National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Zinc (Zn) is the most effective micronutrient and Zn solubilization is triggered by the production of organic acids for the optimum growth of plants. An investigation was carried out on organic acid production profiling during zinc solubilization by zinc solubilizing bacterial (ZSB) strains (B. aryabhattai, Pseudomonas taiwenensis and Bacillus sp. PAN-TM1) which were obtained from the Culture Collection Centre, Microbiology Laboratory, SSAC, ICAR-IIHR, Bengaluru, India. Eleven organic acids profile was estimated by HPLC in different zinc sources viz., zinc oxide (ZnO), zinc carbonate (ZnCO3) and zinc phosphate [Zn3(PO4)2] by the three ZSB isolates which revealed that lactic acid (9128µg.ml-1, in ZnCO3-15days), malonic acid [9456µg.ml-1, in Zn3(PO4)2-10days], malic acid (6949µg.ml-1, in Zn3(PO4)2-10days), citric acid [8887µg.ml-1, in Zn3(PO4)2-5days] and succinic acid [9005µg.ml-1, in ZnCO3-10days] are the major organic acids produced by the isolates used in the study. Among the ZSB strain, B. aryabhattai produced all most all the organic acids during zinc solubilization as compared to P. taiwenensis and Bacillus sp. PAN-TM1. The above findings clearly indicated that the organic acids secretions by Bacillus and Pseudomonas will vary depend on the substrate of Zn minerals.
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