Abstract
An antisense gene construct of a peroxidase gene (Shpx6a) from a tropical pasture legume Stylosanthes humilis was transferred into tobacco cells via Agrobacterium tumefaciensto test whether peroxidase activity could be decreased and what effect this would have on lignification. A large number of tobacco cell lines were regenerated on selective media and stable integration of the transgene was confirmed in randomly selected putative transformants. Analyses of the primary transgenic plants and their progeny (T1) demonstrated that the total peroxidase activity was significantly decreased (up to 36%) as compared to that measured in untransformed control plants. Importantly, reduction in peroxidase activity is accompanied by decreases (up to 23%) in lignin content in several transgenic lines.
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