Control of osmotin gene expression by ABA and osmotic stress in vegetative tissues of wild‐type and ABA‐deficient mutants of tomato

• DOI: 10.1111/j.1399-3054.1995.tb06849.x
• Publication Date: 2006-05-01T06:43:14Z
• Authors: Stefania Grillo; Antonella Leone; Yi Xu; Marina Tucci; Raffaella Francione; Paul M. Hasegawa; Luigi Monti; Ray A. Bressan
• Keywords: Lycopersicon; Osmotic shock; Wild type

Osmotin gene expression and protein synthesis were up‐regulated in young tomato ( Lycopersicon esculentum cv. Rheinlands Ruhm) plants after a short exposure (24 h) to 150 m M NaCl or 100 μ abscisic acid (ABA) dehydration 80% of original plant fresh weight. Osmotically induced accumulation osmotin mRNA was accompanied by large increase endogenous ABA levels. Increasing also observed during longer (7 days) salt. Upon treatment with NaCl. levels increased both root leaf tissues. an additional transcript roots. No induction upon salt water stress the ABA‐deficient mutant sitiens . Treatment exogenous level normally found salt‐treated wild‐type plants. However, alone enhanced another flacca ) which is impaired synthesis. In tobacco carrying promoter/β‐glucuronidase (GUS) fusion gene, GUS could be only partially blocked inhibitor fluoridone. simultaneous resulted higher compared those following alone. short‐ long‐term osmotic treatments mutants. Our results support previous evidence that may triggered part through separate pathway activation.