Natural fumigation as a mechanism for volatile transport between flower organs
Natural fumigation as a mechanism for volatile transport between flower organs
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DOI：
10.1038/s41589-019-0287-5
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发表时间：
2019-06-01
影响因子：
14.8
通讯作者：
Dudareva, Natalia
中科院分区：
文献类型：
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作者：
Boachon, Benoit;Lynch, Joseph H.;Dudareva, Natalia
植物合成挥发性有机化合物(VOC)来吸引传粉者和有益微生物，保护自己免受食草动物和病原体的侵害，并用于植物与植物之间的交流。一般来说，VOCs在其生物合成的组织中积累和排放。然而，使用生化和反向遗传方法，我们展示了一种新的生理现象：通过自然熏蒸进行VOCs的器官间空中运输。在矮牵牛花开放之前，一种管特有的萜类合成酶产生倍半萜，这些倍半萜在花蕾内释放，然后积累在柱头中，有可能保护发育中的柱头免受病原体的侵袭。这些挥发性有机化合物还影响生殖器官发育和种子产量，这是萜类化合物以前未知的功能。
Plants synthesize volatile organic compounds (VOCs) to attract pollinators and beneficial microorganisms, to defend themselves against herbivores and pathogens, and for plant-plant communication. In general, VOCs accumulate in and are emitted from the tissue of their biosynthesis. However, using biochemical and reverse genetic approaches, we demonstrate a new physiological phenomenon: inter-organ aerial transport of VOCs via natural fumigation. Before petunia flowers open, a tube-specific terpene synthase produces sesquiterpenes, which are released inside the buds and then accumulate in the stigma, potentially defending the developing stigma from pathogens. These VOCs also affect reproductive organ development and seed yield, which are previously unknown functions of terpenoid compounds.