Plant Physiol. Drug Metab Dispos
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
QUICK SEARCH:   [advanced]


     

Plant Physiology Preview
Published on January 9, 2008; 10.1104/pp.107.111971

OPEN ACCESS ARTICLE
This Article
Free via Open Access: OA
Right arrow Full Text (Plant Physiology Preview (PDF))
Right arrow Supplemental Data
Right arrowOA All Versions of this Article:
146/3/996    most recent
pp.107.111971v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Gao, L.-L.
Right arrow Articles by Singh, K. B.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Gao, L.-L.
Right arrow Articles by Singh, K. B.
Agricola
Right arrow Articles by Gao, L.-L.
Right arrow Articles by Singh, K. B.

Received October 29, 2007
Accepted December 29, 2007

Characterization of pea aphid resistance in Medicago truncatula

Ling-Ling Gao , John P. Klingler , Jonathan P. Anderson , Owain R. Edwards , and Karam B. Singh *

CSIRO Plant Industry and CSIRO Entomology, Private Bag 5, Wembley, WA 6913, Australia

* Corresponding author; email: karam.singh{at}csiro.au.

To achieve a thorough understanding of plant-aphid interactions, it is necessary to investigate in detail both the plant and insect side of the interaction. The pea aphid (PA), Acyrthosiphon pisum has been selected by an international consortium as the model species for genetics and genomics studies, and the model legume Medicago truncatula is a host of this aphid. In this study we identified resistance to pea aphid in a M. truncatula line, Jester, with well-characterized resistance to a closely-related aphid, the bluegreen aphid (A. kondoi). The biology of resistance to the two aphid species shared similarity, with resistance in both cases occurring at the level of the phloem, requiring an intact plant and involving a combination of antixenosis, antibiosis and plant tolerance. In addition, pea aphid resistance co-segregated in Jester with a single dominant gene for bluegreen aphid resistance. These results raised the possibility that both resistances may be mediated by the same mechanism. This was not supported by the results of gene induction studies and resistance induced by bluegreen aphid had no effect on pea aphid feeding. Moreover, different genetic backgrounds containing a bluegreen aphid resistance gene from the same resistance donor, differ in resistance to PA. These results suggest that distinct mechanisms are involved in resistance to these two aphid species. Resistance to pea aphid and bluegreen aphid in the same genetic background in M. truncatula makes this plant an attractive model for the study of both plant and aphid components of resistant and susceptible plant-aphid interactions.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
ASPB Publications PLANT PHYSIOLOGY THE PLANT CELL
Copyright © 2008 by the American Society of Plant Biologists