用工作波长632.8 nm、功率为2.5 mW的He-Ne激光器辐照铁棍山药,30 min后,其芦头芽萌发受抑,山药茎含水量、可溶性总糖和可溶性蛋白含量分别从70.203 9%下降到66.615 4 4%、从72.213 25 mg·g~(-1)下降到25.878 88 mg·g~(-1)、从508.539 4 μg·g~(-1)下降到258.423 1 μg·g~(-1),丙二醛(MDA)和超氧阴离子含量分别从0.62 mmol·g~(-1)变为8.033 122 mmol·g~(-1)、从32.997 13 μg·g~(-1)变为35.536 42 μg·g~(-1),贮藏前期的超氧化物歧化酶(SOD)活性从494.864 U·g~(-1)变为1 105.85 U·g~(-1),贮藏后期的SOD活性从1 105.85 U·g~(-1)变为959.167 U·g~(-1).%The Lo bud germination inhibition of Tiegun dioscorea opposita thunb occurred, the yam stem water content, total soluble sugar and soluble protein content respectively declined from 70.203 9% to 66.615 44%, from 72.213 25 mg·g~(-1) to 25.878 88 mg·g~(-1) and from 508.539 4 μg·g~(-1) to 258.423 1 μg·g~(-1), and MDA and O2 contents respectively increased from 0.62 mmol·g~(-1) to 8.033 122 mmol·g~(-1) and from 32.997 13 μg·g~(-1) to 35.536 42 μg·g~(-1) after it was irradiated by 2.5 mW He-Ne laser for 30 min. After the laser irradiation, the superoxide dismutase (SOD) activity of Tiegun dioscorea opposita thunb increased from 494.864 U·g~(-1) to 1 105.85 U·g~(-1) in the initial period of its storage and then declined from 1105.85 U·g~(-1) to 959.167 U·g~(-1).
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