Germination (%)
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 0
20 40 60 80 100
Figure 17 Removal of testa and endocarp readily remove seed dormancy of P.
campanulata. Germination percentage of P. campanulata seeds with
both the endocarp and seed coat removed (open circles), with the endocarp removed (seed coat retained) (closed circles), with the endocarp removed and treated with 100 ppm GA3 (closed triangles), and intact seed (closed squares) was plotted against time of incubation (Chien et al., 2006).
Figure 18 The relation between water uptake and seed physiology. (Vertucci, 1993)
: germination inhibitors or dormancy inducer --OH
Figure 19 The hypothesis of desulfation regulation in seed dormancy and
germination. It speculated that seed testa and endocarp contain several metabolites to regulate dormancy and inhibit germination.
Sulfatase
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APPENDIX
MATERIALS AND METHODS