Signaling in the Rhizosphere for Better Plant and Soil Health

The rhizosphere is a hot spot for bidirectional plant-microbe interaction that occurs through the exchange of signals between both the partners. Due to the sessile nature of plants, it utilizes crying-for-help strategies to combat various biotic and abiotic challenges by producing a wide array of root exudates and root volatile compounds in the rhizosphere. Whereas microbe releases various microbial volatile organic compounds (MVOCs), phytohormones, quorum-sensing compounds, and establish a relationship with plants. Such signal compounds determine the structure, abundance, and richness of the rhizomicrobiome (rhizobiome). We know the role of specific plant-microbe interactions, e.g., Rhizobium and legumes, mycorrhizae with roots of higher plants, and some plant growth-promoting rhizobacteria (PGPR) and plant growth-promoting fungi (PGPF) with plants.