光强对黑豆芽苗菜生长和营养品质的影响

Effects of Light Intensity on Growth and Nutritional Quality of Black Soybean Sprouts

采用发光二极管(light emitting diode,LED)精确调制光强,研究不同光强对黑豆芽苗菜生长和营养品质的影响。结果表明:与黑暗培养相比,光强为3、9、15μmol·m-2·s-1时黑豆芽苗菜的下胚轴直径显著增加;光强为3μmol·m-2·s-1时黑豆芽苗菜的VC含量显著增加;光强为9μmol·m-2·s-1时黑豆芽苗菜的可溶性蛋白、可溶性糖和蔗糖含量显著增加,并且POD活性显著提高。在3～15μmol·m-2·s-1的光强范围内,黑豆芽苗菜的叶绿素a、叶绿素b、叶绿素a+b及类胡萝卜素含量均显著高于黑暗培养,并且各色素含量均随着光强的增大而显著增加。总体而言,3～9μmol·m-2·s-1的光强培养有利于黑豆芽苗菜的生长和部分营养品质的改善。

Light emitting diode(LED)was applied to accurately modulate light intensity. The effects of light intensity on growth and nutritional quality of black soybean(Glycine max) sprouts were studied.The results indicated that compared with cultivation in darkness,the hypocotyl diameter was significantly increased when the light intensity were 3 μmol·m-2·s-1 ,9 μmol·m-2·s-1 and 15 μmol·m-2·s-1 .The content of VC was significantly increased when the light intensity was 3 μmol·m-2·s-1 .The contents of soluble protein,soluble sugar,sucrose and the activity of POD were significantly increased when the light intensity was 9 μmol·m-2·s-1 . Under the light intensity of 3-15 μmol·m-2·s-1 ,the contents of chlorophyll a,chlorophyll b, chlorophyll a+b and carotenoid were significantly higher than that of those cultured in darkness. And various pigment contents were increased with the increase of light intensity.In general,the light intensity of 3-9 μmol·m-2·s-1 was beneficial for the growth and improvement of some nutritional qualities of black soybean sprouts.