|
|||||
|
|
| NaCl胁迫对盐桦幼苗生理特性的影响 | |
| 引用本文： | 李宏,邓江宇,张红,苗翠,包艳丽,程平. NaCl胁迫对盐桦幼苗生理特性的影响[J]. 西北植物学报, 2009, 29(11) |
| 作者姓名： | 李宏 邓江宇 张红 苗翠 包艳丽 程平 |
| 作者单位： | 1. 新疆林业科学院,乌鲁木齐,830000 2. 新疆林业科学院,乌鲁木齐,830000;新疆农业大学,林学与园艺学院,乌鲁木齐,830000 3. 新疆林业勘察设计院,乌鲁木齐,830000 4. 新疆农业大学,林学与园艺学院,乌鲁木齐,830000 |
| 基金项目： | 国家林业局重点科学技术计划项目 |
| 摘 要： | 利用不同NaCl浓度的土壤处理1年生盐桦幼苗,在不同时间分别测定叶片气体交换参数、叶绿素含量及主要渗透物质含量,以探讨盐桦的耐盐机理.结果显示:(1)随着NaCl浓度的增加,净光合速率(P_n)呈下降趋势,当NaCl浓度小于1.6%时,P_n下降以非气孔因素为主,当NaCl浓度大于1.6%时,P_n下降以气孔因素为主;叶片中叶绿素(Chl)含量呈现在1%时有所增加尔后下降的趋势,Chl a/b值则直接降低;相对电导率(Rc)、脯氨酸(Pro)含量、丙二醛(MDA)含量、可溶性糖(Ss)含量均在1.0%～1.8% NaCl呈上升趋势,而在1.8%～2.2% NaCl呈下降趋势;(2)不同盐胁迫时间对气孔导度、胞间CO_2浓度、蒸腾速率、Rc、Ss影响显著,对于P_n、Chl、Pro、MDA影响不显著;(3)盐桦幼苗在1.8% NaCl时能够正常生长,而在2.2% NaCl时全部死亡. |
| 关 键 词： | 盐桦 盐胁迫 气体交换参数 叶绿素含量 渗透物质 |
Physiological Characteristics of Betula halophila Seedlings under NaCl Stress |
|
| LI Hong,DENG Jiang-yu,,ZHANG Hong,MIAO Cui,BAO Yan-li,CHENG Ping. Physiological Characteristics of Betula halophila Seedlings under NaCl Stress[J]. Acta Botanica Boreali-Occidentalia Sinica, 2009, 29(11) | |
| Authors: | LI Hong DENG Jiang-yu ZHANG Hong MIAO Cui BAO Yan-li CHENG Ping |
| Affiliation: | LI Hong1,DENG Jiang-yu1,2,ZHANG Hong3,MIAO Cui2,BAO Yan-li2,CHENG Ping2 (1 Xijiang Academy of Forestry Sciences,Urumqi 830000,China,2 College of Forestry , Horticulture,Xinjiang Agricultural University,3 Forestry Design Institute of Xinjiang,China) |
| Abstract: | One year old seedlings of Betula halophila were subjected to the soil salinity stress with different NaCl concentrations.The leaf gas exchange parameters,chlorophyll content and osmolytes were studied at different times.The results showed that:(1)The net photosynthetic rate(Pn) decreased as soil NaCl concentration increased.When the concentration of NaCl was less than 1.6%,the main cause of Pn decreasing was that the non-stomatal conductance of B.halophila seedlings.When the concentration of NaCl was more t... |
| Keywords: | Betula halophila salt stress leaf gas exchange parameters chlorophyll content osmolytes |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |