Resistance to potato late blight (Phytophtora infestans (Mont.) de Bary) in Solanum nigrum, S. Villosum and their sexual hybrids with S. tuberosum and S. demissum.

摘要: Solanum nigrum and S. villosum, their sexual hybrids with tuberosum demissum respectively, were inoculated a complex race of Phytophthora infestans. No visible reaction was seen on villosum one genotype nigrum. Another the showed hypersensitive response most leaves. In experiment, some sporulation observed detached leaves hybrid derived from Microscopical examination infections in nigrum, that penetration epidermal cells subsequent intercellular growth pathogen into spongy mesophyll occurred, but without formation haustoria, invaded neighbouring became necrotic. Callose appositions found epidermis all genotypes, also unrelated nonhost species Brassica campestris.