KARRIKIN INSENSITIVE2 regulates leaf development, root system architecture and arbuscular‐mycorrhizal symbiosis in Brachypodium distachyon
Résumé
Karrikins, of which KAR1 and KAR2 are representatives, are a class of abiotic plant growth regulators produced from the partial combustion of plant material (Flematti et al., 2004; Flematti et al., 2009). Released into the soil following wildfires, karrikins can promote seed germination and seedling photomorphogenesis, and thereby facilitate the revegetation process (Nelson et al., 2009; Nelson et al., 2010; Stevens et al., 2007). The butenolide moiety of karrikins is also an essential structural feature of strigolactones (SLs), which are carotenoid-derived plant hormones that regulate a range of developmental processes in plants, and also serve as a rhizosphere signal for arbuscular mycorrhizal fungi and root parasitic weeds (Waters et al., 2016; Bürger and Chory, 2020). Collectively, these butenolides possess wide-ranging biological activities with considerable agricultural and environmental significance.
