NDLI: Presymptomatic detection of powdery mildew infection in winter wheat cultivars by laser-induced fluorescence.

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Presymptomatic detection of powdery mildew infection in winter wheat cultivars by laser-induced fluorescence.

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Presymptomatic detection of powdery mildew infection in winter wheat cultivars by laser-induced fluorescence.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Bürling, Kathrin Hunsche, Mauricio Noga, Georg
Description	Country affiliation: Germany Author Affiliation: Bürling K ( University of Bonn, Institute of Crop Science and Resource Conservation-Horticultural Science, Auf dem Huegel 6, D-53121 Bonn, Germany.)
Abstract	The sensor-based monitoring of diseases under controlled conditions establishes an objective tool that allows a better understanding of the pathogen-plant interactions in different situations. The purpose of our work was to implement the presymptomatic detection of powdery mildew on wheat leaves shortly after fungus inoculation by spectral and time-resolved laser-induced fluorescence spectroscopy. In the general scope of plant phenotyping, we hypothesized that it is possible to discriminate between wheat genotypes that are either resistant or susceptible to powdery mildew. According to our results, the presymptomatic detection of powdery mildew on wheat leaves was accomplished, irrespective of genotype, as early as one day after inoculation using the fluorescence amplitude ratio F451:F522. Similarly, the ratios F451:F522, F522:F687, and F522:F736 of the half-bandwidth are also appropriate parameters. Furthermore, in the spectral range between 410 nm and 620 nm, the mean lifetime was significantly longer in inoculated leaves than it was in control leaves. Finally, the short-term (10-12 hour) increase of the fluorescence mean lifetime at 530 nm and 560 nm following the inoculation suggests that the speed of the plant reaction might be associated to its resistance to the pathogen. Based on this information, we conclude that determinations of ultraviolet, laser-induced fluorescence intensity and lifetime are suitable approaches to presymptomatically detect powdery mildew on wheat leaves one day after inoculation.
File Format	HTM / HTML
ISSN	00037028
Issue Number	12
Volume Number	66
e-ISSN	19433530
Journal	Applied Spectroscopy
Language	English
Publisher	Sage Publication
Publisher Date	2012-12-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Imaging Discipline Analytical Chemistry Discipline Radiology Ascomycota Chemistry Plant Diseases Microbiology Spectrometry, Fluorescence Methods Triticum Analysis Of Variance Isolation & Purification Phenotype Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Instrumentation

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