Elucidation of the Regular Emission Mechanism of Volatile β-Ocimene with Anti-insect Function from Tea Plants (Camellia sinensis) Exposed to Herbivore Attack,Journal of Agricultural and Food Chemistry

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Elucidation of the Regular Emission Mechanism of Volatile β-Ocimene with Anti-insect Function from Tea Plants (Camellia sinensis) Exposed to Herbivore Attack
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2021-09-20 , DOI: 10.1021/acs.jafc.1c03534
Guotai Jian _{1,

2} , Yongxia Jia ₁ , Jianlong Li ₃ , Xiaochen Zhou _{1,

2} , Yinyin Liao _{1,

2} , Guangyi Dai ₁ , Ying Zhou ₁ , Jinchi Tang ₃ , Lanting Zeng _{1,

2,

4}

Affiliation

Herbivore-induced plant volatiles (HIPVs) play an important role in insect resistance. As a common HIPV in tea plants (Camellia sinensis), β-ocimene has shown anti-insect function in other plants. However, whether β-ocimene in tea plants also provides insect resistance, and its mechanism of synthesis and emission are unknown. In this study, β-ocimene was confirmed to interfere with tea geometrid growth via signaling. Light was identified as the key factor controlling regular emission of β-ocimene induced by the wounding from tea geometrids. β-Ocimene synthase (CsBOS1) was located in plastids and catalyzed β-ocimene formation in overexpressed tobacco. CsBOS1 expression in tea leaves attacked by tea geometrids showed a day-low and night-high variation pattern, while CsABCG expression involved in volatile emission showed the opposite pattern. These two genes might regulate the regular β-ocimene emission from tea plants induced by tea geometrid attack. This study advances the understanding on HIPV emission and signaling in tea plants.

中文翻译：

草食动物攻击的茶树（Camellia sinensis）中具有杀虫作用的挥发性β-罗勒烯的规律排放机制的阐明

草食动物诱导的植物挥发物 (HIPV) 在昆虫抗性中起重要作用。β-罗勒烯作为茶树（Camellia sinensis）中常见的HIPV，在其他植物中也表现出抗虫作用。然而，茶树中的β-罗勒烯是否也具有抗虫性，其合成和释放机制尚不清楚。在这项研究中，β-罗勒烯被证实通过信号干扰茶几何图形的生长。光被确定为控制茶叶几何图形损伤引起的 β-罗勒烯规律发射的关键因素。β-罗勒烯合酶 (CsBOS1) 位于质体中并催化过表达烟草中 β-罗勒烯的形成。CsBOS1受茶球虫攻击的茶叶中的表达表现出昼低夜高的变化模式，而参与挥发性排放的CsABCG表达则表现出相反的模式。这两个基因可能调节由茶尺蠖攻击诱导的茶树的规则β-罗勒烯排放。这项研究促进了对茶树中 HIPV 发射和信号的理解。

更新日期：2021-09-29

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