Soil yeasts exhibit an array of bene cial effects to plants viz., plant growth promotion, phosphate solubilization, nitrogen and sulphur oxidation, etc. Yeasts remain as poorly investigated group of microorganisms that represent an abundant and dependable source of bioactive/chemically novel compounds and potential bioinoculants. Hence this study holds the key concept of assessing the performance of soil yeasts with potential plant growth promoting ability in soil quality improvement. Sixteen soil yeast isolates with plant growth promoting traits were assessed for bio lm forming potential and ve potential soil yeast isolates were selected and identi ed through molecular technique. Soil incubation study was performed with these isolates to assess their impact on soil physical, chemical and biological properties. Due to inoculation of soil yeasts, notable changes were observed in soil physical, chemical and biological properties. Among the soil yeast isolates, Pichia kudriavzevii gave better results in soil incubation study.
Background: Arbuscular Mycorrhizal Fungi (AMF) and Rhizobium are beneficial plant partners exhibiting mutual association with crop plants. Conventional carrier based formulation has lesser population and limited shelf life. Present study was aimed to evaluate and to assess the shelf life in new formulation as well as in coated seeds under storage.Methods: Three experiments are conducted in this study. Population of Rhizobium and AM fungi spore count were assessed in newer seed coat formulation under room temperature storage. Secondly survival of these organisms on the coated seeds of blackgram and greengram were evaluated. In third experiment the coated seeds stored for different duration were evaluated for germination, growth and vigour index.Result: Rhizobial population was maintained at 1011 g-1 and AM spore load was 900-1000 spores g-1 up to one year of storage. AM spore count was also found sufficient up to 9 months of storage in coated seeds of both crops. Growth and vigour index were significantly enhanced in inoculated plants over uninoculated control. From the study, it was evident that these formulations can be stored upto one year at room temperature without any loss in viable count and can be used for seed coating.
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