Study on the Differences of Leaf Color and Volatiles of Different Insect-resistance Tea Cultivars

SUN Yue; LIU Mengyue; GAO Chenxi; WU Quanjin; CAO Shixian; YU Shuntian; CHEN Zhidan; JIN Shan; SUN Weijiang

doi:10.13305/j.cnki.jts.2023.04.005

Journal of Tea Science >

2023 , Vol. 43 >Issue 4: 525 - 543

DOI: https://doi.org/10.13305/j.cnki.jts.2023.04.005

Research Paper

Study on the Differences of Leaf Color and Volatiles of Different Insect-resistance Tea Cultivars

SUN Yue ,
LIU Mengyue ,
GAO Chenxi ,
WU Quanjin ,
CAO Shixian ,
YU Shuntian ,
CHEN Zhidan ,
JIN Shan ,
SUN Weijiang

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1. College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China;
2. Anxi College of Tea, Fujian Agriculture and Forestry University, Quanzhou 362400, China;
3. Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, China;
4. College of Law, Chinese Studies & Economics, the Open University of Fujian, Fuzhou 350003, China;
5. Wuyi Star Tea Industrial Company Limited, Wuyishan 354301, China

Received date: 2023-02-28

Revised date: 2023-05-15

Online published: 2023-08-24

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Abstract

In order to explore the differences in leaf color and volatiles of different insect-resistant tea cultivars, a two-year field population density survey was conducted on 11 tea cultivars. Through the indoor incubation test of field branches and the indoor life parameter determination test, the reliability of field population density as the resistance grading standard was proved. The color difference and wax content per unit leaf area of leaves were determined, and the volatiles of new shoots of one bud and two leaves that were not harmed by pests and diseases were detected by gas chromatography-mass spectrometry (GC-MS) in order to screen the differences among different insect-resistant tea cultivars. The results show that, M. onukii preferred tea cultivars with darker, lighter yellow leaves. D minowai preferred tea cultivars with brighter, more saturated colors and a higher yellow color, and D minowai placed more emphasis on the color of the leaf back. In terms of volatiles, the population densities of M. onukii were significantly and positively correlated with the relative content of linalool and negatively correlated with the relative contents of nonanal and dodecane. Population densities of D. minowai were significantly and positively correlated with the relative levels of dodecane and phenylethanol. The effects of dodecane on M. onukii and D. minowai were opposite, and the same trend was observed for the relationship between wax and population density in tea leaves, suggesting that the same volatile substance may have different reactions to different insects.

Key words： tea plant; Matsumurasca onukii; Dendrothrips minowai; leaf color; volatile components; resistance

Cite this article

SUN Yue , LIU Mengyue , GAO Chenxi , WU Quanjin , CAO Shixian , YU Shuntian , CHEN Zhidan , JIN Shan , SUN Weijiang . Study on the Differences of Leaf Color and Volatiles of Different Insect-resistance Tea Cultivars[J]. Journal of Tea Science, 2023 , 43(4) : 525 -543 . DOI: 10.13305/j.cnki.jts.2023.04.005

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