Analysis of Leaf Anatomical Structure of Wuyi Mingcong Tea Germplasm Resources
Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2019, Vol. 40 ›› Issue (12): 2375-2389.DOI: 10.3969/j.issn.1000-2561.2019.12.010

• Phytophysiology and Biochemistry • Previous Articles     Next Articles

Analysis of Leaf Anatomical Structure of Wuyi Mingcong Tea Germplasm Resources

WANG Feiquan1,LI Jiyan2,FENG Hua1,LUO Shengcai3,LIN Meijing1,LI Shaohua1,ZHNAG Jianming4,ZHANG Bo1,CHEN Rongbing1,*()   

  1. 1. College of Tea and Food Science, Wuyi University / Collaborative Innovation Center of Chinese Oolong Tea Industry, Wuyishan, Fujian 354300, China
    2. Rizhao Tea Research Institute, Rizhao, Shandong 276800, China
    3. Guiyan Tea Industry Co., Ltd., Wuyishan, Fujian 354300, China
    4. International Tea Research Center, Wuyi University, Wuyishan, Fujian 354300, China
  • Received:2019-02-12 Revised:2019-05-28 Online:2019-12-25 Published:2019-12-20
  • Contact: CHEN Rongbing

Abstract:

In order to identify and evaluate the leaf anatomical characteristics of tea germplasm resources in Wuyi Mountain tea region, the leaves of 70 Wuyi Mingcong tea germplasms were used as the materials for the comparative analysis of the anatomical structures and characteristics. There was abundant genetic variability in the 17 anatomical structure traits of the leaves of the 70 Wuyi Mingcong, with an average genetic diversity index of 1.85 and an average coefficient of variation of 17.64%. Strong stress resistance was found for all the germplasms. The mean value of the average membership function of drought resistance, disease and insect resistance and the average score of the cold resistance was 0.40, 0.39 and 1.28, respectively. Most of them were suited for making Oolong tea or green tea, while a few were suited for making black tea or both black and green tea. The average productivity index was 2648.85, indicating a higher potential productivity. The cluster analysis based on the anatomical structure traits of leaves showed that the 70 Wuyi Mingcong were divided into three groups. In addition to the thickness of upper and lower epidermis cuticle, the thickness ratio of upper epidermis to sponge tissue and the crystal number of calcium oxalate, other anatomical structure traits showed significantly or extremely significant difference among the three groups. The principal component analysis showed that the characteristic value of the former four principal components were bigger than one and represented 84.26% of the information of 17 anatomical structure traits of leaves. The composite scores of each Wuyi Mingcong were calculated based on the principal component and their corresponding characteristic value. The top ten Wuyi Mingcong had excellent comprehensive characters, which could be used in the development and innovative utilization of Oolong tea products, the selection and breeding of excellent tea varieties. The results were expected to provide references for the identification and utilization of local excellent tea germplasm resources and the breeding of new varieties in Wuyi Mountain.

Key words: Wuyi Mingcong, germplasm resources, leaf anatomical structure, resistance, productivity index, cluster analysis, principal component analysis

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