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大豆科学  2015 

UV-A辐射对大豆芽苗菜中抗坏血酸含量的影响

DOI: 10.11861/j.issn.1000-9841.2015.03.0420, PP. 420-426

Keywords: 大豆芽苗菜,UV-A,抗坏血酸,DHAR,GR

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Abstract:

以黑暗培养为对照,以白光、红光、蓝光、黄光、UV-A和UV-B为处理,研究了不同光质对大豆芽苗菜生长和抗坏血酸含量的影响。结果表明:与对照相比,光照处理显著降低了大豆芽苗菜下胚轴的长度(白光除外),且显著提高了下胚轴和子叶中抗坏血酸含量。与其它光质处理相比,UV-A连续光照36h后,下胚轴和子叶中抗坏血酸含量提高最显著。进一步着重研究了UV-A的调节机理,与对照相比,UV-A连续光照36h后,大豆芽苗菜子叶中谷胱甘肽含量显著升高,下胚轴和子叶中DHAR、GR酶活性及其基因的相对表达量均显著提高。综上所述,光照有利于大豆芽苗菜中抗坏血酸含量的积累;UV-A可能是通过提高DHAR、GR酶活性及基因的表达量显著提高抗坏血酸的含量。

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