Selenium treatment and selenium-enriched media will affect seed germination in a number of species. Soybeans (Glycine max Merr.) pretreated with 10 to 100 g Se ha-1 as either seed or foliar treatments were grown on a nonseleniferous sandy loam soil and subsequently produced seeds accumulating 0.78 to 38.5 mg Se kg-1. When these seeds were planted without application of selenium fertilizer, the concentration of harvested seeds decreased to 0.11 to 1.02 mg Se kg-1 (126). Seed germination was reduced if wheat (Triticum aestivum L.) was grown in soils with >16.0mg Se kg-1 (127). Weight of fresh Alfalfa seedling was suppressed in response to >10.0 mg Se L-1 in solution culture (128). Turnip (Brassica campestris L.) seed germination was >98% when seeds were incubated in <484 mg NaSeO3 L-1, but decreased to 51% if the concentration of NaSeO4 was increased to 4.84 g NaSeO3 L-1. In response to NaSeO3, turnip seed germination was 97% at Se levels <95 mg NaSeO3 L-1, 53% at 484 mg NaSeO3 L-1, 17% at 951 mg NaSeO3 L-1, and 0% at 4.84 g NaSeO3 L-1 (129). Interestingly, several studies report that seed germination was enhanced in response to <1.0 mg Se L-1 in nutrient solutions (127,130,131). Activity of �-galactosidase, an enzyme important in the hydrolysis of complex carbohydrates during seed germination, in fenugreek (Trigonella foenum-graecum L.) was enhanced by 40% when exposed to 0.5mg L-1 Na2SeO3-seed treatment, but decreased by 60 to 65% if Na2SeO3-seed treatment was increased to 1 mg L-1 (132). Seed germination was >96% after 72 h in a rapid-cycling Brassica oleracea population when the content of selenium in the seed was <700 µg Se g-1 dry weight (124).
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