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Disease report/Rapport des maladies

Alternaria species infecting potato in southern China

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Pages 312-317 | Accepted 27 Mar 2018, Published online: 11 May 2018
 

Abstract

Potato leaves with symptoms of foliar diseases were collected from eight different geographical areas in southern China. A total of 109 Alternaria isolates were recovered and identified to three species according to morphological characteristics, nucleotide sequencing and PCR-RFLP analysis. Three Alternaria species were recovered, of which A. tenuissima was the most common, followed by A. alternata and A. solani. Pathogenicity tests indicated that all species caused foliar symptoms on potato cultivar ‘Favorite’. Compared with earlier results reported in 2010–2013 in northern China, the proportion of A. alternata isolates was notably increased, while the number of A. solani isolates was lower. This study provides a survey of the Alternaria species composition associated with potato foliar diseases in southern China.

Résumé

Des feuilles de pomme de terre affichant des signes de maladies foliaires ont été collectées dans huit régions différentes du sud de la Chine. En tout, 109 isolats d’Alternaria ont été recueillis et identifiés à 3 espèces en fonction de leurs caractéristiques morphologiques, du séquençage des nucléotides et de l’analyse PCR-RFLP. Trois espèces d’Alternaria ont été récupérées, parmi lesquelles A. tenuissima était la plus courante, suivie d’A. alternata et d’A. solani. Des tests de pathogénicité ont indiqué que toutes les espèces causaient des symptômes de maladies foliaires sur le cultivar de pomme de terre ‘Favorite’. Comparativement aux résultats précédents provenant du nord de la Chine en 2010–2013, la proportion d’isolats d’A. alternata s’était substantiellement accrue, tandis que le nombre d’isolats d’A. solani avait diminué. Cette étude passe en revue la composition des espèces d’Alternaria associées aux maladies foliaires de la pomme de terre dans le sud de la Chine.

Acknowledgements

This work was supported by Chinese Universities Scientific Fund (2015NX005). Mention of trade names or commercial products in this report is solely for the purpose of providing specific information and does not imply recommendation or endorsement.

Supplemental material

Supplemental data for this article can be accessed https://doi.org/10.1080/07060661.2018.1459850.

Additional information

Funding

This work was supported by the Chinese Universities Scientific Fund [grant number 2015NX005].

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