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乙烯参与柑橘裂皮类病毒感染后番茄植株的症状发展和核糖体应激反应。

Ethylene is Involved in Symptom Development and Ribosomal Stress of Tomato Plants upon Citrus Exocortis Viroid Infection.

作者信息

Prol Francisco Vázquez, López-Gresa M Pilar, Rodrigo Ismael, Bellés José María, Lisón Purificación

机构信息

Instituto de Biología Molecular y Celular de Plantas, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, 46011 Valencia, Spain.

出版信息

Plants (Basel). 2020 May 2;9(5):582. doi: 10.3390/plants9050582.

DOI:10.3390/plants9050582
PMID:32370199
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7285140/
Abstract

Citrus exocortis viroid (CEVd) is known to cause different symptoms in citrus trees, and its mechanism of infection has been studied in tomato as an experimental host, producing ribosomal stress on these plants. Some of the symptoms caused by CEVd in tomato plants resemble those produced by the phytohormone ethylene. The present study is focused on elucidating the relationship between CEVd infection and ethylene on disease development. To this purpose, the ethylene insensitive () tomato mutants were infected with CEVd, and several aspects such as susceptibility to infection, defensive response, ethylene biosynthesis and ribosomal stress were studied. Phenotypic characterization revealed higher susceptibility to CEVd in these mutants, which correlated with higher expression levels of both defense and ethylene biosynthesis genes, as well as the ribosomal stress marker . In addition, Northern blotting revealed compromised ribosome biogenesis in all CEVd infected plants, particularly in mutants. Our results indicate a higher ethylene biosynthesis in mutants and suggest an important role of this phytohormone in disease development and ribosomal stress caused by viroid infection.

摘要

已知柑橘裂皮类病毒（CEVd）会在柑橘树上引发不同症状，并且其感染机制已在作为实验宿主的番茄中进行研究，会对这些植物产生核糖体应激。CEVd在番茄植株中引发的一些症状类似于植物激素乙烯所产生的症状。本研究着重于阐明CEVd感染与乙烯在病害发展中的关系。为此，用CEVd感染乙烯不敏感的（）番茄突变体，并研究了诸如感染易感性、防御反应、乙烯生物合成和核糖体应激等几个方面。表型特征显示这些突变体对CEVd的易感性更高，这与防御和乙烯生物合成基因以及核糖体应激标记物的更高表达水平相关。此外，Northern印迹分析显示所有受CEVd感染的植株中核糖体生物合成受损，尤其是在突变体中。我们的结果表明突变体中乙烯生物合成更高，并表明这种植物激素在类病毒感染引起的病害发展和核糖体应激中起重要作用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3ccd/7285140/6a6ef4da91d2/plants-09-00582-g009.jpg
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