact of Maize Genotype on the Characteristic of Rhizospheric Microbes

doi:10.11924/j.issn.1000-6850.2013-2546

Abstract

Abstract: This study aimed to explore the effects of different genotypes of maize (Zea mays L.) on the activity and community composition of rhizospheric microbes. Pot experiment for genotype‘Zhengdan No. 958’,‘Shandan No. 8806’,‘Zhongdan No. 909’, and’Nonghua No. 101’were carried out in a greenhouse. Plants were harvested at the flowering stage, and crop biomass and the characteristic of rhizospheric microbes were determined. The results showed that crop biomass,β-glucosidase activity, easily extractable glomalin-related soil protein (GRSP), total GRSP, and the biomass of gram-positive bacteria, gram-negative bacteria, and fungi in the rhizosphere increased following genotype:‘Zhengdan No. 958’＜‘Shandan No. 8806’＜‘Zhongdan No. 909’＜‘Nonghua No. 101’. The microbes inhabiting the rhizosphere of different genotypes had the differences in the abundances and components of phospholipid fatty acids. There were different structures of Arbuscular mycorrhizal fungal community in the rhizosphere of different genotypes. Crop biomass, especially shoot biomass, was positively and significantly correlated with most of microbial properties. The results suggested that the difference in the morphology among maize genotypes probably resulted in large differentiation in the activity and community composition of rhizospheric microbes.

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