Typical appressorium of Phakopsora pachyrhizi. Appressorium (top) arising from germinating urediniospore (bottom).
Breno Leite, Jim Marois, and David Wright NFREC-IFAS- University of Florida. Email: bleite@ufl.edu
Dark field image shows the typical appressorium formed by Phakopsora pachyrhizi. Image was obtained through the use of an artificial hydrophobic surface polystyrene covered slide (Leite, B. & Nicholson, R.L. 1992. Exp. Mycology 16: 76-86). The Southeast is the first U.S. landfall site for numerous documented plant and animal diseases. ASR (Asian Soybean Rust) was on the USDA's "select agent" list, and had not been reported in the U.S. until November 6, 2004. Hurricane Ivan is believed to be the means by which ASR entered the U.S. ASR is now established in Florida and threatens our national soybean industry. ASR cannot be eradicated and it infects over 90 legume species. UF/IFAS has joined the other southeastern States to track its survival and movement on a regular basis and provide information to the national soybean industry for management decisions. Long-term, sustainable solutions to the control of this disease must be developed. This is a model plant host system for pests and diseases that threaten our nation's agriculture.
Picture your photograph as the APSnet Featured ImageClick here to find out more
License to Copy. This notice hereby grants permission to APSnet users to copy the image featured for noncommercial, personal use. All components of APSnet are copyrighted and may not be reproduced or distributed except by express permission of APS. Copyright is not claimed for material provided by United States government employees as part of their work. APSnet copyright extends to images, text, graphics, photographs, illustrations, audio, video, computer software, and all other elements of the site.Instructions to Copy. For PC, position your mouse cursor on the featured image, click the right mouse button, and choose "Save Picture As..." or "Save this Image as..." whichever is the case. For Mac, click the only mouse button and follow the same steps. Users may want to set up a specific directory and file naming scheme for storing images; otherwise, they will be saved using your system defaults. Images may be used in any software application that supports JPEG file format or viewed in an Internet browser as local files.