Planta Daninha (2006) 24, 239-244

I.P. Asssunção, A.F. Listik, M.C.S. Barros, E.P.R. Amorin, S.J.C. Silva, O. Silva Izael, C.E. Ramalho-Neto and G.S.A. Lima (2006)
Diversidade genética de Begomovirus que infectam plantas invasoras na região nordeste
[Genetic diversity of Begomovirus infecting weeds in northeastern Brazil]
Planta Daninha 24 (2), 239-244
Abstract: The genus Begomovirus belongs to the family Geminiviridae and is associated with a wide range of hosts, including many cultivated species such as tomato (Lycopersicon esculentum), dry beans (Phaseolus vulgaris), pepper (Capsicum annuum), cowpea (Vigna unguiculata), cassava (Manihot esculenta), etc., besides many weed species. It has been demonstrated that in some cases weeds act as virus reservoirs for cultivated plants. In the present work, weed samples presenting yellow mosaic, foliar malformation and size reduction were tested by PCR for infection by Begomovirus, using specific degenerate oligonucleotides. Eleven samples corresponding to 10 plant species were collected in the countryside towns in the states of Alagoas, Pernambuco and Bahia. Some plant species such as Herissantia crispa, Waltheria indica and Triumfetta semitriloba are reported for the first time as hosts for Begomovirus. To estimate the genetic diversity of the detected Begomovirus, the amplified products of several isolates were cleaved with each three restriction enzymes, EcoRI, HinfI, and TaqI. Different patterns were observed for the studied isolates, pointing out to a great genetic diversity for these viruses.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
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Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Sida rhombifolia (weed)		Brazil (NE)
	Triumfetta semitriloba (weed)		Brazil (NE)
	Sida spinosa (weed)		Brazil (NE)
	Macroptilium lathyroides (weed)		Brazil (NE)
	Cleome affinis (weed)		Brazil (NE)
	Waltheria indica (weed)		Brazil (NE)
	Herissantia crispa (weed)		Brazil (NE)