Some Morphological and Biochemical Characteristics of C3 and C4 Plants Irradiated with UV-B |
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| Authors: | FOUAD M. BASIOUNY T. K. VAN R. H. BIGGS |
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| Affiliation: | Department of Fruit Crops, University of Florida, Gainesville, Florida 32611 |
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| Abstract: | Four C3 and two C4 plants were subjected for 350 h to an enhanced UV-B radiation (280 to 310 nm) regime simulating a 0.18 atm. cm ozone level (solar angle 55°) in growth chamber. Different degrees of response among plant species were observed. UV-B radiation reduced plant height, fresh and dry weight, protein content, total chlorophyll, inhibited net CO2 uptake and the Hill reaction activity. Some broad-leaved species with C3 type of carbon assimilation were more susceptible to UV-B alterations of morphological and biochemical characteristics than the narrowleaved species with C4 type photosynthesis. |
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