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Articles by Lavakush
Total Records ( 2 ) for Lavakush
  Lavakush , Janardan Yadav and Jay Prakash Verma
  The Plant Growth Promoting Rhizobacteria (PGPR) can substantially reduce the chemical inputs in agriculture. Furthermore, the use of indigenous PGPR can be an added advantage since it can easily acclimatize to the natural conditions and enhanced the plant–microbe interactions. The objective of my research is screening, characterization and selection of effective PGPR for rice production. Eight efficient PGPR isolates were selected and identified as Pseudomonas aeruginosa strain BHUJY12 (HQ-236532), Pseudomonas putida strain BHUJY14 (HQ-236533), P. aeruginosa strain BHUJY16 (HQ-236535), Pseudomonas sp. strain BHUJY19 (HQ-236519), P. aeruginosa strain BHUJY22 (HQ-236541), P. putida strain BHUJY23 (HQ-236542), P. aeruginosa strain BHUJY24 (HQ-236543) and P. aeruginosa strain BHUJY25 (HQ-236544). The bacterial strains were recorded range from 115.94 to 228.71 μg mL-1 phosphate solubilization in Pikovskaya broth medium. Also pH of the medium was ranged from 6.77 to 4.65 and SI index of different isolates ranged from 2.28 to 4.23 on solid agar plate at 6 days of incubation. Indole-3-acetic acid (IAA) production was varied range from 12.19 to 22.91 μg mL-1 at 6 days incubation. PGPR strains were also showed the growth inhibition of Rhizoctonia solani at 3 and 6 days incubation. Among all the strains, BHUJY23 strain (Pseudomonas putida) was found maximum significant phosphorus solubilization and IAA production followed by strain BHUJY16. Therefore, the P. putida strain BHUJY23 was effective PGPR for rice production under Indo-Gangetic plain of Eastern Uttar Pradesh.
  Jay Prakash Verma , Janardan Yadav , Kavindra Nath Tiwari , Lavakush and Vimal Singh
  Rhizospheric soils of crop plants have more flora and fauna due to availability of more organic compound, macronutrient and micronutrient. Rhizobacteria that exert beneficial effects on plant growth and development are referred to as Plant Growth Promoting Rhizobacteria (PGPR). Plant growth promoting rhizobacteria is a group of free living soil bacteria, which have ability to promote growth and yield of crop plant by direct and indirect mechanism. PGPR is generally two type, one is colonies inside plant cells that called intracellular PGPR (iPGPR) and other colonies out side plant in rhizosphere that called extracellular PGPR (ePGPR). This review generally focused on direct and indirect mechanism of PGPR. Direct mechanism of plant growth promotion may involve the synthesis of substances by the bacterium or facilitation of the uptake of nutrients from the environment. The indirect mechanism of plant growth occurs when PGPR lessen or prevent the deleterious effects of plant pathogens on plants by production of inhibitory substances or by increasing the natural resistance of the host. The search for PGPR and investigation of their mode of action are increasing at a rapid use as commercial biofertilizers. The mode of action and practical application of PGPR in crop production are the major focus of this review.
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