3-Methyl-2H-furo[2,3-c]pyran-2-one

Karrikinolide is a plant growth regulator that has been found in plant-derived smoke. It increases the germination rate and seedling mass in a panel of eight arable weed species when applied to filter paper at a concentration of 1 μM. Topical application of karrikinolide (0.1 nM) increases the number of leaves, leaf length, and fresh and dry leaf weights in commercial onion (A. cepa) plants.

Orange Solid

Forest fires are actually beneficial for ecosystems, provided they don’t happen too often. After a fire, plants germinate and grow incredibly fast. KAR1 is a compound in smoke responsible for promoting the seed germination of a wide range of plant species

[1] M. DAWS. Butenolide from plant-derived smoke enhances germination and seedling growth of arable weed species[J]. Plant Growth Regulation, 2006, 6 1: 73-82. DOI: 10.1007/s10725-006-9149-8
[2] M.G. KULKARNI . Effect of smoke-water and a smoke-isolated butenolide on the growth and genotoxicity of commercial onion[J]. Scientia Horticulturae, 2010, 124 4: Pages 434-439. DOI: 10.1016/j.scienta.2010.02.005