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United States Department of Agriculture

Agricultural Research Service

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Image Number K8687-2

Searching for molecular signals involved in viriod movement and disease-causing activity, molecular biologist Yan Zhao and plant pathologist Rosemarie Hammond examine a tomato plant infected with potato spindle tuber viriod.

Photo by Peggy Greb.

640 pixels wide: (k8687-2.jpg)

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Last Modified: 5/23/2006