An age-Induced Variation in Susceptibility to Virus X in Nicotiana Tabacum L.

Abstract

Stage of maturity influences the susceptibility of N. tabacum to virus X. This phenotypic variation is evidenced by a discontinuity of X infection in the inoculated leaves and a lack of systemic invasion of plants inoculated at a late growth stage compared with a complete infection of the inoculated leaves and a rapid systemic invasion of plants inoculated at an early growth stage.