relative content of Pb and its correlation were investigated in endosperm,
aleurone layer and pericarp respectively among different wheat varieties for specific
end-uses (WVFSE) using scanning electron microscope (SEM)
equipped with the energy dispersive X-ray spectroscope (EDS). The results
showed that Pb contents in grains at different positions followed the order of
endosperm > pericarp > aleurone. The differences of Pb contents varied
among the WVFSE, and wheat with strong gluten had a highest average content
of Pb, while wheat with medium gluten had a lowest one. There were significant third
order equation correlations between Pb content in endosperm and that in
aleurone layer and that in pericarp, respectively. And good
correlation coefficients were obtained. However, the correlation differed at
different position among WVFSE, which indicated that Pb contents in endosperm,
aleurone layer and pericarp were regulated by each other.
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