CmMYC2-CmMYBML1模块通过同步调控菊花毛状体的发育和组成型萜烯的生物合成来协调菊花对草食性植物的抗性。

IF 8.3 1区生物学 Q1 PLANT SCIENCES

New Phytologist Pub Date : 2024-09-02 DOI:10.1111/nph.20081

Yaqin Guan, Li Jiang, You Wang, Guanhua Liu, Jiayi Wu, Hong Luo, Sumei Chen, Fadi Chen, Ülo Niinemets, Feng Chen, Yifan Jiang

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引用次数: 0

摘要

毛状体是覆盖大多数陆生植物气生部分的特化表皮突起。不同类型的毛状体在物种间存在很大差异，因此大多数植物物种毛状体形成的分子调控机制及其生物学功能仍有待探索。在此，我们以菊花（Chrysanthemum morifolium）为模式植物，探讨了毛状体形成和萜类化合物合成的调控网络，并揭示了毛状体在构成性防御食草动物取食中的物理和化学作用。通过分析毛状体摘除叶片和完整叶片转录组数据库中的毛状体相关基因，我们发现CmMYC2对T形毛状体和腺毛状体的发育以及腺毛状体中萜类化合物的含量均有正向调控作用。此外，我们还发现，CmMYC2 在毛状体形成和萜烯合成中的作用是通过与 CmMYBML1 相互作用来介导的。我们的研究结果揭示了一种复杂的分子机制，即 CmMYC2-CmMYBML1 反馈抑制环调节毛状体（非腺体和腺体）的形成和萜烯的生物合成，从而共同增强了对 Spodoptera litura 幼虫取食的抵抗力。我们的研究结果为了解植物通过同步调节毛状体密度来物理和化学防御草食性害虫的新型调控网络提供了新的视角。

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CmMYC2–CmMYBML1 module orchestrates the resistance to herbivory by synchronously regulating the trichome development and constitutive terpene biosynthesis in Chrysanthemum

Trichomes are specialized epidermal outgrowths covering the aerial parts of most terrestrial plants. There is a large species variability in occurrence of different types of trichomes such that the molecular regulatory mechanism underlying the formation and the biological function of trichomes in most plant species remain unexplored.
Here, we used Chrysanthemum morifolium as a model plant to explore the regulatory network in trichome formation and terpenoid synthesis and unravel the physical and chemical roles of trichomes in constitutive defense against herbivore feeding.
By analyzing the trichome-related genes from transcriptome database of the trichomes-removed leaves and intact leaves, we identified CmMYC2 to positively regulate both development of T-shaped and glandular trichomes as well as the content of terpenoids stored in glandular trichomes. Furthermore, we found that the role of CmMYC2 in trichome formation and terpene synthesis was mediated by interaction with CmMYBML1. Our results reveal a sophisticated molecular mechanism wherein the CmMYC2–CmMYBML1 feedback inhibition loop regulates the formation of trichomes (non-glandular and glandular) and terpene biosynthesis, collectively contributing to the enhanced resistance to Spodoptera litura larvae feeding.
Our findings provide new insights into the novel regulatory network by which the plant synchronously regulates trichome density for the physical and chemical defense against herbivory.

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来源期刊

New Phytologist 生物-植物科学

自引率

5.30%

发文量

728

期刊介绍： New Phytologist is an international electronic journal published 24 times a year. It is owned by the New Phytologist Foundation, a non-profit-making charitable organization dedicated to promoting plant science. The journal publishes excellent, novel, rigorous, and timely research and scholarship in plant science and its applications. The articles cover topics in five sections: Physiology & Development, Environment, Interaction, Evolution, and Transformative Plant Biotechnology. These sections encompass intracellular processes, global environmental change, and encourage cross-disciplinary approaches. The journal recognizes the use of techniques from molecular and cell biology, functional genomics, modeling, and system-based approaches in plant science. Abstracting and Indexing Information for New Phytologist includes Academic Search, AgBiotech News & Information, Agroforestry Abstracts, Biochemistry & Biophysics Citation Index, Botanical Pesticides, CAB Abstracts®, Environment Index, Global Health, and Plant Breeding Abstracts, and others.