ABSTRACT
The cellular, morphological, and biochemical characters used for the characterization and determination of the genus of the plant pathogenic bacterial isolates as given by Garden and Luseitte. The bacterial cells are single straight rods, 0.25–0.35 × 0.9–3.5 µm in size, with long filamentous strands under some cultural conditions. Colonies are of two types: Convex to pulvinate, smooth, opalescent with entire margins and umbonate, rough with finely undulated margins. Cells stain Gram-negative. Nonmotile. Oxidase negative and catalase positive. The bacterium has been isolated from Vitis vinifera, on which it causes bacterial necrosis and canker, mainly of the woody parts, in the Mediterranean region and South Africa. The bacterial cells are straight rods, 0.5–1.0 × 1–3 µm in size, occur singly, in pairs, and sometimes in short chains. Gram-negative. Motile by peritrichous flagella. They are aerobic, possessing a respiratory type of metabolism with oxygen as the terminal electron acceptor.
