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Molecular memory of Flavescence dorée phytoplasma in recovering grapevines

Horticulture Research 2020年第1期7卷 1185-1199页

作者： Chiara Pagliarani Giorgio Gambino Alessandra Ferrandino Walter Chitarra Urska Vrhovsek dario cantu Sabrina Palmano Cristina Marzachì Andrea Schubert Institute for Sustainable Plant Protection National Research Council(IPSPCNR)Strada delle Cacce 7310135 TurinItaly PlantStressLab Department of AgriculturalForestry and Food SciencesUniversity of TurinLargo Paolo Braccini 210095 GrugliascoTOItaly Research Centre for Viticulture and Enology Council for Agricultural Research and Economics(CREA-VE)Via XXVIII Aprile 2631015 ConeglianoTVItaly Fondazione Edmund Mach Via Edmund Mach 138010 San Michele all’AdigeTNItaly Department of Viticulture and Enology University of CaliforniaOne Shields AvenueDavisCA 95616USA

Flavescence dorée(FD)is a destructive phytoplasma disease of European *** and cultivardependent recovery(REC)may occur in the field in FD-infected vines starting the year following the first ***,the biological underpinnings of this process are still largely *** this study,transcriptome sequencing(RNAseq),whole-genome bisulphite sequencing(WGBS)and metabolite analysis were combined to dissect molecular and metabolic changes associated to FD and REC in leaf veins collected in the field from healthy(H),FD and REC plants of the highly susceptible Vitis vinifera‘Barbera’.Genes involved in flavonoid biosynthesis,carbohydrate metabolism and stress responses were overexpressed in FD conditions,whereas transcripts linked to hormone and stilbene metabolisms were upregulated in REC *** patterns of abscisic acid and stilbenoid compounds analysed in the same samples confirmed the RNAseq *** recovery conditions,we also observed the persistence of some FD-induced expression changes concerning inhibition of photosynthetic processes and stress *** differentially expressed genes tied to those pathways also underwent post-transcriptional regulation by microRNAs,as outlined by merging our transcriptomic data set with a previously conducted smallRNAseq *** by WGBS analysis also revealed different DNA methylation marks between REC and H leaves,occurring within the promoters of genes tied to photosynthesis and secondary *** results allowed us to advance the existence of a“molecular memory”of FDp infection,involving alterations in the DNA methylation status of REC plants potentially related to transcriptional reprogramming events,in turn triggering changes in hormonal and secondary metabolite profiles.

关键词： metabolism alterations starting

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The genetic basis of grape and wine aroma

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Horticulture Research 2019年第1期6卷 716-739页

作者： Jerry Lin Mélanie Massonnet dario cantu Department of Viticulture and Enology University of California DavisOne Shields AveDavisCA 95616USA

The grape is one of the oldest and most important horticultural *** and wine aroma has long been of cultural and scientific *** diverse compound classes comprising aroma result from multiple biosynthetic *** fairly recently have researchers begun to elucidate the genetic mechanisms behind the biosynthesis and metabolism of grape volatile *** review summarizes current findings regarding the genetic bases of grape and wine aroma with an aim towards highlighting areas in need of further *** the literature,we compiled a list of functionally characterized genes involved in berry aroma biosynthesis and present them with their corresponding annotation in the grape reference genome.

关键词： Grape aroma metabolism

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A conserved Puccinia striiformis effector interacts with wheat NPR1 and reduces induction of pathogenesis-relatedgenes in response to pathogens

A conserved Puccinia striiformis effector interacts with whe...

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中国植物病理学会2016年学术年会

作者： WANG Xiao-dong YANG Bao-ju LI Kun KANG Zhen-sheng dario cantu Jorge Dubcovsky Department of Plant Science University of California State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection Northwest Agriculture and Forestry University Department of Plant Pathology Agriculture University of Hebei Department of Viticulture and Enology University of CaliforniaDavisCA 95616USA.5.Howard Hughes Medical Institute(HHMI)Chevy Chase

In Arabidopsis,NPR1 is a key transcriptional co-regulator of systemic acquired *** pathogen challenge,NPR1 translocates from the cytoplasm to the nucleus,where it interacts with TGA-bZIP transcription factors to activate the expression of several pathogenesis-related *** a screen of a yeast two-hybrid library from wheat leaves infected with ***,we identified a conserved rust effector that interacts with wheat NPR1 and named it Puccinia NPR1 interactor（PNPi）.PNPi interacts with the NPR1/NIM1-like domain of NPR1 via its C-terminal *** bimolecular fluorescence complementation assays,we detected the interaction between PNPi and wheat NPR1 in the nucleus of Nicotiana benthamiana protoplasts.A yeast three-hybrid assay showed that PNPi interaction with NPR1 competes with the interaction between wheat NPR1 and *** barley transgenic lines over expressing PNPi,we observed reduced induction of multiple PR genes in the region adjacent to Pseudomonas *** DC3000 *** on these results,we hypothesize that PNPi has a role in manipulating wheat defense response via its interactions with NPR1.

关键词： Wheat Stripe rust NPR1 Pathogen effector Yeast two-hybrid Bimolecular fluorescence complementation Transgenic barley

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Comparative transcriptomics of Central Asian Vitis vinifera accessions reveals distinct defense strategies against powdery mildew

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Horticulture Research 2015年第1期2卷 143-153页

作者： Katherine C H Amrine Barbara Blanco-Ulate Summaira Riaz Dániel Pap Laura Jones Rosa Figueroa-Balderas M Andrew Walker dario cantu Department of Viticulture and Enology University of CaliforniaDavisDavis95616CAUSA Department of Genetics and Plant Breeding Corvinus University of BudapestVillányiút 29-341118BudapestHungary

Grape powdery mildew(PM),caused by the biotrophic ascomycete Erysiphe necator,is a devastating fungal disease that affects most Vitis vinifera *** have previously identified a panel of *** accessions from Central Asia with partial resistance to PM that possess a Ren1-like local *** this study,we show that in addition to the typical Ren1-associated late post-penetration resistance,these accessions display a range of different levels of disease development suggesting that alternative alleles or additional genes contribute to determining the outcome of the interaction with the *** identify potential Ren1-dependent transcriptional responses and functions associated with the different levels of resistance,we sequenced and analyzed the transcriptomes of these Central Asian accessions at two time points of PM *** were compared to identify constitutive differences and PM-inducible responses that may underlie their disease resistant *** to *** in all resistant accessions were characterized by an early up-regulation of 13 genes,most encoding putative defense functions,and a late down-regulation of 32 genes,enriched in transcriptional regulators and protein *** Ren1-dependent responses included a hotspot of co-regulated genes on chromosome *** also identified 81 genes whose expression levels and dynamics correlated with the phenotypic differences between the most resistant accessions‘Karadzhandahal’,DVIT3351.27,and O34-16 and the other *** study provides a first exploration of the functions associated with varying levels of partial resistance to PM in *** accessions that can be exploited as sources of genetic resistance in grape breeding programs.

关键词： breeding mildew cultivar

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