Identification of a putative expansin gene expressed in the subventral glands of the cereal cyst nematode Heterodera avenae

文献类型： 外文期刊

第一作者： Long, Haibo

作者： Long, Haibo;Peng, Deliang;Huang, Wenkun;Liu, Yanke;Peng, Huan

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期刊名称：NEMATOLOGY （ 影响因子：1.442； 五年影响因子：1.485 ）

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收录情况： SCI

摘要： Parasitism genes encoding secretory proteins expressed in the pharyngeal glands of plant-parasitic nematodes play important roles in the parasitic process. A new expansin gene (Ha-expbl) expressed in the subventral glands of the sedentary cyst nematode, Heterodera avenae, was cloned. Southern blot analysis suggested that Ha-expbl is a member of a multigene family. The deduced protein Ha-EXPBl consists of a signal peptide, a CBM II and an expansin domain, and was significantly similar to expansins and expansin-like proteins from the potato cyst nematode, Globodera rostochiensis, and the pine wood nematodes, Bursaphelenchus spp. In situ hybridisation showed that Ha-expbl transcript specifically accumulated in the two subventral gland cells of the second-stage juveniles. Developmental expression confirmed that its transcript abundances were high in the motile juvenile stages and low in the sedentary stage of the nematode, implying a role in the early parasitic-stage process, most likely in aiding migration within the plant.

分类号： R383.1

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