| 外源色氨酸对海水胁迫长春花幼苗根CCO活性和叶绿体超微结构的影响 |
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| 引用本文： | 刘玲,刘冲,郑青松,刘兆普,李洪燕. 外源色氨酸对海水胁迫长春花幼苗根CCO活性和叶绿体超微结构的影响[J]. 西北植物学报, 2009, 29(12) |
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| 作者姓名： | 刘玲 刘冲 郑青松 刘兆普 李洪燕 |
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| 作者单位： | 1. 南京农业大学资源与环境科学学院,江苏省海洋生物学重点实验室,南京,210095
2. 南京农业大学资源与环境科学学院,江苏省海洋生物学重点实验室,南京,210095;江苏沿海地区农业科学研究所,江苏盐城,224002 |
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| 基金项目： | 国家海洋863资助项目 |
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| 摘 要： | 以长春花[Catharanthus roseus (L.) G.Don]幼苗为材料,在温室条件下研究了不同浓度色氨酸对20%海水处理14 d后长春花幼苗生长、线粒体细胞色素c氧化酶(CCO)活性、细胞超微结构及长春碱含量的影响.结果显示:(1)与对照相比,20%海水中加入不同浓度的色氨酸,长春花幼苗生长均受到进一步显著抑制,线粒体细胞色素c氧化酶活性下降,但幼苗长春碱含量显著增加.(2) 在20%海水中增加250和500 mg/L色氨酸时,叶绿体片层松散、变稀,色氨酸浓度增大到750 mg/L时,叶绿体变形,片层扭曲、变形,叶绿体模糊、濒临解体.研究表明,在20%海水中增加500 mg/L的色氨酸时,长春花生长受到抑制较小,叶绿体超微结构受损伤程度较轻,而长春碱含量提高幅度最大,从而较有利于长春花幼苗的生长和长春碱的积累.
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| 关 键 词： | 长春花 幼苗 海水胁迫 色氨酸 长春碱含量 细胞超微结构 |
Effects of Exogenous Tryptophan on the CCO Activity of Root and Cell Ultrastructure of Catharanthus roseus Seedlings under Seawater Stress |
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| LIU Ling,LIU Chong,ZHENG Qing-song,LIU Zhao-pu,LI Hong-yan. Effects of Exogenous Tryptophan on the CCO Activity of Root and Cell Ultrastructure of Catharanthus roseus Seedlings under Seawater Stress[J]. Acta Botanica Boreali-Occidentalia Sinica, 2009, 29(12) |
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| Authors: | LIU Ling LIU Chong ZHENG Qing-song LIU Zhao-pu LI Hong-yan |
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| Affiliation: | LIU Ling1,LIU Chong1,2,ZHENG Qing-song1,LIU Zhao-pu1,LI Hong-yan1(1 College of Resources , Environmental Sciences,Key Laboratory of Marine Biology,Jiangsu Province,Nanjing Agricultural University,Nanjing 210095,China,2 Institute of Agricultural Sciences of Jiangsu Coastal District,Yancheng,Jiangsu 224002,China) |
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| Abstract: | Potted experiments in greenhouse were carried out to study the effect of exogenous tryptophan on growth,cell ultrastructure,cytochrome oxidase activity and vinblastine content of Catharanthus roseus under 20% seawater stress.The results showed as follows:(1)Compare with the control,dry weight of seedlings and cytochrome oxidase activity in root mitochondria were decreased markedly under 20% seawater stress.Furthermore,addition of supplemental tryptophan to the 20% seawater-treated medium inhibited seedling ... |
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| Keywords: | Catharanthus roseus seedlings seawater stress tryptophan vinblastine content cell ultrastructure |
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