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Study of ABA and Cadmium on the Regulation of Capsaicin

Author: LiWei
Tutor: XiaoLangTao
School: Hunan Agricultural University
Course: Biophysics
Keywords: Capsaicin Vitamin C Peroxidase Photosynthesis
CLC: S641.3
Type: Master's thesis
Year: 2009
Downloads: 23
Quote: 0
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Abstract


Pepper fruits are rich in capsaicins, vitamin C, (3-carotene, folic acid, magnesium and potassium, which capsaicin substances and vitamin C is the important indicator of pepper fruit quality. Light intensity, nitrogen treating were researched the most but the stress treatment was studied less. People generally believed that moderate drought stress can enhance the capsaicin content, but in-depth study. Abscisic acid (ABA) as a signal of stress plays an important role in the regulation of water balance and plant stress tolerance. Cadmium (Cd2+) is the heavy metal pollutants, Cd2+ levels in soil and crop is an important indicator which reflects the degree of heavy metal contamination of farmland in our country.The effects of ABA and Cd2+ on the content of capsaicin and vitamin C was studied in the pepper Xiangyan NO.15 at different developmental stages as well as the relations between capsaicin, vitamin C in the treated plants and POD activity and photosynthetic rate. The result showed that each of the peak value of capsaicin increased 80.4% and 60.9% respectively after ABA and Cd2+ treatment. The POD activity were enhanced significantly. The trend of capsaicin and POD activity were basically the same and the photosynthetic rate decreased after ABA and Cd2+ treatment. The content of vitamin C decreased 12.8%-21.7% during the turning stage after ABA treatment, the SPAD value remarkable increased. The content of vitamin C decreased 18%-25% during the turning stage and 13%-26% during the red stage, the SPAD value remarkable decreased before the red stage after Cd2+ treatment. As a as parallel processing, Xiangyan No.6 was the same as Xiangyan No.15 on the change of capsaicin and vitamin C.

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CLC: > Agricultural Sciences > Gardening > Vegetable gardening > Solanaceous > Chili
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