Relation of leaf epidermal characteristics with susceptibility and resistance of potato (Solanum tuberosum) to late blight disease (Phytophthora infestans)

摘要: An experiment was conducted during 2000-2001 to study leaf epidermal characteristics of 4 varieties potato (Solanum tuberosum L.) (2 resistant : 'Kufri Jyoti' and Badshah' 2 susceptible Ashoka' Chandramukhi') differing in their resistance or susceptibility late blight disease [Phytophthora infestans (Mont) de Bary]. The cuticle significantly thicker the on both adaxial (5.8 6.9 μm) abaxial (5.2 5.4 surfaces than that varieties. cuticle-cum-epidermis thickness also showed a similar trend. size (23.2 23.8 μm, surface), frequency (83.2 62.8/mm , surface) index stomata (17.0 18.5 38.0 38.9 surfaces) were higher had values for trichomes (588.0 735.6 mm 667.8 600.0 surface). Resistant oftrichomes (640.7 676.9/cm