MICROORGANISM UTILIZING POORLY SOLUBLE PHYTATE IN SOIL, PHYTASE PRODUCED BY THE SAME AND UTILIZATION THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a microorganism growable by using a poorly soluble phytate in soil as only one carbon source and phosphorus source and to provide various methods for utilizing the microorganism.

SOLUTION: Lupinus albus L. cv. kievskij mutant exhibiting high low-phosphorus tolerance was cultivated in soil subjected to nutrient restriction in order to analyze interaction between a plant and the microorganism from the plant nutritional standpoint under inferior environmental conditions. A microorganism was screened with phytin as only one carbon source and phosphorus source from the soil. As a result, the existence of a microorganism growable by using aluminum phytate which is a poorly soluble phosphorus compound in soil as the only one carbon source and phosphorus source was found out. Thereby, an accomplishment was achieved. The microorganism can be utilized as a soil additive for enriching the soil, a plant growth promoter promoting the growth of a plant, a soil pollution inhibitor, etc.

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