To study the effect of drought stress on
capsaicin, dihydrocapsaicin and VC contents in pepper fruit and the changes in
leaf blade photosynthetic characters, researchers Pengqiong, Tong Jianhua, Bai
Lianyang and Xiao Langtao took pepper variety Xiangyan5 as testing material and
carried out control experiment. The pepper was planted in three pots with
different drought stresses (mild, moderate and irrigated appropriately).
Results show that:
- 60 days after flowering, contents of
capsaicin and dihydrocapsaicin of peppers planted under mild drought stress
were 63.36% and 63.03% respectively higher than those of the other two
contrasts;
- 40 days and 50 days after flowering,
drought stress at different degree can help improve the content of Vitamin C
(VC) in pepper fruits significantly;
- 60 days after flowering, content of VC of
peppers planted under mild drought stress reached its peak and content of VC of
peppers planted under moderate drought stress was the lowest among the three;
- Net photosynthetic rates of pepper plant
firstly increase then decline, and gradually decreased along with the
enhancement of drought degree.
*News on China Vegetables, a journal
produced by the Institute of Vegetables and Flowers, Chinese Academy of
Agricultural Science.
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