Expansins are among plant cell wall modifying agents specifically expressed during development of nematode-induced syncytia
Expansins are among plant cell wall modifying agents specifically expressed during development of nematode-induced syncytia
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DOI：
10.4161/psb.6169
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发表时间：
2008-01-01
影响因子：
2.9
通讯作者：
Golinowski, Wladyslaw
中科院分区：
文献类型：
--
作者：
Fudali, Sylwia;Sobczak, Miroslaw;Golinowski, Wladyslaw
胞囊线虫是一种重要的经济害虫。作为必需的生物营养内生寄生虫，它们入侵寄主根并诱导合胞体的形成，合胞体是它们唯一的营养来源。在合胞体发育过程中，会发生广泛的细胞壁修饰。合胞体分子肥大时细胞壁发生扩张，合胞体细胞壁局部合成导致合胞体细胞壁增厚，形成细胞壁内生。大量研究表明，线虫会改变编码包括Expansins在内的细胞壁修饰蛋白的植物基因的表达。Expansins具有在酸性pH中诱导细胞壁延伸的独特能力。最近，我们发现两个α-Expansin基因LeEXPA4和LeEXPA5在感染马铃薯胞囊线虫(Globodera Rostochiens)的番茄根中表达上调。在本附录中，我们介绍了有关植物细胞壁修饰基因参与合胞体发育的最新结果，并讨论了这一知识在培育抗线虫植物方面的可能实际应用。
Cyst nematodes are economically important pests. As obligatory biotrophic endoparasites they invade host roots and induce formation of syncytia, structures that serve them as the only source of nutrients. During syncytium development, extensive cell wall modifications take place. Cell wall dissolution occurs during cell wall opening formation, cell walls expand during hypertrophy of syncytial elements and local cell wall synthesis leads to the thickening of syncytial cell wall and the formation of cell wall ingrowths. Numerous studies revealed that nematodes change expression of plant genes encoding cell wall modifying proteins including expansins. Expansins poses unique abilities to induce cell wall extension in acidic pH. Recently, we demonstrated that two alpha-expansin genes LeEXPA4 and LeEXPA5 are upregulated in tomato roots infected with potato cyst nematode ( Globodera rostochiensis). In this addendum, we present the most recent results concerning involvement of plant cell wall modifying genes in syncytium development and discuss possible practical applications of this knowledge for developing plants with resistance against nematodes.