Phosphate dissolving capability and the affect of phosphate-dissolving bacteria in the rhizosphere on Sorghum bicolor

doi:10.11686/cyxb20140633

Abstract

Abstract: Phosphorus is the second of the most necessary elements for plant growth.The phosphorus nutrients needed by plants are mainly sourced from rhizospheric soil, and phosphorus deficiency in the soil is an important limiting factor for agricultural production in many developing countries. Some micro-organisms can convert insoluble phosphate to soluble forms and research on such organisms therefore has considerable practical significance. Five bacterial strains were screened from Mengjinna inorganic mediums. The phosphate-solubilizing characteristics and IAA secretion ability of these strains of bacteria were studied using both the Molybdenum antimony resistance colorimetric method and Salkowski colorimetric method. There were notable differences in the micro-organisms’ phosphate dissolving capability. Phosphate-dissolving capability was 107.26-233.95 μg/mL. All the strains had the ability to produce IAA and IAA capability was 15.23-27.79 μg/mL. In comparison with the control, every strain showed significant benefits to Sorghum bicolor height, stem diameter and dry weight. In summary, strains WD₅₁ and WD₂₀ showed strong capability for phosphate dissolving and IAA secretion and could be used as potential strains for biofertilizer manufacture.

CLC Number:

S514.06

LEI Xue-jun,WU Yi,HUANG Xin,CAI Jian-bo,LI Zhuo,WU Lin-shi. Phosphate dissolving capability and the affect of phosphate-dissolving bacteria in the rhizosphere on Sorghum bicolor[J]. Acta Prataculturae Sinica, 2014, 23(6): 274-278.

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