不同种源膏桐在干旱胁迫下生理指标的变化.pdfVIP

西北林学院学报2008，23(2)；7～11 Journal of Northwest Forestry University 不同种源膏桐在干旱胁迫下生理指标的变化 吴 涛， 陈少瑜， 彭明俊， 李 丹 (云南省林业科学院云南省森林植物培育与开发利用重点实验室，云南昆明650204) 摘 要：以不同种源膏桐实生盆栽幼苗为试验材料，研究其在自然干旱胁迫下水分饱和亏缺、质膜 相对透性、丙二醛含量、叶绿素含量、脯氨酸含量和可溶性糖含量的变化。结果表明，随着干旱胁迫 时间的延长，红河、永涛和元阳3个种源膏桐的叶绿素含量逐渐缓慢降低，至胁迫末期，分别为对照 的76．85 9，6、53．61 9，6和45．66 9，5；饱和水分亏缺、质膜相对透性、丙二醛含量、脯氨酸含量和可溶性 糖含量呈上升趋势，其中后3个指标的增幅明显，至胁迫末期，分别为对照的465．19 、429．98 和554．85 ，615．22 、627．33 9／6和786．25 ，232．00 、305．13 和294．749／6。综合分析认为，3 个种源膏桐的抗旱能力由强到弱依次为：红河、永涛、元阳。 关键词：膏桐；种源；干旱胁迫；生理指标 中图分类号：$718．43 文献标识码：A 文章编号：1001—7461(2008)02—0007—05 Changes of Physiological Indices ofJatropha curcas from Different Provenances underDrought Stress 、ⅣU Tao。 CHEN Shao-yu。 PENG Ming-jun。LI Dan (TheKeyLaboratory ofForestyPlantCultivation andUtilization， Yunmn Academy of Forestry，Kunming，Yunnan 650204，China) Abstract：The potted seedlings of Jatropha curcas from three provenances，Honghe，Yongtao，and Yuan— yang，were used as experimenta1 materials to test the physiologica1 variations under artificia1 drought stress．The results were as follows．The contents of chlorophyl1 declined slowly during the arid stress pe— riod and reached their minimum contents at the end of stress the 32 day，auounting for 76．85 ，53．6 1 and 45．66 respectively compared with their contro1．At the same time，water saturation deficit，cy— tomembrane permeability，the content of ma1ondia1dehyde，proline and soluble sugar al1 remarkable in— creased．The contents MDA from three provenances accounted for 465．19 、429．98 and 554．85 re— spectively compared with the contro1 at the end of water stress．Proline contents in the seeding from three provenances accounted for 615．22 、627．33 and 786．25 ，rcspectively compared with the control，and for t