File:Didymella rabiei (Chickpea ascochyta blight fungus).jpg
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Summary
[edit]DescriptionDidymella rabiei (Chickpea ascochyta blight fungus).jpg |
English: Ascochyta blight caused by the fungal pathogen Didymella rabiei/Ascochyta rabiei/Mycosphaerella rabiei is a devastating disease of chickpea. Our research has been searching for management solutions of this disease by identifying resistance sources, testing effective fungicides and investigating pathogenic mechanisms. The pathogen produces toxin solanapyrones and the toxins were thought to be important to disease development. In one study of ours recently published in Molecular Plant-Microbe Interactions, we generated mutants of Ascochyta that could not produce the toxin anymore. The mutants caused disease on chickpea just as well as the original isolate of the pathogen that was able to produce the toxins, demonstrating that the solanapyrone toxins are not required for pathogenicity. These toxins must play other important roles in the pathogen ecology. |
Date | |
Source | http://www.ars.usda.gov/images/docs/25833_26059/Chen-Exhibit%20A%20(Ascochyta%20blight).jpg |
Author |
Dr. Weidong Chen Research Plant Pathologist |
Licensing
[edit]Public domainPublic domainfalsefalse |
This image or file is a work of a United States Department of Agriculture employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain.
English ∙ español ∙ Nederlands ∙ slovenščina ∙ Tiếng Việt ∙ македонски ∙ русский ∙ українська ∙ 日本語 ∙ +/− |
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Camera manufacturer | Canon |
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Exposure time | 1/500 sec (0.002) |
F-number | f/4 |
Date and time of data generation | 13:46, 13 April 2007 |
Lens focal length | 5.8 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
File change date and time | 13:46, 13 April 2007 |
Y and C positioning | Centered |
Exif version | 2.2 |
Date and time of digitizing | 13:46, 13 April 2007 |
Meaning of each component |
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APEX shutter speed | 8.96875 |
APEX aperture | 4 |
APEX exposure bias | 0 |
Maximum land aperture | 2.96875 APEX (f/2.8) |
Metering mode | Pattern |
Flash | Flash did not fire, auto mode |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 13,653.333333333 |
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Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
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White balance | Auto white balance |
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Scene capture type | Standard |