Williamson Valerie M, Kumar Amar
Department of Nematology, University of California, Davis, One Shield Avenue, Davis, CA 95616, USA.
Trends Genet. 2006 Jul;22(7):396-403. doi: 10.1016/j.tig.2006.05.003. Epub 2006 May 24.
Parasitic nematodes infect thousands of plant species, but some plants harbor specific resistance genes that defend against these pests. Several nematode resistance genes have been cloned in plants, and most resemble other plant resistance genes. Nematode resistance is generally characterized by host plant cell death near or at the feeding site of the endoparasitic worm. The timing and localization of the resistance response varies with the particular resistance gene and nematode interaction. Although there is genetic evidence that single genes in the nematode can determine whether a plant mounts a resistance response, cognate nematode effectors corresponding to a plant resistance gene have not been identified. However, recent progress in genetics and genomics of both plants and nematodes, and developments in RNA silencing strategies are improving our understanding of the molecular players in this complex interaction. In this article, we review the nature and mechanisms of plant-nematode interactions with respect to resistance in plants.
寄生线虫感染数千种植物，但一些植物拥有抵御这些害虫的特定抗性基因。几种线虫抗性基因已在植物中克隆出来，且大多数与其他植物抗性基因相似。线虫抗性通常以内寄生性线虫取食部位附近或取食部位的寄主植物细胞死亡为特征。抗性反应的时间和定位因特定的抗性基因与线虫的相互作用而异。虽然有遗传学证据表明线虫中的单个基因可决定植物是否产生抗性反应，但与植物抗性基因相对应的同源线虫效应子尚未被鉴定出来。然而，植物和线虫遗传学与基因组学的最新进展以及RNA沉默策略的发展，正在增进我们对这种复杂相互作用中分子参与者的理解。在本文中，我们就植物抗性方面综述了植物 - 线虫相互作用的本质和机制。
