Rakesh Singh *
Inter specific interaction between plant species is one of the factor responsible for the growth and development of plant species. Interaction between the plants has both beneficial and harmful effect on one or both the species. Grewia optiva is a widely grown fodder tree usually grown on boundaries of crop field. The plant having allelopathic effect on crop growth but its importance as a fodder tree cannot be ignored. The present investigation is carried out with PGPR Strains (Pseudomonas FP-11 and Bacillus BS-217/56) in alleviating allelochemical (biotic) stress of Grewia optiva (Bhimal) on Finger millet. Due to presence of Grewia optiva leaf extract there was inhibition in germination%, seedling fresh and dry weight, root length & shoot length and seedling length, of finger millet respectively as compared to control. This inhibition was recovered with PGPR treatment individual and combined of Pseudomonas FP-11 and Bacillus BS-217/56. The results indicated that the seeds inoculation with PGPR strains under Allelochemical (Biotic) stress (Grewia optaiva leaf extract) significantly improved Germination, plant growth, vigour and chlorophyll contents of leaf. The root length, shoot length, seedling length, seedling fresh weight, and seedling dry weight were also significantly increased by seeds treated with PGPR. The Plant-Growth Promoting Rhizobacteria (PGPR) (Pseudomonas FP-11 strain and Bacillus BS-217/56 strain combination) could alleviate allelopathic effect of Grewia optiva (Bhimal) on finger millet. Plant growth-promoting Rhizobacteria (PGPR) was observed replacing the use of chemicals in agriculture, horticulture practices. This is due to the emerging demand for minimizing harmful impacts and utilization of chemical products to the growing necessity of sustainable agriculture within a holistic apparition of development and to emphasize environmental protection.
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