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Identification of putative expansin-like genes from the pine wood nematode, Bursaphelenchus xylophilus, and evolution of the expansin gene family within the Nematoda

In: Nematology
Authors:
Taisei Kikuchi Forestry and Forest Products Research Institute, Tsukuba, Ibaraki 305-8687, Japan

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Hongmei Li Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China, ILVO, Burg. Van Gansberghelaan 96, 9820 Merelbeke, Belgium

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Nurul Karim Forestry and Forest Products Research Institute, Tsukuba, Ibaraki 305-8687, Japan

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Malcolm W. Kennedy Faculty of Biomedical & Life Sciences, Environmental & Evolutionary Biology, University of Glasgow, Glasgow G12 8QQ, UK

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Maurice Moens ILVO, Burg. Van Gansberghelaan 96, 9820 Merelbeke, Belgium, Laboratory for Agrozoology, Ghent University, Coupure Links 653, 9000 Gent, Belgium

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John T. Jones PPP Programme, SCRI, Invergowrie, Dundee DD2 5DA, UK, Biology Department, Ghent University, K.L. Ledeganckstraat 35, 9000 Ghent, Belgium;, Email: jjones@scri.ac.uk

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Online Publication Date:
01 Jan 2009
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Abstract

We report the cloning and characterisation of genes encoding expansin-like proteins from the pine wood nematodes, Bursaphelenchus xylophilus and B. mucronatus. A small family of genes is present in both species and the Bursaphelenchus genes are most similar to expansins and expansin-like proteins from the potato cyst nematode Globodera rostochiensis and root-knot nematodes. Molecular modelling suggests that the genes could encode a protein with a structure similar to that of functionally characterised expansins. Expression analysis showed that the Bursaphelenchus expansin-like genes are expressed solely in the pharyngeal gland cells, implying a role in the host-parasite interaction, most likely in assisting migration through the plant. Some G. rostochiensis and root-knot nematode expansins are composed of a carbohydrate-binding domain coupled to an expansin domain but no carbohydrate binding domain is present on any of the Bursaphelenchus sequences. We suggest a model for evolution of the expansin gene family within the plant-parasitic nematodes of the Tylenchida and Aphelenchida.

Title:
Identification of putative expansin-like genes from the pine wood nematode, Bursaphelenchus xylophilus, and evolution of the expansin gene family within the Nematoda
Article Type:
Research Article
DOI:
https://doi.org/10.1163/156854109X446953
Language:
English
Pages:
355–364
Keywords:
HORIZONTAL GENE TRANSFER; HOST-PARASITE INTERACTIONS; EVOLUTION; MOLECULAR BIOLOGY
In:
Nematology
In:
Volume 11: Issue 3
Publisher:
Brill
E-ISSN:
1568-5411
Print ISSN:
1388-5545
Subjects:
Nematology, Biology

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