Phosphate solubilizing bacteria from subtropical soil and their tricalcium phosphate solubilizing abilities

TL;DR: In this article, two strains of bacteria (Bacillus thuringenesis and Lysinobaccillus fusiformis P0B28) and a fungus (Aspergillus aculeatus P0F3) were the most effective strain solubilizing RP.

Abstract: Abstract This study was conducted to characterize different plant growth promoting Pseudomonas strains isolated from wet temperate zones of Himachal Pradesh and two best effective plant growth promoting P. aeruginosa strains An-14-Mg and An-15-Mg were tested under field conditions to evaluate their growth promotional effect on apple crop. Maximum production of all the plant growth promoting traits were shown by two Pseudomonas isolate An-14-Mg and An-15-Mg. Maximum phosphate solubilization was shown by An-15-Mg (46 mm) whereas highest siderophore units (SU) were recorded in An-14-Mg (71.23%SU) followed by An-15-Mg (70.12%SU) which were statistically at par with each other. Highest IAA production (95 µg/ml), HCN (++++) and ammonia (++++) production was observed again in Pseudomonas isolate An-15-Mg. Both the strains exhibited 99% level of similarity with P. aeruginosa. The presence of An-14-Mg, An-15-Mg alone and consortium were tested under field conditions to study their effect on percent survival of apple rootstocks, plant height and number of shoots up to 3 years period. Maximum increase in percent survival, plant height, number of shoots, chlorophyll content and available NPK content of soil were observed in consortial bioformulation after 3 years growth observed in apple plants. Both the P. aeruginosa strains were reported first time as plant growth promoter with apple tree, therefore can be used as biofertilizer in apple crop of Himachal Pradesh.

TL;DR: In this paper, the authors evaluated the agronomic efficiency of 12 new phosphates obtained from partial acidulation (25 and 50% of total acidulation) of rocks phosphates (RPs) from Araxá (RPA), Bayóvar (RPB) and Morocco (RPM) containing pillarized clays or zeolites in their formulation, by means of evaluating the diffusion, solubilization and corn cultivation.

TL;DR: In this paper, the dynamics of soil phosphorus under different management practices for groundnut cultivation in calcareous Vertisols were analyzed. But the results were limited to groundnut only.

TL;DR: MEGA2 vastly extends the capabilities of MEGA version 1 by facilitating analyses of large datasets, enabling creation and analyses of groups of sequences, and expanding the repertoire of statistical methods for molecular evolutionary studies.

TL;DR: Genetic manipulation of phosphate-solubilizing bacteria to improve their ability to improve plant growth may include cloning genes involved in both mineral and organic phosphate solubilization, followed by their expression in selected rhizobacterial strains.