Journal für Kulturpflanzen - Journal of Cultivated Plants (2013) 65, 19-23

Maike Elfert, Detlef Ulrich, Michael Fischer, Christoph Hoffmann and Thomas Strumpf (2013)
Auf der Suche nach Biomarkern im Weinblattmetabolom
[Searching for biomarkers in the grape leaf metabolome]
Journal für Kulturpflanzen - Journal of Cultivated Plants 65 (1), 19-23
Abstract: Powdery and downy mildew of grapevine are widespread diseases, which may cause severe harvest losses. In organic farming only copper containing fungicides are permitted. In relation to the longtime application of copper containing plant protection products the impact of copper deposit in soil and its effect to soil organisms are discussed nationally and internationally. Therefore, developing alternative plant protection strategies is an important field of research. Thus, the metabolite profiles of resistant grapevine species (American wild type species and old hybrid grapevine varieties) are compared during a triennial survey with representatives of the more susceptible European grapevine cultivars by non-targeted analysis assays. This might give some hints to so far unknown resistance biomarkers or elicitors. The different volatile organic compounds (VOCs) of the leaf metabolome were analyzed by headspace-SPME-GC-MS. In an annual survey 81 out of 120 volatiles detected in grapevine leaves were identified.Though many of the components are included in several individual species and varieties, there are detectable differences with respect to their quality and quantity.Multivariate statistical data processing (PCA) showed that both the leaf development stadium and the grapevine species (resp. variety) have a great impact on the volatile profile. In contrast, the distinctions in the metabolomes of different plants which belong to the same variety are less obvious.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: German)
Database assignments for author(s): Christoph Hoffmann, Michael Fischer

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Plasmopara viticola	Grapevine (Vitis)	Germany