UMK-PPS3, a locally isolated rhizobacteria as a plant booster

Rhizobacteria are bacteria that inhabit the plant rhizosphere and can promote plant growth by helping plants obtain essential nutrients and plant growth regulators via several mechanisms, including solubilization of insoluble phosphate in the soil, fixation of atmospheric nitrogen suitable for plant uptake, and production of phytohormone such as indole-3-acetic acid (IAA). UMK-PPS3 is our local rhizobacteria isolated from the paddy rhizosphere. This strain was identified as having the highest similarity to Frateuria aurantia which is well known as potassium solubilizing and mobilizingbacteria. We carried out several tests and assays including phosphate solubilization index (PSI) test, vanadate molybdate assay, Salkowski assay, and phytase assay to determine the plant growth- promoting activity. Besides, in vitro seed vigour index test and pot study were carried out to study the effect of UMK-PPS3 as plant booster. We discovered that this strain is able to solubilize insoluble phosphate and surprisingly even higher than previous study on rhizobacteria. Other than that, this isolate can fix atmospheric nitrogen, and produce a substantial amount of phytohormone and phytase enzyme. The inoculation of UMK-PPS3 has demonstrated an overall improvement in plant growth and germination rates, indicating that this bacterial isolate has immense potential as a plant booster. Thus, UMK-PPS3 is suitable to be applied as a plant booster as well as an environmental friendly, and cost-effective biofertilizer.