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Abstract Detail

Life after Arabidopsis thaliana: Using non-model organisms to understand species interactions

Kariyat, Rupesh [1].

Effects of inbreeding on plant-insect interactions in horsenettle- (Solanum carolinense L).

Solanum carolinense L. (Solanaceae) a native herbaceous perennial weed has been found to exhibit inbreeding depression under lab and field conditions. Here we present a synthesis of our work on the effects of inbreeding on plant defences in horsenettle, and the molecular mechanisms underlying plant-insect interactions. We employed inbred and outbred progenies of horsenettle to examine how inbreeding and herbivory affects structural (spines, trichomes) and chemical (plant volatiles and tritrophic interactions) defences. This was followed by examining how herbivore (tobacco hornworm- Manduca sexta L) behavior (feeding and oviposition preference), development and dispersal are also affected. Our results clearly demonstrate that inbreeding negatively affects constitutive and induced plant defences, and herbivores tend to selectively choose to feed, oviposit, and develop faster on inbred plants. Our microarray analyses demonstrate that herbivore damage up-regulates numerous genes in defense pathways while down-regulating several general growth and photosynthesis-related genes, and the analysis of damaged inbred and outbred plants showed that inbreeding affects the pattern of gene expression and that outbred plants have significantly greater expression of genes involved in defense pathways, than inbred plants- providing clues into the genetic causes of the differences plant defence traits.

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1 - Swiss Federal Institute of Technology, Biocommunication and Ecology, Lfo G 22 , Schmelzbergstrasse 9, Zurich, 8092, Switzerland

none specified

Presentation Type: Symposium or Colloquium Presentation
Session: SY10
Location: Pines North/Boise Centre
Date: Wednesday, July 30th, 2014
Time: 4:15 PM
Number: SY10007
Abstract ID:617
Candidate for Awards:None

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