He-Ne激光辐照铁棍山药贮藏保鲜的研究

Storage of Tiegun dioscorea opposita thunb by He-Ne laser irradiation

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 4μg.g-1下降到258.423 1μg.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 13μg.g-1变为35.536 42μg.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^- 1and from 508. 539 4 μg · g^-1 to 258.423 1 μg · g^-1, and MDA and Ozcontents respectively increased from 0.62 mmol ~ g-lto 8. 033 122 mmol ·g^-land from 32. 997 13 btg · g^-1to 35. 536 42 big ·g^-1after 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.