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Role of Azotobacter paspali in Association with Paspalum notatum
Author(s) -
BROWN MARGARET E.
Publication year - 1976
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.1365-2672.1976.tb04182.x
Subject(s) - paspalum notatum , nitrogenase , biology , botany , azotobacter , nitrogen fixation , bacteria , genetics
Azotobacter paspali grows in the rhizospheres of Paspalum notatum where it is thought to fix nitrogen actively and hence improve pasture growth. In the experiments described here A. paspali improved growth primarily by producing growth regulating substances. Nitrogenase activity was not detected in rhizospheres of young plants. Its occurrence in older plants was not necessarily associated with the presence of A. paspali and was greater in the rhizopheres of control than of inoculated plants.