Table II.

Endogenous levels of BRs in 49-d-old shoots of WT, lka, and lkb of pea

BRBR Level
WTlkalkb
ng kg−1 fresh wt
BrassinolideND1-a NDND
Castasterone491  ± 0.33005  ± 2.5112  ± 0.2
Typhasterol26  ± 0.139  ± 1.54  ± 0.0
3-Dehydroteasterone20  ± 1.421  ± 1.915  ± 0.4
Teasterone5  ± 0.15  ± 0.54  ± 0.2
6-Deoxocastasterone2937  ± 224053  ± 73208  ± 7.8
6-Deoxotyphasterol835  ± 2.1983  ± 17245  ± 13
3-Dehydro-6-deoxoteasterone182  ± 1.9339  ± 4.2101  ± 4.1
6-Deoxoteasterone180  ± 2.8197  ± 1.1176  ± 2.9

The levels of BRs were determined by GC-SIM using 2H internal standards. Data are means ± se of duplicate determinations.

    • F1-a ND, Not detected.