Abnormal accumulation of sugars and phenolics in tobacco roots expressing the Agrobacterium T-6b oncogene and the role of these compounds in 6b-induced growth.

摘要: The Agrobacterium T-DNA oncogene 6b induces tumors and modifies the growth of transgenic plants by an unknown mechanism. We have investigated changes in roots tobacco seedlings that express a dexamethasone-inducible T-6b (dex-T-6b) gene. On induction medium with sucrose, intact or isolated dex-T-6b accumulated glucose, fructose changed their growth, contrary to noninduced roots. Root fragments bridging agar blocks without sucrose sugars at site uptake, resulting local growth. Induced root showed enhanced uptake 14C-labeled fructose. When were placed on sucrose-free medium, sugar levels strongly decreased increased cotyledons. Collectively, these results demonstrate stimulates retention drastic effects Apart from sugars, phenolic compounds also been found accumulate tissues proposed earlier play role ...