Table 2.

Modelling of oxygen pool size in various oilseed rape (Brassica napus) seed compartments, based on micro CT data

	Seed coat	Epidermis	Outer cotyledon	Inner cotyledon	Endosperm	Hypocotyl	Whole seed
Volume fraction	0.22	0.11	0.36	0.20	0.02	0.09	1
Porosity	0.1420	0.0072	0.0104	0.0104	0.0000	0.0160	0.04
Volume (mm3)	1.54	0.78	2.57	1.42	0.16	0.67	7.13
Water content (v/v)*	0.81	0.60	0.55	0.60	0.95	0.52	0.63
O2 equiv concentration from simulation (mol m−3)	8.53	7.95	5.31	2.92	3.26	5.93
O2 pool stored in voids (nmol)	1.860	0.044	0.142	0.043	0.000	0.063	2.153
O2 pool dissolved in water (nmol)	0.282	0.115	0.229	0.077	0.015	0.064	0.781
Total O2 pool in the seed (nmol)	2.142	0.159	0.371	0.120	0.015	0.127	2.934
O2 fraction in tissue	0.73	0.05	0.13	0.04	0.01	0.04	1.00
O2 fraction in air	0.87	0.28	0.38	0.36	0.00	0.50	0.73
O2 fraction dissolved	0.13	0.72	0.62	0.64	1.00	0.50	0.27

^*Data are derived from weighing dissected tissue samples before and after drying at 60°C for 48 h.