First detection of the presence of naturally occurring grapevine downy mildew in the field by a fluorescence-based method

Early detection of fungal pathogen presence in the field would help to better time or avoid some of the fungicide treatments used to prevent crop production losses. We recently introduced a new phytoalexin-based method for a non-invasive detection of crop diseases using their fluorescence. The causa...

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Bibliographic Details
Published in:Photochemical & photobiological sciences 2015-10, Vol.14 (10), p.1807-1813
Main Authors: Latouche, Gwendal, Debord, Christian, Raynal, Marc, Milhade, Charlotte, Cerovic, Zoran G.
Format: Article
Language:English
Subjects:
Biochemistry
Biomaterials
Chemistry
Communication
Fluorometry - methods
Fungi, Unclassified - isolation & purification
Fungi, Unclassified - physiology
Physical Chemistry
Plant Diseases - microbiology
Plant Sciences
Plasmopara viticola
Time Factors
Vitaceae
Vitis - microbiology
Vitis vinifera
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Summary:Early detection of fungal pathogen presence in the field would help to better time or avoid some of the fungicide treatments used to prevent crop production losses. We recently introduced a new phytoalexin-based method for a non-invasive detection of crop diseases using their fluorescence. The causal agent of grapevine downy mildew, Plasmopara viticola , induces the synthesis of stilbenoid phytoalexins by the host, Vitis vinifera , early upon infection. These stilbenoids emit violet-blue fluorescence under UV light. A hand-held solid-state UV-LED-based field fluorimeter, named Multiplex 330, was used to measure stilbenoid phytoalexins in a vineyard. It allowed us to non-destructively detect and monitor the naturally occurring downy mildew infections on leaves in the field.
ISSN:1474-905X
1474-9092
DOI:10.1039/c5pp00121h