Plant parasitic nematodes,as obligate living parasites,affect plant growth and development by infecting roots and cause huge losses in agricultural production in China. Calreticulin are multifunctional proteins which are located in the endoplasmic reticulum(ER) in eukaryotic cells. Calreticulin contains three structural functional domains:N-functional domain,P-functional domain,and C-functional domain. The calreticulin have been found in Meloidogyne incognita,Heterodera avenae,Aphelenchoides besseyi,Radopholus similis, Ditylenchus angustus,and Bursaphelenchus xylophilus. We summarized the stru...