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Cells from a green normal (dependent on exogenous hormones) callus and from an achlorophyllous fully habituated (independent from exogenous hormones) callus, both generated from the same sugarbeet strain more than twenty years ago, were reexamined cytologically, ten years after the first comparative description. Cells from the habituated callus, already considered as neoplastic cells, because terminating...
Heterotrimeric G proteins are an important component of signal transduction pathway in animals. Although these proteins have been described in plants, their exact function and action mode are not clearly defined. In order to analyze the relationship between these proteins and the transduction of light signals in spinach, we have isolated by 5' and 3' RACE-PCR a 1660bp cDNA clone called SOGA1. This...
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