Document Detail


Vascular Occlusions in Grapevines with Pierce's Disease Make Disease Symptom Development Worse.
MedLine Citation:
PMID:  23292789     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Vascular occlusions are common structural modifications made by many plant species in response to pathogen infection. However, the functional role(s) of occlusions in host plant disease resistance/susceptibility remains controversial. This study focuses on vascular occlusions that form in stem secondary xylem of grapevines infected with Pierce's disease (PD) and the impact of occlusions on the hosts' water transport and the systemic spread of the causal bacterium Xylella fastidiosa in infected vines. Tyloses are the predominant type of occlusion that forms in grapevine genotypes with differing PD resistances. Tyloses form throughout PD-susceptible grapevines with over 60% of the vessels in transverse sections of all examined internodes becoming fully blocked. In sharp contrast, tylose development was mainly limited to a few internodes close to the point of inoculation in PD-resistant grapevines, impacting only 20% or less of the vessels. The extensive vessel blockage in PD-susceptible grapevines was correlated to an over 90% decrease in stem hydraulic conductivity, compared to an approximately 30% reduction in the stems of PD-resistant vines. Despite the systemic spread of X. fastidiosa in PD-susceptible grapevines, the pathogen colonized only 15% or less of the vessels in any internode and occurred in relatively small numbers, amounts much too small to directly block the vessels. Therefore we concluded that the extensive formation of vascular occlusions in PD-susceptible grapevines does not prevent the pathogen's systemic spread in them, but may significantly suppress the vines' water conduction, contributing to PD symptom development and the vines' eventual death.
Authors:
Qiang Sun; Yuliang Sun; Andrew Walker; John M Labavitch
Related Documents :
21594549 - Thoracic vertebral osteomyelitis with paraspinous mass and intraspinal extension: an at...
23473219 - Human cases of wesselsbron disease, south africa 2010-2011.
23935379 - Genetic variants associated with crohn's disease.
23625339 - Development of an epstein-barr virus-associated lymphoproliferative disorder in a patie...
22195289 - Inflammatory bowel disease in hispanics: the university of puerto rico ibd registry.
21757969 - Diagnostic validity of serum macrophage inhibitor cytokine and tissue polypeptide-speci...
18404479 - E-ntpdases in human airways: regulation and relevance for chronic lung diseases.
3804549 - Human notoedric scabies from contact with cats infested with notoedres cati.
10319879 - The role of inheritance in sporadic parkinson's disease: evidence from a longitudinal s...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-7
Journal Detail:
Title:  Plant physiology     Volume:  -     ISSN:  1532-2548     ISO Abbreviation:  Plant Physiol.     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-8     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401224     Medline TA:  Plant Physiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
1 University of Wisconsin - Stevens Point;
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

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


Previous Document:  Network inference analysis identifies an APRR2-like gene linked to pigment accumulation in tomato an...
Next Document:  Constitutive expression of a miR319 gene alters plant development and enhances salt and drought tole...