VIEW ARTICLE

³⁵Sulfur Diffusion from Bean Leaves in Relation to Growth of Pseudomonas phaseolicola. R. D. Mobley, Former Research Assistant, Department of Plant Pathology, University of California, Berkeley 94720; M. N. Schroth(2), and D. C. Hildebrand(3). (2)(3)Professor, and Associate Research Plant Pathologist, respectively, Department of Plant Pathology, University of California, Berkeley 94720. Phytopathology 62:300-301. DOI: 10.1094/Phyto-62-300.

Growth phases of Pseudomonas phaseolicola, when infiltrated into susceptible bean leaves, consisted of an initial 10- to 12-hr lag phase followed by logarithmic growth with generation times of 2 to 2.5 hr. Greater diffusion of ³⁵Sulfur from infected leaves was first detected between 18 and 24 hr. The rate of the increased diffusion from diseased leaves, expressed as the differences in diffusion from healthy and diseased tissues, became logarithmic after 24 hr following an initial flush of ³⁵Sulfur between 18 and 24 hr.