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SUMMARY:Virus-mediated interactions between aphids and beans - Francis Wam
 onje
DTSTART:20131115T133000Z
DTEND:20131115T135500Z
UID:TALK48220@talks.cam.ac.uk
CONTACT:Megan Cooper
DESCRIPTION:The potyviruses Bean common mosaic virus (BCMV) and bean commo
 n mosaic necrotic virus (BCMNV)\, and to a lesser extent cucumber mosaic v
 irus (a cucumovirus) are major constraints to bean production in Africa. B
 eans are important because they can be inter-cropped with other crops savi
 ng on space and fertilizer due to their ability to fix nitrogen naturally.
  Nutritionally\, beans also constitute a substantial part of the protein i
 ntake. Unfortunately\, genetic options for virus control are limited becau
 se plants carrying a major dominantly inherited resistance gene to BCMV ar
 e susceptible to systemic necrosis induction by BCMNV\, which is endemic i
 n Africa. Recessive resistance genes are too strain-specific to provide br
 oad resistance.\n  BCMV and BCMNV are both transmitted by aphids. Aphid-tr
 ansmitted viruses prove increasingly problematic due to the evolution of p
 esticide resistance in aphids and increases in the geographical range of a
 phids and the viruses they spread due to climate change. \n  Previous stud
 ies with CMV\, and the potyvirus potato virus Y (PVY) in model plants (tob
 acco and Arabidopsis thaliana) and crops (potato) have shown that virus in
 fection affects aphid behaviour by altering the attractiveness of the plan
 t host. Based on the results and the techniques developed from these studi
 es we shall seek to understand more about how BCMV\, BCMNV and CMV influen
 ce bean-aphid interactions. I present preliminary data on free choice expe
 riments carried out using a bean specialist aphid (Aphis fabae) and a gene
 ralist (Myzus persicae) on BCMV and\, BCMNV infected beans and this how af
 fects aphid behaviour. \n
LOCATION:Department of Plant Sciences\, Large Lecture Theatre
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