Increased UV-B Radiation Reduces N sub(2)-Fixation in Tropical Leguminous Crops
Ozone depletion is allowing increased levels of UV-B radiation to reach the surface of the earth. Tests were conducted to assess the impacts of supplemental UV-B radiation on three leguminous plants maintained under field conditions. The UV-B radiation levels used for the experiments were equivalent...
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| Published in | Environmental pollution (1987) Vol. 95; no. 3; p. 289 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.01.1997
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| Online Access | Get full text |
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| Summary: | Ozone depletion is allowing increased levels of UV-B radiation to reach the surface of the earth. Tests were conducted to assess the impacts of supplemental UV-B radiation on three leguminous plants maintained under field conditions. The UV-B radiation levels used for the experiments were equivalent to a 15% reduction in ozone for 25 degree N latitude. Several different factors were monitored during the tests, including net photosynthesis, leaf area, biomass, and the number and size of nodules. The enhanced levels of UV-B radiation negatively impacted the net photosynthetic rate, growth characteristics, and nodule activity of all species tested. The largest decline in net photosynthesis occurred in Phaseolus mungo cv. Pant U-30. High reductions in nitrogenase activity were observed in Vigna radiata. |
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| Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 content type line 23 ObjectType-Feature-1 |
| ISSN: | 0269-7491 |