VIEW ARTICLE

Physiology and Biochemistry

Capsidiol Production in Pepper Leaves in Incompatible Interactions With Fungi. E. W. B. Ward, Research Institute, Research Branch, Agriculture Canada, University Sub Post Office, London, Ontario N6A 5B7 Canada; Phytopathology 66:175-176. DOI: 10.1094/Phyto-66-175.

In incompatible interactions with Phytophthora capsici and P. infestans the concentrations of the phytoalexin, capsidiol, in hypersensitively responding pepper leaf epidermal cells was estimated on the basis of concentrations diffusing into overlying infection droplets. Very high values were obtained (approaching molar levels) exceeding the concentration required for total inhibition of fungi in vitro by several orders of magnitude.