Dear Editor,Strigolactones （SLs） are a class of carotenoid-derived plant hor-mones that regulate shoot branching among other developmental processes （Gomez-Roldan et al., 2008; Umehara et al., 2008; AI-Babili and B...Dear Editor,Strigolactones （SLs） are a class of carotenoid-derived plant hor-mones that regulate shoot branching among other developmental processes （Gomez-Roldan et al., 2008; Umehara et al., 2008; AI-Babili and Bouwmeester, 2015）. In addition, SLs are released by roots as a chemical signal attracting symbiotic arbuscular mycorrhizal fungi. However, this signal is also perceived by seeds of root parasitic weeds, announcing the presence of a host and triggering germination （AI-Babili and Bouwmeester, 2015）. Natural SLs consist of a butenolide ring （D ring） connected by an enol ether bridge to a tricyclic lactone （ABC rings） in canonical SLs, such as strigol, and to a variable, second moiety in non-canonical SLs, such as methyl carlactonoate.展开更多
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 a class of carotenoid-derived plant hor-mones that regulate shoot branching among other developmental processes （Gomez-Roldan et al., 2008; Umehara et al., 2008; AI-Babili and Bouwmeester, 2015）. In addition, SLs are released by roots as a chemical signal attracting symbiotic arbuscular mycorrhizal fungi. However, this signal is also perceived by seeds of root parasitic weeds, announcing the presence of a host and triggering germination （AI-Babili and Bouwmeester, 2015）. Natural SLs consist of a butenolide ring （D ring） connected by an enol ether bridge to a tricyclic lactone （ABC rings） in canonical SLs, such as strigol, and to a variable, second moiety in non-canonical SLs, such as methyl carlactonoate.
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,
