The Ecological Significance of Plant Growth Promoting Rhizobacteria in Tropical Soil Kalimantan: A Narrative Review

Abstract

The diversity of flora in Kalimantan influences the presence of microbe-associated with rhizosphere on their activities and functions in ecosystems. However, abiotic stress such as acidification, drought, and toxic soil residues negatively impacted soil health and plant growth in some regions of Kalimantan's soil. The Plant-growth promoting rhizobacteria (PGPR) can alternate by producing phytohormone, solubilizing phosphate, nitrogen fixation, and biofilm production. Rhizobacteria will be ben-eficial for plant growth, soil aggregation, and bioremediation. Those benefit of rhizobacteria is essential to investigate. However, the study of the role of plant-rhizo-bacteria interaction in soil Kalimantan was limited. Therefore, this review focused on the presence of indigenous rhizobacteria and their mechanism to adapt and be tolerant in harsh environments.