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Exposure of seeds to aerosol smoke or crude smoke extracts stimulates the germination of a number of fire-dependent and fire-independent plant species. We now report the identity of a germination-promoting compound present in plant- and cellulose-derived smoke. The structure of this compound, deduced from spectroscopic analysis and confirmed by synthesis, was shown to be that of the butenolide 3-methyl-2 H -furo2,3- c pyran-2-one ( 1 ). Here we show that 1 promotes germination of a number of plant species at a level similar to that observed with plant-derived smoke water.
Flematti et al. (Thu,) studied this question.
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