| natural infection of alternanthera tenella (amaranthaceae) by a new potyvirus. | a virus was isolated from joyweed (alternanthera tenella colla-amaranthaceae), a common weed in tropical and sub-tropical regions. examination by electron microscopy showed long flexuous particles with an average length of 756 nm in crude sap. serological results showed positive reaction with antisera to pvy-o. a fragment of 1772 nucleotides was sequenced. the cp sequence shares 76% of identity with the cp of potato virus y strain ntn. these results confirm that the virus is a new potyvirus infe ... | 2007 | 17668273 |