There are four different kinds of ornamental sweet potato varieties, 'Purple nobleman', 'Bianerhong', 'Jizuihuang' and 'Wuzhiju'. Although the varieties are different, they all belong to the ornamental sweet potato and are set in the light incubator respectively. 100% light intensity (control), 60% light intensity, 40% light intensity and 20% light intensity were used to measure the leaf color of ornamental sweet potato, and the results of the analysis were recorded. Then the influence of light intensity on ornamental sweet potato was analyzed.
Through the experimental data obtained in the light incubator, the following conclusions can be drawn: With the weakening of the light intensity, the chlorophyll content of the ornamental sweet potato increases, and the content of anthocyanin decreases, so that the red color of the ornamental sweet potato leaves becomes lighter, and the green becomes darker. . The main reason for the analysis is that the leaf color of ornamental sweet potato is closely related to chlorophyll a content, chlorophyll b content, carotenoid content, anthocyanin content, and DFR enzyme activity, while different light intensity treatments affect the color of four ornamental sweet potato varieties. The parameters L*, leaf color parameter a*, leaf color parameter b*, chlorophyll a content, chlorophyll b content, carotenoid content, anthocyanin content, PAL enzyme activity, CHI enzyme activity, and DFR enzyme activity all had significant effects. The soluble sugar content of 'Zi Gui Ren', 'Bian Er Hong' and 'Wu Zhi Ju' had significant effects, and had no significant effect on the 'Caroline Light' green soluble sugar.
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