Dear Editor Strigolactones （SLs） are novel phytohormones that shape plant architecture by inhibiting shoot branching and regulating root growth, besides their established functions in stimulating seed germination of...Dear Editor Strigolactones （SLs） are novel phytohormones that shape plant architecture by inhibiting shoot branching and regulating root growth, besides their established functions in stimulating seed germination of root-parasitic weeds, such as Striga and Phelipanche species, and inducing hyphal branching in arbuscular mycorrhizal （AM） fungi （AI-Babili and Bouwmeester, 2015）. Canonical SLs are divided into strigoland orobanchollike subfamilies with a typical structure consisting of a tricyclic （ABC-ring） and a monocyclic lactone （D-ring）, which are connected by an enol ether bridge （Figure 1A and Supplemental Figure 1）. SLs are synthesized from carotenoids via carlactone, which lacks the B/C-ring （Alder et al., 2012）. In Arabidopsis, carlactone （Figure 1A） is converted by MAX1, a member of the CYP711 family, into carlactonoic acid, after methylation, which, can bind to SL receptor （Abe et al., 2014）. In rice, a MAX1 homolog, the carlactone oxidase, introduces B/C-rings into carlactone,展开更多
文摘Dear Editor Strigolactones （SLs） are novel phytohormones that shape plant architecture by inhibiting shoot branching and regulating root growth, besides their established functions in stimulating seed germination of root-parasitic weeds, such as Striga and Phelipanche species, and inducing hyphal branching in arbuscular mycorrhizal （AM） fungi （AI-Babili and Bouwmeester, 2015）. Canonical SLs are divided into strigoland orobanchollike subfamilies with a typical structure consisting of a tricyclic （ABC-ring） and a monocyclic lactone （D-ring）, which are connected by an enol ether bridge （Figure 1A and Supplemental Figure 1）. SLs are synthesized from carotenoids via carlactone, which lacks the B/C-ring （Alder et al., 2012）. In Arabidopsis, carlactone （Figure 1A） is converted by MAX1, a member of the CYP711 family, into carlactonoic acid, after methylation, which, can bind to SL receptor （Abe et al., 2014）. In rice, a MAX1 homolog, the carlactone oxidase, introduces B/C-rings into carlactone,
