Show simple item record

dc.contributor.authorHolland, Renee Marie
dc.date.accessioned2014-03-04T21:02:00Z
dc.date.available2014-03-04T21:02:00Z
dc.date.issued2013-05
dc.identifier.otherholland_renee_m_201305_ms
dc.identifier.urihttp://purl.galileo.usg.edu/uga_etd/holland_renee_m_201305_ms
dc.identifier.urihttp://hdl.handle.net/10724/28760
dc.description.abstractBacterial leaf scorch is an emerging disease of southern highbush blueberry caused by the xylem-limited bacterium Xylella fastidiosa. This thesis investigated 1) the distribution of the pathogen in stem and root sections of naturally infected blueberry plants; 2) the level of disease transmission through vegetative propagation; and 3) the association between disease resistance and xylem hydraulic conductance in three blueberry cultivars. The pathogen was detected readily in xylem sap from lower stem sections of affected plants, and as disease severity increased, bacterial titer increased in sections of all age classes, particularly root sections. Disease transmission through softwood cuttings from symptomatic mother plants was low but non-negligible (5.1% average). Emerald, a field-resistant cultivar, had higher levels of xylem hydraulic conductance than the susceptible Star and FL 89-16. In diseased plants of FL 89-16, petiole conductance was reduced significantly, potentially explaining the high propensity for leaf scorch-related plant death in this cultivar.
dc.languageeng
dc.publisheruga
dc.rightspublic
dc.subjectXylella fastidiosa
dc.subjectbacterial leaf scorch
dc.subjectblueberry
dc.subjectVaccinium corymbosum
dc.titleLocation, transmission, and impact of Xylella fastidiosa in southern highbush blueberries
dc.typeThesis
dc.description.degreeMS
dc.description.departmentPlant Pathology
dc.description.majorPlant Pathology
dc.description.advisorHarald Scherm
dc.description.committeeHarald Scherm
dc.description.committeeRobert O. Teskey
dc.description.committeePhillip Brannen


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record