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Интеллектуальная Система Тематического Исследования НАукометрических данных |
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Plant Virus-Host Interactionкнига
- Авторы: Dorokhov Y.L., Komarova T.V., Sheshukova E.V.
- Год издания: 2014
- Место издания: Academic Press is an imprint of Elsevier The Boulevard, Langford Lane, Kidlington, Oxford, OX5 1GB, UK 225 Wyman Street, Waltham, MA 02451, USA
- Объём: 431 страниц
- ISBN: 978-0-12-411584-2
- DOI: 10.1016/B978-0-12-411584-2.00013-5
- Аннотация: Plant cells are bounded by a dense cell envelope that prevents the penetration of viruses. Wounding of the cell wall (CW) through microdamage caused by abiotic factors (wind, hail, rain) and biotic factors (insects) may allow the penetration of virus particles into the cell. Once in the cytoplasm, the viral genome is translated, replicated, and later transferred to neighboring cells and throughout the plant. On the other hand, mechanical damage to the leaf promotes the emission of volatile organic compounds (VOCs), such as green leaf volatiles and methanol (MeOH), which are quickly taken up by the intact leaves of the damaged plant and the neighboring plants. The transport of VOCs is much faster compared to the transport of infectious viral entities through the phloem during systemic infection of a plant. Thus, exposure to VOCs may result in a ‘priming’ effect on intact leaves, setting the stage for the subsequent viral infection. In tobacco leaves, MeOH induces the synthesis of mRNA encoding the so-called methanol-inducible genes, most of which are associated with stress, defense, and the intercellular transport of macromolecules. The emission of MeOH by a wounded plant enhances the resistance of non-wounded neighboring ‘receiver’ plants to the bacterial pathogen Ralstonia solanacearum and promotes cell-to-cell communication that facilitates the spread of Tobacco mosaic virus in neighboring plants. For the vector-transmitted viruses, such as persistent viruses (Potato leafroll virus and Barley yellow dwarf virus) and non-persistent viruses (Cucumber mosaic virus), VOCs also play a favorable auxiliary role, whereas VOCs are alarm cues that promote protective mechanisms in response to other pathogens (bacteria, fungi, oomycetes, nematodes) and herbivore attack. The different effects of VOCs on plant viruses and other pathogens seem to be due to differences in the localization of the pathogen. While a virus spends its entire life cycle in the cell symplast, bacteria and other pathogens reside in the apoplast. VOCs are apoplastic factors that are transferred through the air and affect the structure of the apoplast, including the CW, which is essential for plant immunity. Our knowledge of the role of VOCs in the viral life cycle and in inter- and intra-plant communication remains incomplete. When considering the use of VOCs for plant protection, we must keep in mind the potential sensitization of plants to viral infections, which is most likely the inevitable price of resistance to bacteria, fungi, oomycetes, and nematodes.
- Добавил в систему: Дорохов Юрий Леонидович