Plant Grafting Shapes Complexity and Co-occurrence of Rhizobacterial Assemblages.

Plant Grafting Shapes Complexity and Co-occurrence of Rhizobacterial Assemblages.
Microb Ecol. 2020 Jun 08;:
Authors: Ruan Y, Wang T, Guo S, Ling N, Shen Q
Abstract
Grafting is a basic technique which is widely used to increase yield and enhance biotic and abiotic stress tolerance in plant production. The diversity and interactions of rhizobacterial assemblages shaped by grafting are important for the growth of their hosts but remain poorly understood. To test the hypothesis that plant grafting shapes complexity and co-occurrence of rhizobacterial assemblage, four types of plants, including ungrafted bottle gourd (B), ungrafted watermelon (W), grafted watermelon with bottle gourd rootstock (W/B), and grafted bottle gourd with watermelon rootstock (B/W), were cultivated in two soil types in a greenhouse, and the rhizosphere bacterial communities were analyzed by 16S rRNA gene high-throughput sequencing. Both the soil type and grafting significantly influenced the bacterial community composition. Grafting increased bacterial within-sample diversity in both soils. Core enriched operational taxonomic units (OTUs) in the W/B rhizosphere compared with the other three treatments (B, W, and B/W) were mainly affiliated with Alphaproteobacteria, Deltaproteobacteria, and Bacteroidetes, which are likely related to methanol oxidation, methylotrophy, fermentation, and ureolysis. Co-occurrence network analysis proved that grafting increased network...

Source: Microbial Ecology - June 7, 2020 Category: Microbiology Authors: Ruan Y, Wang T, Guo S, Ling N, Shen Q Tags: Microb Ecol Source Type: research