Plant microbiome-an account of the factors that shape community composition and diversity

Plants live in association with diverse microorganisms, collectively called the microbiome. These microbes live either inside (endosphere) or outside (episphere) of plant tissues. Microbes play important roles in the ecology and physiology of plants. Significant progress has been made in revealing structure and dynamics of plant microbiome in the last few years. Various factors related to host, microbes as well as environment influence the community composition and diversity of plant microbiome. This review aimed to provide a general account of the factors (host, microbe and environment) that drive the microbial community composition in plant. First, we gave an overview of the aboveground and belowground plant microbiomes. Next, we discussed which host factors are involved in variation in plants followed by importance of microbe-microbe interactions and the elements of environment that influence composition and community structuring of plant microbiomes.