A selective pretreatment method for determination of endogenous active brassinosteroids in plant tissues: double layered solid phase extraction combined with boronate affinity polymer monolith microextraction

Table 3 Amount of endogenous BRs in different plant tissues

Analytes	*O. sativa YTA shoot*	*O. sativa YTB shoot*	*B. napus L.* shoot	*B. napus L.* flower bud	*B. napus L.* flower
BL	n.d.	n.d.	n.d.	15.84 ± 0.78	89.80 ± 7.41
CS	1.86 ± 0.11	1.33 ± 0.22	0.30 ± 0.05	13.54 ± 0.20	11.42 ± 1.54
28-norBL	n.d.	n.d.	n.d.	n.d.	6.14 ± 0.18
28-norCS	n.d.	n.d.	n.d.	5.13 ± 0.15	12.36 ± 0.56

ISSN: 1746-4811