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The Tomato Hybrid Proline-rich Protein regulates the abscission zone competence to respond to ethylene signals

Horticulture Research 2018年第1期5卷 528-544页

作者： Srivignesh Sundaresan Sonia Philosoph-Hadas Chao Ma Cai-Zhong Jiang Joseph Riov Raja Mugasimangalam Betina Kochanek Shoshana Salim michael sreid Shimon Meir Department of Postharvest Science of Fresh Produce Agricultural Research Organization(ARO)The Volcani CenterRishon LeZiyonIsrael The Robert H.Smith Institute of Plant Sciences and Genetics in Agriculture The Robert H.Smith Faculty of AgricultureFood and EnvironmentThe Hebrew University of JerusalemRehovotIsrael Department of Plant Sciences University of CaliforniaDavisCAUSA Crops Pathology&Genetic Research Unit USDA-ARSDavisCAUSA Department of Bioinformatics QTLomics Technologies Pvt.LtdBangaloreIndia Department of Nano Science and Technology Tamil Nadu Agricultural UniversityCoimbatoreIndia Beijing Key Laboratory of Development and Quality Control of Ornamental Crops Department of Ornamental HorticultureChina Agricultural UniversityBeijingChina

The Tomato Hybrid Proline-rich Protein(THyPRP)gene was specifically expressed in the tomato(Solanum lycopersicum)flower abscission zone(FAZ),and its stable antisense silencing under the control of an abscission zone(AZ)-specific promoter,Tomato Abscission Polygalacturonase4,significantly inhibited tomato pedicel abscission following flower *** understanding the THyPRP role in regulating pedicel abscission,a transcriptomic analysis of the FAZ of THyPRP-silenced plants was performed,using a newly developed AZ-specific tomato microarray *** expression of THyPRP in the silenced plants was already observed before abscission induction,resulting in FAZ-specific altered gene expression of transcription factors,epigenetic modifiers,post-translational regulators,and *** data demonstrate that the effect of THyPRP silencing on pedicel abscission was not mediated by its effect on auxin balance,but by decreased ethylene biosynthesis and ***,THyPRP silencing revealed new players,which were demonstrated for the first time to be involved in regulating pedicel abscission *** include:gibberellin perception,Ca2+-Calmodulin signaling,Serpins and Small Ubiquitin-related Modifier proteins involved in post-translational modifications,Synthaxin and SNARE-like proteins,which participate in exocytosis,a process necessary for cell *** changes,occurring in the silenced plants early after flower removal,inhibited and/or delayed the acquisition of the competence of the FAZ cells to respond to ethylene *** results suggest that THyPRP acts as a master regulator of flower abscission in tomato,predominantly by playing a role in the regulation of the FAZ cell competence to respond to ethylene signals.

关键词： Hybrid inhibited competence

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