the low amount of stimulants produced by plants, together with
their rapid degradability make it crucial to develop fast analytical
methods with very low limits of quantification. In the last years
several quantification methods have been used. First, the use of the
parasitic seed germination bioassay was an indirect method for the
O
O
O
Carlactone
COOCH 3
O
O
O
Carlactonic acid
COOCH 3
O
O
O
O
O
Zealactone
COOCH 3
O
O
O
O
O
Zeapyranolactone
O
HO
H
O
O
O
O
O
Avenaol
COOCH 3
O
O
O
Heliolactone
O
O
OH
O
O
COOCH 3
O
O
O
Lotuslactone
O
O
O
3-hydroxycarlactone
HO
O
O
O
OH
O
O
Medicaol
O
O
O
O
O
7 -hydroxy-5-deoxystrigol
HO
O
O
O
O
O
7-oxoorobanchyl acetate
O
OAc
O
O
O
O
O
7 -hydroxyorobanchyl acetate
OAc
HO
O
O
O
O
O
7 -hydroxyorobanchyl acetate
OAc
HO
Fig. 1 (continued)
Quantification of Strigolactones
201