#SWEET J STRAIN CRACK#

quinoa - chlorotic lesions on inoculated leaves, but no systemic infection. This plant is used as an indexing host when infected by grafting.Ĭhenopodium amaranticolor and C. Ipomoea setosa - systemic infection causing chlorotic vein-clearing, vein-banding and chlorotic spots of leaves. Some severe strains induce stunting, necrosis and the death of the plant.

Ipomoea nil - systemic infection causing vein-clearing, vein banding, epinasty and crinkling of leaves. SPFMV is mechanically transmissible to, and induces conspicuous symptoms in, the following useful indicator plants:

Original citation: Valverde and Moreira (2004) SPFMV is serologically distantly related to Sweet potato latent virus ( Hammond et al., 1992) and several other potyviruses ( Jain et al., 1993). Virus strains have also been shown to differ genomically ( Mori et al., 1995 Colinet et al., 1998) the EA strain is known to occur only in East Africa and is genetically distant to other strains, but the RC strain occurs in Australia, Africa, North America and Asia, the O strain in Africa, Asia and South America and the S strain in Australia, Africa, Asia and North and South America ( Tairo et al., 2005).

#SWEET J STRAIN CRACK#

Several isolates and strains of SPFMV have been characterized in different parts of the world, perhaps the most important ones being the ordinary (O) ( Usugi et al., 1991), russet crack (RC) ( Moyer and Salazar, 1989), severe (S) ( Mori et al., 1995) and East African (EA) strains because they directly affect root and tuber quality. Like many other potyviruses, SPFMV has a narrow host range, is transmissible in the non-persistent manner by aphids, induces in infected plants cytoplasmic intracellular inclusions, has flexuous filamentous particles, measuring ca 12 x 810-865 nm, that contain positive-sense single stranded RNA of ca 10 kb and a single coat protein of ca 36 kDa. Sweet potato feathery mottle virus (SPFMV) is a typical species of the Potyvirus genus ( Campbell et al., 1974 Moyer and Cali, 1985 Pozzer et al., 1995), one of six genera included in the family Potyviridae ( Berger et al., 2005).

Sweet j strain