https://scholars.lib.ntu.edu.tw/handle/123456789/626015
標題: | Assessment of Pierce's disease susceptibility in Vitis vinifera cultivars with different pedigrees | 作者: | Deyett E Pouzoulet J JIUE-IN YANG Ashworth V.E Castro C Roper M.C Rolshausen P.E. |
關鍵字: | grapevine; host resistance; host susceptibility; Pierce's disease; Vitis vinifera; Xylella fastidiosa | 公開日期: | 2019 | 卷: | 68 | 期: | 6 | 起(迄)頁: | 1079-1087 | 來源出版物: | Plant Pathology | 摘要: | Pierce's disease (PD) of grapevine is caused by the bacterium Xylella fastidiosa. In this study, an integrated approach was applied to assess PD susceptibility among different Vitis vinifera cultivars that incorporated disease severity, bacterial pathogen abundance and loss of stem xylem hydraulic conductivity. It was hypothesized that levels of PD susceptibility in V. vinifera can be attributed in part to the host anatomical features that are shaped by its pedigree background. Two popular wine grape cultivars were initially selected from the occidentalis group, Merlot and Cabernet Sauvignon, and one from the orientalis group, Thompson Seedless. The more recently bred table grape cultivar Scarlet Royal, that has mixed pedigree parentage, was also included. PD susceptibility was compared to the known PD resistant b43-17 V. arizonica/candicans wild grape species from North America. The data indicated that Thompson Seedless was ranked as the most susceptible to PD because it significantly exhibited the most severe disease symptoms at 12 weeks post-inoculation and hosted the highest X. fastidiosa titre of the cultivars, and lost over 90% of its stem hydraulic conductivity. In contrast, the other three cultivars displayed less susceptibility to PD. The way in which the xylem anatomy could impact PD susceptibility in V. vinifera cultivars is discussed, together with how grape pedigrees and their cognate centre of domestication may have influenced xylem anatomical features. This work provides a reference framework to further test the hypothesis that V. vinifera cultivars with wide xylem vessels may be more prone to PD decline. © 2019 The Authors. Plant Pathology published by John Wiley & Sons Ltd on behalf of British Society for Plant Pathology. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85065028973&doi=10.1111%2fppa.13027&partnerID=40&md5=383f581a4969048648a539cede026fef https://scholars.lib.ntu.edu.tw/handle/123456789/626015 |
ISSN: | 00320862 | DOI: | 10.1111/ppa.13027 | SDG/關鍵字: | assessment method; bacterial disease; cultivar; disease prevalence; disease resistance; disease severity; domestication; host-pathogen interaction; integrated approach; symptom; vine; North America; Bacteria (microorganisms); Vitaceae; Vitis; Vitis vinifera; Xylella fastidiosa |
顯示於: | 植物病理與微生物學系 |
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