Articles
CHANGES IN ANTHOXANTHIN CONCENTRATIONS AND ANTIOXIDATIVE ENZYMES IN A CATTLEYA (ORCHIDACEAE) HYBRID GROWN UNDER DIFFERENT UV CONDITIONS
Article number
618_19
Pages
177 – 181
Language
English
Abstract
Cattleya Slc.
Estella Jewel Kazumura plants were grown under different UV conditions beginning in June for five months.
UV, especially UV-A370, was required for chlorophyll and carotenoid synthesis.
Anthoxanthin was reduced by UV-A352 and UV-A370. SOD activity in leaves decreased by sudden UV-A352 exposure with a subsequent rapid increase.
Different changes in APX under different UV conditions show a long duration of deteriorated effects of UV-A352 and UV. CAT activities of every plot decreased in summer.
UV-A352 affected more anthoxanthins and antioxidative enzyme activities than UV-A370. These findings indicate that Cattleya that tolerates UV by increased carotenoid synthesis and subsequent increases in SOD and APX activities after SOD inactivation during the early period of the irradiation.
Estella Jewel Kazumura plants were grown under different UV conditions beginning in June for five months.
UV, especially UV-A370, was required for chlorophyll and carotenoid synthesis.
Anthoxanthin was reduced by UV-A352 and UV-A370. SOD activity in leaves decreased by sudden UV-A352 exposure with a subsequent rapid increase.
Different changes in APX under different UV conditions show a long duration of deteriorated effects of UV-A352 and UV. CAT activities of every plot decreased in summer.
UV-A352 affected more anthoxanthins and antioxidative enzyme activities than UV-A370. These findings indicate that Cattleya that tolerates UV by increased carotenoid synthesis and subsequent increases in SOD and APX activities after SOD inactivation during the early period of the irradiation.
Authors
X. Zhao, S. Matsui, J. Li
Keywords
anthoxanthin, antioxidative enzymes, cattleya, UV-A irradiation
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