Abstract
Currently, kiwifruit cultivation arouses great economic interest in the agricultural sector in several countries of the European Union due to high consumer demand and good results achieved in terms of production potential and fruit quality. One of the main bacterial species that cause yield losses in kiwifruit plants is Pseudomonas syringae. Diseases such as bacterial canker, caused by pathovar (pv.) actinidiae; floral bud necrosis caused by pv. syringae and leaf spots caused by pv. actinidifoliorum (Pfm) are clear examples. Between 2014 and 2017, in the main kiwifruit producing areas in the north and east of Spain, several surveys were carried out in search of these pathogens. Analyses realized from symptomatic and asymptomatic plants of Actinidiadeliciosa revealed the existence of new bacterial isolates close to Pfm. These new isolates werelow virulence pathogens similar to Pfm but belonging to a new group of P. syringae that affected the leaves of A. chinensis var. deliciosa. This study focused on the characterization and classification of these new isolates by a polyphasic approach in order to provide more information for understanding how the different populations of P.syringae affecting kiwifruit. They had the phenotypic characteristics of Pfm but by molecular approaches, they constituted a supported genetic lineage closely-related to Pfm independent of the five lineages described so far. This work revealed the great diversity found in P. syringae species affecting kiwifruit plants and supports the hypothesis that Pfm is a low virulence pathogen which is long established in Europe.
Highlights
IntroductionActinidiae is one of over 60 P. syringae described pathovars and is subject to emergency measures that aim to prevent further spread of the pathogen in the European Union (EU) [1]
More than 200 species were described within the genus Pseudomonas [54], whose classification methods have always been controversial
The current P. syringae complex encompasses over 60 pathogenic variants with different host ranges
Summary
Actinidiae is one of over 60 P. syringae described pathovars and is subject to emergency measures that aim to prevent further spread of the pathogen in the European Union (EU) [1]. Bacterial canker of kiwifruit is an economically important disease caused by Pseudomonas syringae pv. It was reported for the first time in 1989 in Japan [2], in China (1992) [3] and the same year in Korea and Italy [4,5]. From 2008, this bacterium was detected in several countries such as New Zealand [6], France [7], Spain [8], Portugal [9] Chile [10], Australia [10], Slovenia [11] and Greece [12]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
