›› 2019, Vol. 31 ›› Issue (9): 1493-1501.DOI: 10.3969/j.issn.1004-1524.2019.09.13

• Horticultural Science • Previous Articles     Next Articles

Changes of physiological indexes and quality analysis of lettuce under optical interference film

ZHAI Keqing1, ZHANG Xinyu2, ZHOU Niannian1, AN Yulan1, LEI Yue1, GAO Jie1, GAN Defang1,*, LIU Wen2, HE Xiaomei3   

  1. 1. College of Horticulture, Anhui Agricultural University, Hefei 230036, China;
    2. School of Physical Sciences, University of Science and Technology of China, Hefei 230026, China;
    3. West Anhui University, Lu’an 237012, China
  • Received:2019-03-03 Online:2019-09-25 Published:2019-10-11

Abstract: Due to short growing period, high yield and suitable for raw food, lettuce becomes an important leafy vegetable in facility cultivation. Traditional photovoltaic power generation occupies a large amount of land resources, while photovoltaic agriculture performs photovoltaic power generation under the illumination demand that meets the growth of crops. In this study, two kinds of lettuce varieties, MonDai and Kristin were used as the tested varieties to study the bioactive enzymes, nutritional quality and the ultrastructure of the leaves under different optical interference films (red blue light transmission film and far red light-cutting film). The results showed that the CAT activity, SOD activity and malondialdehyde content of MonDai showed a downward trend under the red blue light transmission film and the far-red light-cutting film. Meanwhile, the increased activity of CAT and the reduced activity of SOD and the malondialdehyde appeared in Kristin covered with two films. However, the enzyme activities of two lettuces under two kinds of film mulching were mostly higher than those of the control. As for the nutritional quality of lettuce, the content of soluble sugar in the two lettuces increased firstly and then decreased in the red-blue light transmission film treatment, while there is an upward trend in the far red light-cutting film treatment. With the extension of the coverage time, the accumulation of vitamin C increased significantly in both light treatments and the content of protein and chlorophyll decreased, while most of them are higher than those of the control. The ultrastructural analysis of the leaves showed that the chloroplast aggregation of the MonDai increased under the red and blue light, while some cells of the leaves were destroyed under the far red light-cutting film, and the chloroplast granules were not obvious. This study provided a reference and basis for the technical improvement of optical interferometric film, the field application and the future development trend of photovoltaic agriculture.

Key words: optical interference film, lettuce, physiological index, nutritional quality, cell ultrastructure

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