Variability of overhead volatile organic compounds in clonal tea ( Camellia sinensis ) and their influence on red crevice mite ( Brevipalpus phoenicis Geijskes) infestations

茶叶科学 Pub Date : 2016-04-15 DOI:10.20425/IJTS.V0IOF.9574

Jenipher A. Odak, P. O. Owuora, L. Manguro, E. Cheramgoi, and Francis N. Wachira

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引用次数: 2

Abstract

Tea production in Kenya is under threat due to red crevice mites (Brevipalpus phoenicis) infestations during droughts. Cultural pests control practices, e.g. use of resistant/tolerant cultivars are used in their control since pesticide use is prohibited. Plants release volatile organic compounds (OVOCs) that may influence susceptibility/resistance to pest infestations. OVOCs profiles released by 11 tea cultivars were evaluated to assess relationship between OVOCs and cultivar tolerance/susceptibility to B. phoenicis. Five clones were susceptible, with high B. phoenicis infestations while four clones were resistant, exhibiting low infestation levels. The infestations were linearly correlated to (E)-2-hexenal, (Z)-3-hexenal (p≤0.001), (Z)-3-hexenol, (Z)-3-hexenyl acetate, linalool, germacrene D, sum of green leaf volatiles (GLVs) (p≤0.01), 1-pentene-3-ol, hexanal, indole and (E)-β-ocimene (p≤0.05) levels. Most of aromatic compounds, some terpenoids compounds and sum of aromatic compounds were inversely (p≤0.05) correlated with B. phoenicis infestations. Susceptible varieties to B. phoenicis emitted high amounts of GLVs, especially (E)-2-hexenal, (Z)-3-hexenal, (Z)-3-hexen-1-ol and (Z)-3-hexenyl acetate. Results demonstrate that OVOCs profile may provide selection criteria for cultivars resistant to B. phoenicis infestations. Resistant cultivars are recommended for commercial exploitation in red crevice mites prone areas while breeding/selection programmes should incorporate OVOCs profiles to develop tea cultivars that resist red crevice mites attack.

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无性系茶(Camellia sinensis)头顶挥发性有机物的变异及其对红缝螨(Brevipalpus phoenicis Geijskes)侵染的影响

肯尼亚的茶叶生产受到干旱期间红缝螨(phoenicbrevipalpus)侵扰的威胁。由于禁止使用农药，因此采用了防治虫害的栽培方法，例如使用抗/耐虫害品种。植物释放挥发性有机化合物(OVOCs)，可能影响对虫害的易感性/抗性。利用11个茶叶品种的挥发性有机化合物(OVOCs)谱，分析了OVOCs与品种对褐皮虫耐受性/敏感性之间的关系。5个无性系感虫率高，4个无性系抗虫率低。侵染与(E)-2-己烯醛、(Z)-3-己烯醛(p≤0.001)、(Z)-3-己烯醇、(Z)-3-乙酸己烯酯、芳樟醇、烯丙烯D、绿叶挥发物总量(GLVs) (p≤0.01)、1-戊烯-3-醇、己醛、吲哚和(E)-β-辛烯(p≤0.05)呈线性相关。大部分芳香族化合物、部分萜类化合物和芳香族化合物的总和与腓小蠊侵染呈负相关(p≤0.05)。易感品种的glv含量较高，尤其是(E)-2-己烯醛、(Z)-3-己烯醛、(Z)-3-己烯-1-醇和(Z)-3-己烯乙酸酯。结果表明，有机挥发性有机化合物的特征可为品种的选择提供依据。建议在红缝螨易发地区进行抗性品种的商业开发，而育种/选择计划应结合OVOCs谱来开发抗红缝螨攻击的茶叶品种。

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来源期刊

茶叶科学

CiteScore

1.50

自引率

0.00%

发文量

2558

期刊介绍： The Journal of Tea Science was established in August 1964, approved by the Publicity Department, CCCPC. Its title was inscribed by Zhu De, the chairman of CCCPC. It was discontinued during the Cultural Revolution in 1966, and it was reissued in August 1984, approved by the State Scientific and Technological Commission.Academicians Chen Zongmao and Liu Zhonghuaof the Chinese Academy of Engineering served as the directors of the editorial board. The Journal of Tea Science is managed by the China Association for Science and Technology,sponsored by the China Tea Science Society and the Tea Research Institute of the Chinese Academy of Agricultural Sciences, and edited and published by the editorial office of the Journal of Tea Science. It is the only one of Chinese core journals in the field of tea science that is included in the core library of the Chinese Science Citation Database.Its Domestic Unified Serial Number is CN 33-1115/S, its International Standard Serial Number is ISSN 1000-369X and its International publication name code is CODEN-CHKEF4. At present, the Journal of Tea Science is a bimonthly publication, published in the middle of the month, with a book size of 16.