ISSN:
1573-5036
Keywords:
Basal portions of shoots
;
Heterotrophic N2 fixation
;
Oryza australiensis
;
Wetland rice
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary Oryza sativa grown in flooded soil were transferred to water culture solution and acetylene reduction activities (ARA) of intact plants and rootless plants were measured for 5 h. Relative rate of ARA associated with the rootless wetland rice plant as compared with an intact plant varied from 8 to 100 percent, depending on the growth stage and varieties of rice and highest at the early stage (3 weeks after transplanting) for all varieties tested (IR26, Latisail, Khao Lo, and JBS236). ARA of shoots was associated with basal parts of the shoots about 3 cm from the base of wetland cultivated rice andOryza australiensis. Phyllospheric ARA was negligible except for senescent outer leaf sheaths. Microaerophilic N2-fixing bacteria also inhabited basal parts of shoots (outer leaf sheaths and stems) of wetland rice. These findings suggest that N2-fixation is partly associated with the shoots of wetland rice plants.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02184543
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