| 甘薯生长发育过程中可溶性糖含量与淀粉积累的关系 |
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| 引用本文： | 沈淞海,沈海铭,吴建华.甘薯生长发育过程中可溶性糖含量与淀粉积累的关系[J].浙江大学学报(农业与生命科学版),1994(4). |
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| 作者姓名： | 沈淞海 沈海铭 吴建华 |
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| 作者单位： | 浙江农业大学农学系，绍兴师范专科学校生化系，浙江省景宁畲族自治县农业局 |
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| 摘 要： | 以甘薯品种徐薯１８为材料，测定了甘薯各生育阶段块根的淀粉积累量和叶片、块根的游离糖含量．结果表明，薯叶总糖含量范围为１．２—７．７ｍｇ／ｇＦＷ．当总糖水平呈上升趋势（还原糖约占总糖的９５％，蔗糖占非还原糖９５％以上）时，块根淀粉积累快；在雨季和收获期，总糖水平下降，还原糖和蔗糖所占比例亦降低，块根淀粉积累速率低．甘薯块根总糖含量在２０．３—３７．０ｍｇ／ｇＦＷ时淀粉积累率高，总糖水平低．在生育前期，随着甘薯的生长，还原糖含量下降而蔗糖含量增加并保持占非还原糖的１００％；在生育后期，还原糖增加而蔗糖含量下降（但仍保持占非还原糖９０％以上）．淀粉积累率低时，块根总糖水平急剧升高．
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| 关 键 词： | 甘薯 淀粉积累 游离糖 |
Relation of starch accumulation with free sugars in the sweet potato(Lpomoea batatas) |
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| Shen Songhai,Shen Haiming,WuJianhua.Relation of starch accumulation with free sugars in the sweet potato(Lpomoea batatas)[J].Journal of Zhejiang University(Agriculture & Life Sciences),1994(4). |
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| Authors: | Shen Songhai Shen Haiming WuJianhua |
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| Abstract: | The relation of starch accumulation with free sugars at different growth stages in the sweet potato variety Xushu 18 was studied.When starch accumulated at a high rate,the total sugar levels showed an upward trend in leaves and a falling tendency in tubers,and the ratio of reducing sugars to total sugars kept as high as 95%in leaves,and that of sucrose to total nonreducing sugars was almost at 100%in both leaves and tubers.Starch accumlation rate declined in raining days and at the harvest time,the contents of the reducing sugars in tubers and the nonreducing sugars (ex-cept sucrose)in leaves and tubers were greatly increased. |
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| Keywords: | sweet potato starch accumulation free sugar |
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