Plant Hosts of Xylella fastidiosa In and Near Southern California Vineyards

Plant Disease
H S CostaD A Cooksey

Abstract

Xylella fastidiosa is a xylem-limited bacterium that causes Pierce's disease (PD) of grapevines. A variety of plant species found near a severe outbreak of PD in vineyards in the Temecula Valley of California were tested using enzyme-linked immunosorbent assay, culture on media, and polymerase chain reaction to identify potential inoculum sources in the area. Species that consistently tested positive for X. fastidiosa were the known hosts, grape, almond, and oleander, and two new hosts, Spanish broom (Spartium junceum) and wild mustard (Brassica spp). Sequence analysis of the 16S-23S rRNA spacer region found that strains isolated from grapevine, Spanish broom, wild mustard, and almond clustered with previously sequenced PD strains. Thus, these species could serve as sources of inoculum for infection of grapevines and should be removed or monitored for signs of infection. Sequences from oleander isolates from Temecula formed another cluster with a previously published oleander strain sequence. Oleander strains do not infect grapevines and thus do not appear to cause a direct threat to grapevines. Two additional isolates from almond were determined to be genetically different from PD strains, and the ability of these strains to i...Continue Reading

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Citations

Feb 17, 2009·Applied and Environmental Microbiology·Xiang Yang ShiDonald A Cooksey
Sep 11, 2007·Applied and Environmental Microbiology·Xiang Yang ShiDonald A Cooksey
Jan 15, 2010·FEMS Microbiology Letters·Xiangyang ShiDonald A Cooksey
Jul 1, 2006·Plant Disease·Elaine B ShaplandMario A Viveros
Jan 29, 2013·Applied and Environmental Microbiology·Leonard NunneyRichard Stouthamer
Sep 1, 2014·Plant Disease·Rodrigo KrugnerMarshall W Johnson
Oct 17, 2007·FEMS Microbiology Letters·Blake Bextine, Beth Child
Sep 28, 2018·Frontiers in Microbiology·Ifigeneia KyrkouLars Hestbjerg Hansen
Sep 10, 2018·EFSA Journal·UNKNOWN European Food Safety Authority (EFSA)
Apr 22, 2008·Annual Review of Phytopathology·Subhadeep ChatterjeeSteven Lindow

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