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Chilean Journal of Agricultural Research
Instituto de Investigaciones Agropecuarias, INIA
ISSN: 0718-5820
EISSN: 0718-5839
Vol. 73, No. 3, 2013, pp. 275-281
Bioline Code: cj13039
Full paper language: English
Document type: Research Article
Document available free of charge

Chilean Journal of Agricultural Research, Vol. 73, No. 3, 2013, pp. 275-281

 en Phosphate solubilizing bacteria: Assessment of their effect on growth promotion and phosphorous uptake of mung bean ( Vigna radiata check for this species in other resources [L.] R. Wilczek)
Charana Walpola, Buddhi & Yoon, Min-Ho

Abstract

The aim of this work was to isolate phosphate solubilizing bacteria (PSB) and assess their effect on the growth of mung bean ( Vigna radiata check for this species in other resources [L.] R. Wilczek) plants. Of 31 isolated PSB strains, two efficient strains, identified as Pantoea agglomerans check for this species in other resources (PSB-1) and Burkholderia anthina check for this species in other resources (PSB-2), were employed in further studies. Maximum P solubilization (720.75 μg mL-1) was recorded from the cultures co-inoculated with P. agglomerans and B. anthina. A strong positive correlation was found between pH and soluble P concentration in the medium, as well as between titratable acidity and P solubilization. Both strains under greenhouse conditions remarkably enhanced shoot and root length, shoot and root dry matter, and P uptake of mung bean plants. Growth was found to be further improved by adding tricalcium phosphate (TCP) with PSB inoculation. Co-inoculation of both PSB strains and adding TCP exhibited the highest growth performances and P uptake of mung bean plants; this implies that their applicability as a promising alternative to minimize the P problem in agricultural soils.

Keywords
Burkholderia anthina; co-inoculation; Pantoea agglomerans; phosphate solubilization; tricalcium phosphate; Vigna radiata

 
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