Comments on taxonomic status and host association of some Laimaphelenchus spp. (Rhabditida: Aphelenchoidea)

in Nematology
Restricted Access
Get Access to Full Text
Rent on DeepDyve

Have an Access Token?



Enter your access token to activate and access content online.

Please login and go to your personal user account to enter your access token.



Help

Have Institutional Access?



Access content through your institution. Any other coaching guidance?



Connect

Summary

A reverse taxonomic approach for characterisation of several populations of an aphelenchid nematode recovered from declined oak trees in the Zagros forests, Ilam, western Iran, revealed that their 28S rDNA D2-D3 sequences matched two available sequences of the same genomic fragment belonging to two species, Laimaphelenchus belgradiensis and L. hyrcanus. Further morphological studies yielded new morphological traits that had been overlooked in their original descriptions, and a new hypothesis helping to disentangle these taxa, which have the same 28S sequences and the same phylogenetic placement, is proposed. In a similar fashion, the taxonomic status of some other species of the genus having a similar morphology or similar genomic sequences are reviewed. The possibility of proposing new synonyms was evaluated and tentative reasons for the new habitat of the recovered populations of Laimaphelenchus from the Zagros forests discussed.

Nematology

International Journal of Fundamental and Applied Nematological Research

Sections

References

Alvani, S., Mahdikhani-Moghadam, E., Giblin-Davis, R.M. & Pedram, M. (2016). Description of Ektaphelenchus berbericus n. sp. (Rhabditida: Ektaphelenchinae) from eastern Iran. Nematology 18, 1063-1077. DOI: 10.1163/15685411-00003015

Asghari, R. & Eskandari, A. (2014). Morphological and molecular characterization of Laimaphelenchus deconincki (Nematoda: Aphelenchoididae) based on specimens from Iran. Biologia 69, 1172-1178. DOI: 10.2478/s11756-014-0425-1

Asghari, R., Pourjam, E., Heydari, R. & Zhao, Z.Q. (2012). Laimaphelenchus persicus n. sp. (Nematoda: Aphelenchoididae) from Iran. Zootaxa 3325, 59-67. DOI: 10.11646/zootaxa.3915.4.9

Azizi, K., Eskandari, A. & Asghari, R. (2015). Morphological and molecular study of Laimaphelenchus penardi (Steiner, 1914) Filipjev & Schuurmans Stekhoven, 1941 (Nematoda: Aphelenchoididae) from Iran. Acta Zoologica Biologica 67, 345-350. DOI: 10.2478/s11756-014-0425-1

Baujard, P. (1981). Revue taxonomique du genre Laimaphelenchus Fuchs, 1937 et description de Laimaphelenchus pini n. sp. Revue de Nématologie 4, 75-92.

Carta, L.K., Li, S., Skantar, A.M. & Newcombe, G. (2016). Morphological and molecular characterization of two Aphelenchoides endophytic in poplar leaves. Journal of Nematology 48, 28-33.

Doucet, E.M. (1992). A new species of the genus Laimaphelenchus Fuchs, 1937 (Nemata: Aphelenchina). Fundamental and Applied Nematology 15, 1-6.

Douda, O., Zouhar, M., Nováková, E., Mazáková, J. & Ryšánek, P. (2010). Variability of D2/D3 segment sequences of several populations and pathotypes of potato cyst nematodes (Globodera rostochiensis, Globodera pallida). Plant Protection Science 46, 171-180.

Elmiligy, I. & Geraert, E. (1972). Laimaphelenchus deconincki n. sp. (Nematoda: Tylenchida). Biologisch Jaarboek 39, 145-149.

Filipjev, I.N. & Schuurmans Stekhoven Jr, J.H. (1941). A manual of agricultural helminthology. Leiden, The Netherlands, Brill.

Fischer, M. (1894). Über eine Clematis-krankheit. Bericht us dem Physiolischen Laboratorium des Landwirthschaftlichen, Instituts der Universitat Halle 3, 1-11.

Fuchs, A.G. (1937). Neue parasitische und halbparasitische Nematoden bei Borkenkäfern und einige andere Nematoden. I. Teil. Zoologische Jahrbücher, Abteilung für Systematik, Ökologie und Geographie der Tiere 70, 291-380.

Ghobad-Nejhad, M. (2016). Inonotus krawtzewii causes noteworthy damage to oak stands in Zagros, western Asia, with a key to morphologically similar species worldwide. Nordic Journal of Botany 34, 470-474. DOI: 10.1111/njb.01122

Hunt, D.J. (2009). A checklist of the Aphelenchoidea (Nematoda: Tylenchina). Journal of Nematode Morphology and Systematics 10(2008), 99-135.

Huson, D.H. & Scornavacca, C. (2012). Dendroscope 3: an interactive tool for rooted phylogenetic trees and networks. Systematic Biology 61, 1061-1067. DOI: 10.1093/sysbio/sys062

Katoh, K. & Standley, D.M. (2013). MAFFT multiple sequence alignment software version 7: improvements in performance and usability. Molecular Biology and Evolution 30, 772-780. DOI: 10.1093/molbev/mst010

Khan, M.A. (1960). Description of two nematodes, Ektaphelenchus macrostylus n. sp., and Laimaphelenchus ulmi n. sp., with a key to the species of Laimaphelenchus. Canadian Journal of Zoology 38, 91-97.

Larget, B. & Simon, D.L. (1999). Markov chain Monte Carlo algorithms for the Bayesian analysis of phylogenetic trees. Molecular Biology and Evolution 16, 750-759.

Massey, C.L. (1974). Biology and taxonomy of nematode parasites and associates of bark beetles in the United States. USDA Agriculture Handbook No. 446. Washington, DC, USA, US Government Printing Office.

Miraeiz, E., Heydari, R., Tanha Maafi, Z. & Bert, W. (2015). Laimaphelenchus hyrcanus n. sp. (Nematoda: Aphelenchoididae), a new species from northern Iran. Zootaxa 3915, 591-600. DOI: 10.11646/zootaxa.3915.4.9

Negi, S., Kalia, C.D., Walia, K.K. & Bajaj, K.H. (2009). New species of Aphelenchoides Fischer and Laimaphelenchus Fuchs (Nematoda: Aphelenchida) from pine twigs, Himachal Pradesh, India. Indian Journal of Nematology 39, 192-197.

Nylander, J.A.A. (2004). MrModeltest v2. Program distributed by the author. Uppsala University, Uppsala, Sweden, Evolutionary Biology Centre.

Oro, V. (2015). Description of Laimaphelenchus belgradiensis sp. nov. (Nematoda: Aphelenchoididae) and its phylogenetic and systematic position within Aphelenchoidoidea. European Journal of Plant Pathology 142, 13-23. DOI: 10.1007/s10658-014-0585-4

Pedram, M. (2017). Cryptaphelenchus varicaudatus n. sp. (Rhabditida: Ektaphelenchinae) from Tehran Province, Iran. Journal of Nematology 49, 223-230. DOI: 10.21307/jofnem-2017-066

Pedram, M., Roshan-Bakhsh, A., PourjamE., Atighi, M.R., Decraemer, W. & Bagheri, A. (2017). Additional data on Iranian trichodorids (Triplonchida: Trichodoridae) and first record of a rare species, Trichodorus variabilis Roca, 1998. Nematology 16, 121-129. DOI: 10.1163/15685411-00003036

Pourhashemi, M., Jahanbazi Goujani, H., Hoseinzade, J., Bordbar, S.K., Iranmanesh, Y. & Khodakarami, Y. (2017). [The history of oak decline in Zagros forests.] Journal of Iran Nature 2, 30-37. DOI: 10.22092/IRN.2017.109535

Rambaut, A. & Drummond, A.J. (2009). Tracer version 1.5. Available online at http://beast.bio.ed.ac.uk

Ronquist, F., Teslenko, M., van der Mark, P., Ayres, D.L., Darling, A., Hohna, S.B., Larget, B., Liu, L., Suchard, M.A. & Huelsenbeck, J.P. (2012). MrBayes 3.2: efficient Bayesian phylogenetic inference and model choice across a large model space. Systematic Biology 61, 539-542. DOI: 10.1093/sysbio/sys029

Sepahvand, T. & Zandebasiri, M. (2014). Evaluation of oak decline with local resident, opinions in Zagros forests, Iran. Scholarly Journal of Agricultural Science 4, 231-234.

Steiner, G. (1914). Freilebende Nematoden aus der Schweiz. 2. Teil einer vorläufigen Mitteilung. Archiv für Hydrobiologie und Planktonkunde 9, 420-438.

Tomiczek, C. (1993). Oak decline in Austria and Europe. Journal of Arboriculture 19, 71-73.

Truskova, G.M. & Eroshenko, A.S. (1977). [The nematode fauna of herbaceous and ligneous plants in the pine plantations of the Primor’yal.] Trudy Biologo-Pochvennogo Instituta 47, 35-49.

Zhao, Z.Q., Davies, K.A., Riley, I.T. & Nobbs, J.M. (2006). Laimaphelenchus australis sp. nov. (Nematoda: Aphelenchina) from exotic pines, Pinus radiata and P. pinaster in Australia. Zootaxa 1248, 35-44. DOI: 10.11646/zootaxa.1248.1.4

Zhao, Z.Q., Davies, K.A., Riley, I.T. & Nobbs, J.M. (2007). Laimaphelenchus heidelbergi sp. nov. (Nematoda: Aphelenchina) from Victoria, Australia, and emendment of the diagnosis of the genus. Transactions of the Royal Society of South Australia 131, 182-191. DOI: 10.1080/03721426.2007.10887082

Figures

  • Phylogenetic tree reconstructed using nine 28S rDNA D2-D3 sequences of Laimaphelenchus species/isolates, three Aphelenchoides spp., and two species of Pseudaphelenchus Kanzaki & Giblin-Davis, 2009 in Kanzaki et al., 2009 as the outgroup taxa, using Bayesian inference under the GTR + I + G model. Clade A is indicated.

    View in gallery
  • A: Topotypes of Laimaphelenchus hyrcanus (a possible junior synonym of L. belgradiensis) showing vulva (v) and end of post-vulval uterine sac (PUS); B: L. deconincki recovered from the sampling point of the species by Asghari & Eskandari (2014) in northern Iran (arrowhead showing projection at posterior lip of vulva); C: Male posterior end of L. belgradiensis recovered from the Zagros forests in the present study (arrowheads showing numbered caudal papillae).

    View in gallery
  • Main morphometric data for Laimaphelenchus belgradiensis Oro, 2015 recovered from wood samples of dead oak trees in Zagros forests, Ilam, and two females of the Iranian population of L. deconincki as reported by Asghari & Eskandari (2014). All measurements are in μm and in the form: mean ± s.d. (range).

    View in gallery

Information

Content Metrics

Content Metrics

All Time Past Year Past 30 Days
Abstract Views 9 9 8
Full Text Views 7 7 7
PDF Downloads 2 2 2
EPUB Downloads 0 0 0