光质与马铃薯块茎细胞信号分子和糖苷生物碱积累的关系

被引：29

作者：

王旺田 ^{[1
,2
]}

张金文 ^{[1
,2
]}

王蒂 ^{[1
,2
]}

陶士珩 ^{[3
]}

季彦林 ^{[1
]}

吴兵 ^{[1
]}

机构：

[1] 甘肃农业大学农学院

[2] 甘肃省作物遗传改良与种质创新重点实验室

[3] 西北农林科技大学生命科学学院

来源：

作物学报 | 2010年 / 36卷 / 04期

关键词：

马铃薯; 光质; 信号转导分子; 糖苷生物碱;

D O I：

暂无

中图分类号：

S532 [马铃薯（土豆）];

学科分类号：

摘要：

马铃薯块茎糖苷生物碱(SGAs)含量如果超过20mg100g-1FW,人畜食用即可引起中毒。而马铃薯块茎中SGAs的积累受多种因素的影响,其中受温度与光照影响较大。为减少马铃薯块茎中SGAs的积累,了解SGAs在马铃薯块茎中的积累机制,研究了同一温度下不同光质对马铃薯块茎SGAs的积累的影响。结果表明红光照射后各品种SGAs平均含量比蓝光、白光、黑暗处理分别提高26.02%、55.50%和100.79%,且在α=0.01水平上差异极显著,说明不同光质对马铃薯块茎SGAs含量影响不同,红光影响最大,蓝光次之。同时,马铃薯块茎经不同光质处理后作为第二信使的G蛋白含量在红光下较蓝光、黑暗、白光下分别上升0.95%、2.01%、3.86%,钙调蛋白含量分别增加7.94%、37.41%和87.24%。由此可知,红光是SGAs积累的重要信号分子,其信号作用启动了红光受体PHYB,与第二信使G蛋白和CaM等共同参与马铃薯块茎SGAs的代谢积累。

引用

收藏

页码：629 / 635

页数：7

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