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钾对番红花球茎膨大的生理生态效应 被引量:7

Physiological and ecological effects of potassium on expansion of crocus corm.
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摘要 名贵中药番红花球茎的大小是决定其入药器官—柱头多少的关键 .用 4个不同K水平的营养液培养番红花 ,结果表明 ,随着施钾水平的提高 ,叶片中的钾含量、叶绿素含量、ATP相对含量及叶片净光合速率也相应提高 ,使得叶片作为“代谢源”的能力加强 .随着施钾水平提高 ,新球茎富集钾的能力、可溶性糖含量、Vc含量和蛋白质含量也增加 ,致使新球茎作为“代谢库”的功能也增强 ,球茎膨大速率加快 ..本文对钾元素通过加强“源”和“库”的功能来提高番红花球茎膨大速率的机理进行探讨 。 The corm size of Crocus sativus,a well-known medicine,is a key limiting factor for its stigma harvest.A water cultural experiment with four different potassium (K) concentrations showed that the K content,chlorophyll content,relative ATP content and net photosynthetic rate in C.sativus leaves increased with improving K concentration,which enhanced the function of leaves to be metabolic source.On the other hand,the K absorbing ability and the contents of soluble sugars,vitamin C (Vc) and protein in new-born corms were increased with improving K concentration,which also strengthened the function of new-born corms to be metabolic sink.This study also showed that K could promote the new-born corm growth rate of C.sativus through strengthening the function of “source' and “sink'.
出处 《应用生态学报》 CAS CSCD 2004年第4期663-666,共4页 Chinese Journal of Applied Ecology
基金 国家自然科学基金资助项目 ( 3 0 3 70 2 78) 重庆市科委资助项目( 2 0 0 2 75 3 5 )
关键词 番红花 球茎膨大 生理生态效应 Crocus sativus, Potassium, Expansion of corms, Physiological and ecological effects.
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