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- W2109034654 abstract "When plants are infected with avirulent pathogens, a selected group of plant cells rapidly die in a process commonly called the hypersensitive response (HR). Some mutations and overexpression of some unrelated genes mimic the HR lesion and associated defense responses. In all of these situations, a genetically programmed cell death pathway is activated wherein the cell actively participates in killing itself. Here we report a developmentally and environmentally regulated HR-like cell death in potato leaves constitutively expressing bacterial pyruvate decarboxylase (PDC). Lesions first appeared on the tip of fully expanded source leaves. Lesion formation was accompanied by activation of multiple defense responses and resulted in a significant resistance to Phytophthora infestans . The transgenic plants showed a five- to 12-fold increase in leaf tissue acetaldehyde and exported two- to 10-fold higher amounts of sucrose compared to the wild-type. When plants were grown at a higher temperature, both the lesion phenotype and sucrose export were restored to wild-type situations. The reduced levels of acetaldehyde at the elevated temperature suggested that the interplay of acetaldehyde with environmental and physiological factors is the inducer of lesion development. We propose that sugar metabolism plays a crucial role in the execution of cell death programs in plants." @default.
- W2109034654 created "2016-06-24" @default.
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- W2109034654 date "1998-12-01" @default.
- W2109034654 modified "2023-10-14" @default.
- W2109034654 title "Activation of plant defense responses and sugar efflux by expression of pyruvate decarboxylase in potato leaves" @default.
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- W2109034654 doi "https://doi.org/10.1046/j.1365-313x.1998.00329.x" @default.
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