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Endogenous Levels of Gibberellins, IAA and Cytokinins in Catharanthus Crown Gall Tissues of Different Tumor Types |
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| Authors: | Saimoto Hiroshi; Nakagawa Sachiko; Kobayashi Masatomo; Fujioka Shozo; Barreto Maria Claudia Cifuentes; Sakurai Akira; Syono Kunihiko |
| Institution: | 1The Institute of Physical and Chemical Research (RIKEN) Wako-shi, Saitama, 351-01 Japan 2Research Laboratory, Somar Corporation Soka-shi, Saitama, 340 Japan 3Department of Pure and Applied Sciences, The University of Tokyo Meguro-ku, Tokyo, 153 Japan |
| Abstract: | Endogenous levels of gibberellins, auxins and cytokinins incrown gall tissues of Catharanthus roseus G. Don. (Vinca roseaL.) of two different tumor types, induced by a nopaline-typeand an octopine-type Ti-plasmid, were examined. The levels of gibberellins were higher in nopaline-type V208cells than in octopine-type V277 cells. GA12 and GA24 were identifiedfrom V208 cells. The level of IAA was 20-fold higher in V208cells than in V277 cells. The level of trans-ribosylzeatin washigher in V277 cells than in V208 cells, whereas trans-zeatinwas present at higher levels in V208 cells than in V277 cells. Our results revealed that the production of gibberellins, aswell as of IAA and cytokinins, in the crown gall tissues ofCatharanthus roseus differed between the octopine- and nopaline-typetumors, even though the crown galls apparently grow as unorganizedaggregates of cells in both cases. 4Present address: Facultad de Ciencias, Pontificia UniversidadJaveriana, Bogota, Colombia. (Received September 29, 1989; Accepted February 2, 1990) |
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