Arbuscular mycorrhizal fungi and other beneficial microorganisms in the rhizosphere soil of garcinia lanceifolia (g.don) roxb.

A study was undergone to explore the soil beneficial microorganisms in rhizosphere soils of Garcinia lanceifolia (D.Don) Roxb. Rhizosphere soil samples were collected from ten different villages of Jorhat, Nagaon, Golaghat, Sivasagar and Dima Hasao districts, Assam. Beneficial microorganisms in rhizosphere soils of Garcinia lanceifolia were cultured, isolated and identified during 2016-17. The study exposed that Garcinia lanceifolia has Arbuscular mycorrhizal fungi (AMF) association in roots. Average root colonization of the plant species was recorded for 63.4 with a range of 50- 96 per cent depending on the place of collection. AMF spores were isolated from rhizosphere soils and identified tentatively up to the genus. AM fungi, nitrogen-fixing bacteria, phosphate solubilizing microorganism (PSM) and plant growth promoting rhizobacteria (PGPR) have been reported as useful for sustaining soil health and plant survival. Twenty-one (21) types of AMF spores were isolated from Garcinia lanceifolia rhizosphere soils belongs to eight (8) genus of 5 families of Glomeromycota i.e. Glomus, Acaulospora, Diversispora, Steptoglomus, Funneliformis, Rhizophagus, Entrophospora, and Gigaspora. Apart from arbuscular mycorrhizal fungi some other beneficial bacteria such as Fluorescent Pseudomonas and Bacillus spp were isolated from different culture media and identified. Some PSM, phytostimulator and decomposer microfungi such as Penicillium, Aspergillus, Trichoderma, Mucor etc were also isolated from rhizosphere soils of the plant species.