Minerals
In embryo, contents of K, Ca, Na, Fe, Mn, Cu and Zn decreased as
development progressed, while those of
Mg and P gradually increased (Figures
5, S9). In endosperm, contents of the nine mineral nutrients decreased
as grain filling progressed, being higher at early stage than the later
stage. This could be attributed to the dilution effect of grain dry
matter, which had a higher rate of accumulation than the minerals (Wang
et al., 2018). Compared with endosperm, contents of all minerals were
high in the embryo.