CO2浓度倍增和土壤盐胁迫对藜麦生理特征及产量的影响
S162.5; 利用可精准调控CO2浓度的人工气候室,设置2个CO2浓度(常规组:400μmol/mol和倍增组:800μmol/mol),同时设置2个NaCl胁迫浓度(对照组NaCl浓度为0;盐胁迫组400 mmol/L NaCl),探讨CO2浓度倍增和土壤盐胁迫对藜麦生长、生理、叶片离子含量、叶片光合特性和内禀水分利用效率的影响.结果表明,在盐胁迫下,CO2浓度倍增显著提升藜麦光合速率、降低藜麦气孔导度,提高藜麦内禀水分利用效率,从而增加藜麦产量.但是,在CO2浓度倍增处理下,随着藜麦生长,光合速率提升幅度逐渐缩小,藜麦产生光合适应现象.此外,在盐胁迫下,与CO2浓度常规组相比,CO2浓度...
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| Published in | 农业工程学报 Vol. 37; no. 4; pp. 181 - 187 |
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| Main Authors | , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
东北农业大学水利与土木工程学院,哈尔滨 150030%东北农业大学公共管理与法学院,哈尔滨 150030
15.02.2021
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1002-6819 |
| DOI | 10.11975/j.issn.1002-6819.2021.04.022 |
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| Abstract | S162.5; 利用可精准调控CO2浓度的人工气候室,设置2个CO2浓度(常规组:400μmol/mol和倍增组:800μmol/mol),同时设置2个NaCl胁迫浓度(对照组NaCl浓度为0;盐胁迫组400 mmol/L NaCl),探讨CO2浓度倍增和土壤盐胁迫对藜麦生长、生理、叶片离子含量、叶片光合特性和内禀水分利用效率的影响.结果表明,在盐胁迫下,CO2浓度倍增显著提升藜麦光合速率、降低藜麦气孔导度,提高藜麦内禀水分利用效率,从而增加藜麦产量.但是,在CO2浓度倍增处理下,随着藜麦生长,光合速率提升幅度逐渐缩小,藜麦产生光合适应现象.此外,在盐胁迫下,与CO2浓度常规组相比,CO2浓度倍增最终(63 d)降低藜麦叶片Na+浓度达42％,增加藜麦叶片K+浓度达26％,有效调控藜麦叶片中离子平衡,表现出明显的吸K+排Na+的现象.同时,CO2浓度倍增促进藜麦渗透调节,有效调控藜麦叶片水分运动,增加细胞含水率,降低叶片溶质势和水势,提高压力势,维持细胞正常的生理功能.此外,藜麦内禀水分利用效率与藜麦叶水势、溶质势,光合速率和K+浓度呈显著正相关.研究结果有助于深入理解CO2浓度倍增调控作物耐盐性的生理机制,为应对大气CO2浓度升高背景下土壤盐碱化问题,维护生态系统稳定性,保障粮食安全提供参考. |
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| AbstractList | S162.5; 利用可精准调控CO2浓度的人工气候室,设置2个CO2浓度(常规组:400μmol/mol和倍增组:800μmol/mol),同时设置2个NaCl胁迫浓度(对照组NaCl浓度为0;盐胁迫组400 mmol/L NaCl),探讨CO2浓度倍增和土壤盐胁迫对藜麦生长、生理、叶片离子含量、叶片光合特性和内禀水分利用效率的影响.结果表明,在盐胁迫下,CO2浓度倍增显著提升藜麦光合速率、降低藜麦气孔导度,提高藜麦内禀水分利用效率,从而增加藜麦产量.但是,在CO2浓度倍增处理下,随着藜麦生长,光合速率提升幅度逐渐缩小,藜麦产生光合适应现象.此外,在盐胁迫下,与CO2浓度常规组相比,CO2浓度倍增最终(63 d)降低藜麦叶片Na+浓度达42％,增加藜麦叶片K+浓度达26％,有效调控藜麦叶片中离子平衡,表现出明显的吸K+排Na+的现象.同时,CO2浓度倍增促进藜麦渗透调节,有效调控藜麦叶片水分运动,增加细胞含水率,降低叶片溶质势和水势,提高压力势,维持细胞正常的生理功能.此外,藜麦内禀水分利用效率与藜麦叶水势、溶质势,光合速率和K+浓度呈显著正相关.研究结果有助于深入理解CO2浓度倍增调控作物耐盐性的生理机制,为应对大气CO2浓度升高背景下土壤盐碱化问题,维护生态系统稳定性,保障粮食安全提供参考. |
| Author | 李全峰 付强 贺昕瑶 杨爱峥 李志磊 |
| AuthorAffiliation | 东北农业大学水利与土木工程学院,哈尔滨 150030%东北农业大学公共管理与法学院,哈尔滨 150030 |
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| Author_FL | Yang Aizheng Li Quanfeng Li Zhilei Fu Qiang He Xinyao |
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| DocumentTitle_FL | Effects of elevated atmospheric CO2 on physiological characteristics and yield of quinoa to salinity stress |
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| Keywords | 盐分 水分利用效率 光合 离子交换 水势 CO2 |
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| Snippet | S162.5; 利用可精准调控CO2浓度的人工气候室,设置2个CO2浓度(常规组:400μmol/mol和倍增组:800μmol/mol),同时设置2个NaCl胁迫浓度(对照组NaCl浓度为0;盐胁迫组400 mmol/L... |
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| Title | CO2浓度倍增和土壤盐胁迫对藜麦生理特征及产量的影响 |
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