Assessment of Phosphate Solubilization and Indole Acetic Acid Production of Phosphate Solubilizing Bacteria Isolated from Acid Soils, Lampung, Indonesia

DOI

10.2991/absr.k.210621.080How to use a DOI?

Keywords

IAA production, pH changes, phosphate solubilize, ultisol

Abstract

Phosphorus is the main macronutrient required by plants for growth and development. Phosphorus in the soil in bonds with metals such as Al and Ca, especially in acid soils such as ultisols. This form of phosphate must be mineralized or dissolved using phosphate solubilizing bacteria. The ability to dissolve phosphate also correlates with the production of Indole Acetic Acid (IAA), which can increase plant growth. This study aims to assess the ability of phosphate dissolution and IAA production of three phosphate solubilizing bacteria (EF.NAP 5, EF.NAP 7, and EF.NAP 10) which have been isolated from acid soils, Lampung. The method used was the clear zone test for bacterial isolates, phosphate solubility, and measurement of IAA production during the phosphate solubility process. EF.NAP 7, EF.NAP 5 and EF.NAP 10 isolates had phosphate dissolution indexes of 0.986 (6th day), 0.828 (7th day) and 0.789 (3rd day), respectively. EF.NAP 7 isolate (392.87 mg/L) was able to dissolve phosphate better than EF.NAP 10 (311 mg/L) and EF.NAP 5 (213.37 mg/L). The pH conditions on the highest phosphate solubility were EF.NAP 7 (4.94), EF.NAP 10 (4.19) and EF.NAP 5 (6.01), respectively. The three isolates of phosphate solubilizing bacteria were able to produce IAA during the phosphate dissolving process in the Liquid Pikovskaya medium without the addition of Tryptophan with IAA concentrations of EF.NAP 5 (12.5 mg/L), EF.NAP 7 (8.0 mg/L) and EF.NAP 10 (8.5 mg/L), respectively.

Copyright

© 2021, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Muhammad Asril
AU  - Yuni Lisafitri
AU  - Ainin Niswati
AU  - Suskandini Ratih Dirmawati
AU  - Rismawati
AU  - Ika Agus Rini
AU  - Indah Oktaviani
PY  - 2021
DA  - 2021/06/23
TI  - Assessment of Phosphate Solubilization and Indole Acetic Acid Production of Phosphate Solubilizing Bacteria Isolated from Acid Soils, Lampung, Indonesia
BT  - Proceedings of the 3rd KOBI Congress, International and National Conferences (KOBICINC 2020)
PB  - Atlantis Press
SP  - 469
EP  - 477
SN  - 2468-5747
UR  - https://doi.org/10.2991/absr.k.210621.080
DO  - 10.2991/absr.k.210621.080
ID  - Asril2021
ER  -