Unfolding the Mysteries of Strigolactone Signaling
摘要
Phytohormones integrate plant growth and developmental programs with extrinsic biotic and abiotic stimuli,thereby ensuring plant architecture is optimized for the local environment.Strigolactones (SLs),newly identified carotenoid-derived plant hormones,play non-redundant and multifaceted roles throughout the plant life cycle (de Saint Germain et al.,2013),similarly to other plant hormones.Although SLs were originally identified as germination stimulants of the seeds of parasitic plants (e.g.Striga spp.),they were later shown to play a role in symbiotic plant-arbuscular mycorrhizal (AM) fungi interactions.SLs were officially classified as plant hormones in 2008 for their functions in inhibiting shoot branching.Since then,their versatility in modulating seed germination,seedling photomorphogenesis,shoot morphology,and root development has been widely explored.