In order to verify the selenium enrichment and selenium tolerance properties of flower konjac,amorphophallus albus and optimum line ZL-19 from their hybrid offspring;and effects of exogenous selenium on nutrients of Amorphophallus Rivieri corms,this paper carried out root irrigation test with different concentrations of sodium selenite(0,5,10,20,40 mg·kg-1)using potting method.The results showed that the highest selenium content in corms of different varieties(lines)were as following:Zl-19 was equivalent to amorphophallus albus(0.192 mg·kg-1),lower than that of flower konjac(0.265 mg·kg-1).In selenium tolerance:ZL-19＞amorphophallus albus＞flower konjac.While,in selenium enrichment capacity:flower konjac＞ZL-19＞amorphophallus albus.When the concentration of exogenous selenium in flower konjac was 10 mg·kg-1,the general performance of various nutritional indexes of the corms were comparatively excellent.And the corm fresh weight was increased by 13.13%.The contents of total sugar,reducing sugar,total protein,soluble protein and GSH-Px activity in corm were 71.265,27.019,50.811,17.605 mg·g-1 and 1.845 U·g-1,respectively.When the concentration of exogenous selenium in amorphophallus albus was 20 mg·kg-1,the general performance of various nutritional indexes of the corms were comparatively excellent.And the corm fresh weight was increased by 12.94%.The contents of total sugar,reducing sugar,total protein,soluble protein and GSH-Px activity in corms were 97.012,29.632,52.773,16.892 mg·g-1 and 1.642 U·g-1,respectively.Also when the concentration of exogenous selenium in ZL-19 was 20 mg·kg-1,the general performances of various nutritional indexes of the corms were comparatively excellent.The corm fresh weight was increased by 28.80%.The contents of total sugar,reducing sugar,total protein and soluble protein and GSH-Px activity in corms reached 84.717,31.819,49.402,17.709 mg·g-1 and 1.719 U·g-1,respectively.
konjacsodium seleniteselenium contentnutritional index
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