Document Detail


Multiple layers of incompatibility to the parasitic witchweed, Striga hermonthica.
MedLine Citation:
PMID:  19402875     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
* Witchweeds (Striga spp.) are major agricultural pests that infest important crops in sub-Saharan Africa. Striga hermonthica parasitizes gramineous plants including sorghum, maize and rice, but not dicots. To understand host recognition mechanisms of S. hermonthica, we investigated its interaction with nonhost dicots including Arabidopsis, cowpea, Lotus japonicus and Phtheirospermum japonicum, a hemiparasite. * Striga hermonthica seeds were pretreated with strigol, a germination stimulant, and allowed to germinate next to a potential host root. We characterized the histological phenotype of the interactions. Moreover, we monitored the infection of a host rice and the nonhost P. japonicum by S. hermonthica using time-lapse photography. * All nonhost dicots tested did not support S. hermonthica shoot growth beyond the six leaf-pair stage; however, the arrest of parasite development occurred at different stages. Striga hermonthica haustoria were able to reach the steles of Arabidopsis and cowpea, while L. japonicus blocked S. hermonthica infection in the root cortex. Striga hermonthica often failed to penetrate P. japonicum roots. * Our analysis indicates that there are at least four types of incompatible interaction to S. hermonthica. Combinations of these different incompatibility mechanisms contribute to the total resistance to S. hermonthica.
Authors:
Satoko Yoshida; Ken Shirasu
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-04-14
Journal Detail:
Title:  The New phytologist     Volume:  183     ISSN:  1469-8137     ISO Abbreviation:  New Phytol.     Publication Date:  2009  
Date Detail:
Created Date:  2009-06-26     Completed Date:  2009-11-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882884     Medline TA:  New Phytol     Country:  England    
Other Details:
Languages:  eng     Pagination:  180-9     Citation Subset:  IM    
Affiliation:
RIKEN, Plant Science Center, Tsurumi-ku, Yokohama, Japan.
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MeSH Terms
Descriptor/Qualifier:
Angiosperms / parasitology*
Host-Parasite Interactions*
Lactones
Oryza sativa / parasitology
Plant Diseases / parasitology
Plant Roots / parasitology
Plant Shoots / growth & development
Striga / growth & development*
Chemical
Reg. No./Substance:
0/Lactones; 0/strigol

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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