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Occurrence of Phosphate‐dissolving Micro‐organisms in the Rhizosphere of Rice Plants and in Submerged Soils
Author(s) -
Raghu K.,
MacRae I. C.
Publication year - 1966
Publication title -
journal of applied bacteriology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 0021-8847
DOI - 10.1111/j.1365-2672.1966.tb03511.x
Subject(s) - rhizosphere , dissolution , transplanting , phosphate , soil water , anaerobic exercise , agronomy , bacteria , anaerobic bacteria , biology , chemistry , ecology , sowing , physiology , biochemistry , genetics
S ummary . The incidence of phosphate‐dissolving micro‐organisms in two submerged tropical rice soils, and in the rhizosphere of the rice plant growing in one of these soils at different stages of plant development was studied. Large numbers of anaerobic and aerobic phosphate‐dissolving bacteria were found in both soils after 11 weeks of submergence. Phosphate‐dissolving fungi were found in only one of the soils, a latosolic soil. Both anaerobic and aerobic phosphate‐dissolving bacteria were stimulated in the rice rhizosphere. However, the rhizosphere effect was greater in the case of the anaerobic phosphate‐dissolving bacteria. The rhizosphere effect was greatest at the transplanting stage of rice plant growth but declined with age of the plants. The greatest decline in R/S ratio occurred between transplanting and initial tillering.