| NaCl和NaHCO3胁迫下马蔺生长与光合特性的反应 |
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| 引用本文： | 白文波,李品芳,李保国.NaCl和NaHCO3胁迫下马蔺生长与光合特性的反应[J].土壤学报,2008,45(2):328-335. |
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| 作者姓名： | 白文波 李品芳 李保国 |
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| 作者单位： | 中国农业大学资源与环境学院,植物-土壤相互作用教育部重点实验室,北京,100094 |
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| 摘 要： | 采用室内水培实验,以马蔺(Iris lactea Pall.var.chinensis(Fisch.)Koidz.)为研究对象,探讨盐(NaCl)、碱(NaHCO3)胁迫对植株生长、水分状况、质膜透性、叶片叶绿素含量和光合特性的影响,初步比较盐碱胁迫效应的差异。结果表明,在相同Na+浓度下,NaHCO3胁迫组对马蔺生长的抑制、细胞质膜透性的破坏以及叶绿素含量的减少程度均明显大于NaCl胁迫组,这可能是因为碱性盐胁迫下特有的高盐和高pH的共同作用。同时,盐碱胁迫对茎叶生长的抑制作用大于根系,对鲜重的影响大于干重。随着胁迫浓度的增加和胁迫时间的延长,马蔺叶片叶绿素含量显著降低。同时,叶片的电解质外渗率与植株含水量呈显著负相关。碱性盐胁迫下马蔺光合速率下降主要受非气孔限制,而中性盐胁迫下既有气孔限制,又有非气孔限制。
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| 关 键 词： | 马蔺 盐碱胁迫 质膜透性 叶绿素 光合特性 |
| 收稿时间： | 2006/12/19 0:00:00 |
| 修稿时间： | 2006年12月19 |
RESPONSE OF IRIS LACTEA VAR.CHINENSIS TO NaCl AND NaHCO3 STRESS IN GROWTH AND PHOTOSYNTHESIS |
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| Bai Wenbo,Li Pinfang and Li Baoguo.RESPONSE OF IRIS LACTEA VAR.CHINENSIS TO NaCl AND NaHCO3 STRESS IN GROWTH AND PHOTOSYNTHESIS[J].Acta Pedologica Sinica,2008,45(2):328-335. |
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| Authors: | Bai Wenbo Li Pinfang and Li Baoguo |
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| Institution: | Bai Wenbo Li Pinfang Li Baoguo(College of Resources and Environmental Sciences,Key Laboratory of Plant-Soil Interactions,Ministry of Education,China Agricultural University,Beijing 100094,China) |
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| Abstract: | A hydroponical culture experiment of Iris lactea was conducted to explore responses of the plants to NaCl and NaHCO3 stress(0,70,210,350 mmol L-1)for 10 days in plant growth,water status,cell membrane permeability,chlorophyll content and photosynthetic characteristics.Results indicate that Treatments NaHCO3 were much higher than Treatments NaCl,the same in Na+ concentration,in effect inhabiting growth,decreasing water content,damaging cell membrane permeability and reducing chlorophyll content,which may pro... |
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| Keywords: | Iris lactea var chinensis Saline-alkali stress Cell membrane permeability Chlorophyll Photosynthetic characteristics |
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