| 硝普钠对镧胁迫下黑麦草幼苗光合特性及矿质元素吸收的影响 |
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| 引用本文： | 刘建新,王金成,王瑞娟,贾海燕.硝普钠对镧胁迫下黑麦草幼苗光合特性及矿质元素吸收的影响[J].环境科学学报,2012,32(11):2898-2904. |
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| 作者姓名： | 刘建新 王金成 王瑞娟 贾海燕 |
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| 作者单位： | 陇东学院生命科学与技术学院、甘肃省高校陇东生物资源保护与利用省级重点实验室,庆阳,745000 |
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| 基金项目： | 甘肃省科技支撑计划(No. GK098-1-34) |
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| 摘 要： | 为了探讨一氧化氮(NO)对镧(La)胁迫下牧草生理响应的调节作用,采用水培方法,研究了外源NO供体硝普钠(SNP)对300μmol·L-1LaCl3胁迫下黑麦草幼苗光合特性及矿质元素吸收的影响.结果表明,在La胁迫下,喷施50μmol·L-1SNP显著提高了黑麦草根尖和叶片中NO的含量,叶片光合色素含量、净光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)、气孔限制值(Ls)、PSⅡ最大光化学效率(Fv/Fm)、实际光化学效率(ΦPSⅡ)、光化学猝灭(qP)和地上部K、Ca、Mg、Cu、Fe、Zn、Mn及根系K、Ca、Mg、P、Zn、Fe含量显著提高;叶片胞间CO2浓度(Ci)、非光化学猝灭(NPQ)及地上部La、P和根系Mn含量明显降低.表明NO可通过改善叶片光合活性,维持矿质元素平衡,从而缓解La胁迫对黑麦草光合作用的抑制.
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| 关 键 词： | 硝普钠 镧胁迫 光合特性 叶绿素荧光 矿质元素 黑麦草 |
| 收稿时间： | 2012/2/12 0:00:00 |
| 修稿时间： | 5/6/2012 12:00:00 AM |
Effects of sodium nitroprusside on photosynthetic characteristics and mineral element contents in Lolium perenne L. Seedlings under lanthanum stress |
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| LIU Jianxin,WANG Jincheng,WANG Ruijuan and JIA Haiyan.Effects of sodium nitroprusside on photosynthetic characteristics and mineral element contents in Lolium perenne L. Seedlings under lanthanum stress[J].Acta Scientiae Circumstantiae,2012,32(11):2898-2904. |
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| Authors: | LIU Jianxin WANG Jincheng WANG Ruijuan and JIA Haiyan |
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| Institution: | College of Life Science and Technology, Longdong University/University Provincial Key Laboratory for Protection and Utilization of Longdong Bio-resources in Gansu Province, Qingyang 745000;College of Life Science and Technology, Longdong University/University Provincial Key Laboratory for Protection and Utilization of Longdong Bio-resources in Gansu Province, Qingyang 745000;College of Life Science and Technology, Longdong University/University Provincial Key Laboratory for Protection and Utilization of Longdong Bio-resources in Gansu Province, Qingyang 745000;College of Life Science and Technology, Longdong University/University Provincial Key Laboratory for Protection and Utilization of Longdong Bio-resources in Gansu Province, Qingyang 745000 |
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| Abstract: | |
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| Keywords: | sodium nitroprusside lanthanum stress photosynthetic characteristics chlorophyll fluorescence mineral element Lolium perenne L |
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