Photosynthetic Rate, Chlorophyll Fluorescence in Anthracnose Infected Tea Plants

文献类型： 外文期刊

第一作者： Hu, Hao

作者： Hu, Hao;Gu, Qing;Sheng, Li;Zhou, Hong-Kui;Hu, Hao;Gu, Qing;Yuan, Yu-Wei;Sheng, Li;Zhou, Hong-Kui;Liu, Zhi;Tang, Mei-Jun;Guo, Hua-Wei;Zhang, Guang-Zhi;Yuan, Yu-Wei;Liu, Zhi

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关键词： Percent disease index; OJIP curves; PSII photochemical activity; Pigment content

期刊名称：INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY （ 影响因子：0.822； 五年影响因子：0.906 ）

ISSN： 1560-8530

年卷期： 2020 年 24 卷 3 期

页码：

收录情况： SCI

摘要： Anthracnose is one of the most common diseases that threaten tea plants (Camellia sinensis) by negatively affecting the tea quality and yield. Photosynthesis related to tea plants growth is very important in disease defense management. Few reports exist on the effect of anthracnose disease on the photosynthetic functions of tea plant The susceptible and resistant tea plants Longjing 43 and Yingshuang were chosen, and a pot experiment was carried out Healthy (CK), slight (D1), moderate (D2) and serious (D3) anthracnose infected treatments with three replicates were set up. Percent disease index (PDI), leaf photosynthesis, chlorophyll fluorescence and pigment contents were measured. The results showed that the PDIs in anthracnose infected treatments were higher than those in healthy plants and reached the highest value of 43.69 and 13.57 in D3 of Longjing 43 and Yingshuang plants. Compared with the healthy plants, the total of chlorophyll a and chlorophyll b content reduced 32.3 and 39.6% in anthracnose infected Longjing 43 and Yingshuang. In further measurements, the photosynthetic rate in anthracnose infected Longjing 43 and Yingshuang decreased 73.8 and 53.8% in comparison of healthy plants. OJIP curves and parameters F-m, F root F-m, Phi(PSII) images could differentiate CK, D1, D2 and D3 anthracnose infected plants in the experiment. These suggested that anthracnose disease may inhibit the PSII photochemical activity across the two tea plants after they were infected by anthracnose. The findings might contribute to the knowledge of the disease stress effect on photosynthesis in tea plants and the valuable application to monitor the disease. 2020 Friends Science Publishers

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