Table 1. Distribution of strigolactones in the plant kingdom.
| Canonical strigolactones | Non-canonical strigolactones | |||
|---|---|---|---|---|
| Orobanchol-type SL | Strigol-type SL | |||
| Pteridophyte | Selaginella moellendorffii | 4-deoxyorobanchol | CLA | |
| Gymnosperm | Pinus thunbergii | orobanchol, orobanchyl acetate | CLA | |
| Ginkgo biloba | 4-deoxyorobanchol, orobanchol, orobanchyl acetate | |||
| Angiosperm | Oryza sativa | 4-deoxyorobanchol, orobanchol, orobanchyl acetate, 7-oxoorobanchyl acetate | ||
| Pisum sativum | 4-deoxyorobanchol, orobanchol, orobanchyl acetate, fabacol, fabacyl acetate | |||
| Solanum lycopersicum | 4-deoxyorobanchol, orobanchol, solanacol, 7-hydroxyorobanchol | |||
| Cucumis sativus | 4-deoxyorobanchol, orobanchol, orobanchyl acetate, 7-oxoorobanchol, 7-oxoorobanchyl acetate, 7-hydroxyorobanchol, 7-hydroxyorobanchyl acetate | |||
| Nicotiana tabacum | 4-deoxyorobanchol, orobanchol, orobanchyl acetate, solanacol, solanacyl acetate | 5-deoxystrigol, 4-hydroxy-5-deoxystrigol, 4-acetoxy-5-deoxystrigol | ||
| Astragalus sinicus | orobanchyl acetate | 5-deoxystrigol, sorgomol | ||
| Gossypium hirsutum | strigol, strigyl acetate | |||
| Sorghum bicolor | 5-deoxystrigol, strigol, strigyl acetate, sorgomol | |||
| Fragaria×ananassa | 5-deoxystrigol, strigol, strigyl acetate | |||
| Lotus japonicus | 5-deoxystrigol | methyl lotuslactonoate* | ||
| Helianthus annuus | heliolactone, CLA | |||
| Zea mays | 5-deoxystrigol | methyl zealactonoate** CLA | ||
| Populus | 4-deoxyorobanchol | CLA, MeCLA | ||
Strigolactones identified in root exudates are listed. CLA, carlactononic acid; MeCLA, methyl carlactonoate. *, ** Structures of these novel strigolactones will be reported elsewhere.