Effect of enhanced ultraviolet-B radiation on photosynthetic pigments and flavonoids in the leaves of grapevine | UV-B辐射对葡萄叶片光合色素和类黄酮含量的影响
2011
Li Hongjuan, China Agricultural University (Yantai), Yantai (China), College of Food and Wine | Zhou Xinming, Yantai Changyu Group Company Ltd., Yantai (China) | Zhang Weiqiang, Yantai Changyu Group Company Ltd., Yantai (China)
[Objective] The study aimed at investigating the influence of enhanced UV-B radiation on photosynthesis of grapevine. [Method] The seedlings of Cabernet Sauvignon were treated with different intensities of UV-B radiation under outdoor conditions, and then the contents of photosynthetic pigments and flavonoids in leaves were determined by measuring the absorbance of leaves extracts at 663, 645, 470 and 300 nm, respectively. [Result] The content of photosynthetic pigments in the leaves of grapevine obviously increased with time under the treatments of different enhanced UV-B radiation. Compared with the control, the chlorophyll a, chlorophyll b, total chlorophyll and carotenoid were obviously increased by 5%, 2%, 4% and 3% in the enhanced UV-B radiation treatment of 10.8 W/cm2 (T1), and in the treatment of 25.6 W/cm2 (T2) the corresponding levels were subsequently increased by 11%, 9%, 10% and 7% with a significant increase in the content of chlorophyll a. On the other hand, the flavonoids content in the leaves of grapevine were obviously increased by 13%, 9% in T1 and T2. [Conclusion] The grapevine has strong adaptability to UV-B radiation, and appropriate enhanced UV-B radiation couldnt decrease the photosynthesis of grapevine leaves.
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