Update of the Xylella spp. host plant database

Abstract

Following a request from the European Commission, EFSA periodically updates the database on the host plants of Xylella spp. While previous editions of the database (2015 and 2016) dealt with the species Xylella fastidiosa only, this database version addresses the whole genus Xylella, including therefore both species X. fastidiosa and Xylella taiwanensis. The database now includes information on host plants of Xylella spp. retrieved from scientific literature up to November 2017 and from EUROPHYT notifications up to May 2018. An extensive literature search was performed to screen the scientific and technical literature published between the previous database update conducted in December 2015 and December 2017. The literature screening was supported by the DistillerSR software platform. The applied protocol for the extensive literature review and extensive information search, together with examples of data extraction, are described in detail in this report. This report also includes published information on resistance or tolerance of plant varieties to Xylella spp. The current database includes 563 plant species reported to be infected by X. fastidiosa, of which for 312 plant species the infection has been determined with at least two different detection methods. These species cover hundreds of host plant genera in 82 botanical families (61 botanical families when considering only records with at least two different detection methods). The update of this database of host plants of Xylella spp. reported world‐wide provides a key tool for risk management, risk assessment and research on this polyphagous bacterial plant pathogen.

A non-targeted metabolomics study on Xylella fastidiosa infected olive plants grown under controlled conditions

“…OQDS is caused by a quarantine bacterial pathogen, Xylella fastidiosa, of American origin, belonging to the EPPO A.2 list 2 , 3 . X. fastidiosa is a Gram-negative xylem-limited bacterium that has a wide host range 4 and causes a number of diseases of economically important crops, such as Pierce’s disease of grapevine, plum leaf scald, phony peach, almond leaf scorch, citrus variegated chlorosis and coffee leaf scorch 5 . X. fastidiosa is classified into three formally accepted subspecies, namely fastidiosa , multiplex and pauca 6 .…”

Complete genome sequence ofXylella taiwanensisand comparative analysis of virulence gene content withXylella fastidiosa

“…The gammaproteobacterium Xylella fastidiosa ( Xf ) is a xylem-limited and fastidious plant pathogen (Wells et al 1987). To date, more than 563 plant species in 82 families have been reported as hosts for Xf (European Food Safety Authority 2018). Xf could be classified into at least five subspecies; some of the notable examples include Xf subspecies fastidiosa ( Xff ) that causes Pierce’s Disease (PD) of grapevine, Xf subspecies pauca ( Xfp ) that causes citrus variegated chlorosis (CVC) and olive quick decline syndrome (OQDS), and Xf subspecies sandyi ( Xfs ) that causes oleander leaf scorch (OLS).…”

Novel Tetraplex Quantitative PCR Assays for Simultaneous Detection and Identification of Xylella fastidiosa Subspecies in Plant Tissues

“…Xylella fastidiosa (Xf) is a worldwide insect-transmitted plantpathogenic bacterium that presents a very large host range. Altogether, 563 plant species grouped into 82 botanical families have been reported as Xf hosts (EFSA, 2018a). Plants with a major socio-economic interest such as grapevine, citrus, coffee, and olive trees are hosts of Xf (EFSA, 2018a).…”

“…Plants with a major socio-economic interest such as grapevine, citrus, coffee, and olive trees are hosts of Xf (EFSA, 2018a). Forest trees, shade trees, ornamentals, and landscape species are included in the host plant database making this pathogen a potential worldwide threat (EFSA, 2018a). Disease management of Xf is impeded by its asymptomatic period that can last several years (EFSA, 2018b).…”