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Prevalence and molecular diversity of reniform nematodes of the genus Rotylenchulus (Nematoda: Rotylenchulinae) in the Mediterranean Basin

AuthorsPalomares Rius, Juan E. ; Cantalapiedra-Navarrete, C. ; Archidona-Yuste, Antonio; Tzortzakakis, E. A.; Birmpilis, I. G.; Vovlas, Nicola; Subbotin, Sergei A.; Castillo, Pablo
KeywordsCytochrome c oxidase subunit 1
D2-D3 region
R. macrodoratus
R. Macrosoma
R. reniformis
Issue DateFeb-2018
PublisherSpringer Nature
CitationEuropean Journal of Plant Pathology 150(2): 439-455 (2018)
AbstractThe reniform nematodes of the genus Rotylenchulus are semi-endoparasites of numerous herbaceous and woody plant roots and distributed in regions with Mediterranean, subtropical and tropical climates. In this study, we provide morphological and molecular characterisation of three out of 11 valid species of the genus Rotylenchulus: R. macrodoratus, R. macrosoma, and R. reniformis from Greece (Crete), Italy and Spain. The overall prevalence of reniform nematodes in wild and cultivated olives in Greece, Italy, and Spain was 11.5%, 19.0% and 0.6%, respectively. In Greece, R. macrodoratus and R. macrosoma were detected in cultivated olive with a prevalence of 8.2% and 6.2%, respectively, but none of them were found in wild olive. This is the first report of R. macrosoma in Greece. Only one reniform nematode species was detected in olive from Italy and Spain, viz. R. macrodoratus and R. macrosoma, respectively. The parasitism of R. macrosoma on hazelnut in northern Spain was also confirmed for the first time. This study demonstrates that R. macrodoratus and R. macrosoma have two distinct rRNA gene types in their genomes, specifically the two types of D2-D3 for R. macrosoma and R. macrodoratus, the two types of ITS for R. macrodoratus and the testing of the ITS variability in other R. macrosoma populations in different countries. Rotylenchulus macrosoma from Greece and Spain showed differences in nucleotide sequences in the ITS region and D2-D3 of 28S rRNA gene.
Publisher version (URL)https://doi.org/10.1007/s10658-017-1292-8
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