The Role of the Epidermis in Virus-induced Local Lesions on Cowpea and Tobacco Leaves

摘要: Summary Removal of the lower epidermis from cowpea and tobacco leaves inoculated with mosaic virus (TMV) or necrosis (TNV) resulted in reduction local lesion numbers. The was time-dependent greatly influenced by darkening plants 24 h before inoculation. In both darkened non-darkened period contact between mesophyll required for formation to occur differed markedly. For TMV these periods were 1.5 8 respectively, combination cowpea-TNV they 1 6 respectively. Xanthi nc 8.5 tobacco-TNV system More plasmodesmata observed superficial cells dark-treated than those non-dark-treated plants. significance this observation relation passage infectious units into is discussed.