| 玉米抗感种质资源苗期耐盐性的光合作用机制研究 |
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| 引用本文： | 王明泉,付立新,李国良,扈光辉,任洪雷,胡少新,杨剑飞,刘畅,龚士琛.玉米抗感种质资源苗期耐盐性的光合作用机制研究[J].中国农学通报,2021,37(5):8-14. |
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| 作者姓名： | 王明泉 付立新 李国良 扈光辉 任洪雷 胡少新 杨剑飞 刘畅 龚士琛 |
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| 作者单位： | 黑龙江省农业科学院玉米研究所,哈尔滨 150086 |
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| 基金项目： | 国家重点研发计划“东北北部春玉米、粳稻水热优化配置丰产增效关键技术研究与模式构建”(2017YFD0300506);国家重点研发计划“东北早熟区玉米种质改良与强优势杂交种创制”(2016YFD0101202);黑龙江省农业科学院科研项目“玉米苗期耐盐性生理机制研究及转录组分析”(2019KYJL014);国家重点研发项目省级资助“黑龙江省春玉米、粳稻丰产增效模式构建与超高产关键技术研究”(GY18B029);黑龙江省农业科学院科研科技创新专项“高配合力、多抗、优质玉米育种素材创制与新品种选育”(HNK2019CX03) |
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| 摘 要： | 土壤盐渍化程度日趋严重,成为影响作物生长发育、制约产量的一个主要环境因子,明确玉米苗期耐盐的光合作用机制尤为重要。本研究采用水培法,对已耐盐性鉴定筛选的强耐盐型自交系(B46)和盐高度敏感型自交系(NC236)为材料,分析二者在盐胁迫条件下光合作用的变化。低浓度盐(55 mmol/L NaCl)胁迫条件可促进玉米自交系幼苗叶绿素含量的增加,较NC236,B46增幅较大;随着NaCl浓度进一步增加,两玉米自交系幼苗叶绿素含量均呈下降趋势,较NC236,B46降幅较小。在盐胁迫条件下,较NC236,B46的Fv/Fm、Fv/Fo、qP、Fo的变化幅度较小,NPQ的增幅较大。B46在NaCl浓度0~165 mmol/L范围内为气孔关闭引起的气孔限制,220 mmol/L时为光合系统遭到破坏引起的非气孔限制;NC236在NaCl浓度为0~110 mmol/L范围内为气孔限制,165~220 mmol/L时为非气孔限制。
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| 关 键 词： | 玉米 盐胁迫 光合作用 耐盐机制 |
| 收稿时间： | 2020-04-27 |
The Photosynthesis Mechanism of Tolerant and Sensitive Maize Germplasm Resources Under Salt Tolerance at Seedling Stage |
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| Wang Mingquan,Fu Lixin,Li Guoliang,Hu Guanghui,Ren Honglei,Hu Shaoxin,Yang Jianfei,Liu Chang,Gong Shichen.The Photosynthesis Mechanism of Tolerant and Sensitive Maize Germplasm Resources Under Salt Tolerance at Seedling Stage[J].Chinese Agricultural Science Bulletin,2021,37(5):8-14. |
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| Authors: | Wang Mingquan Fu Lixin Li Guoliang Hu Guanghui Ren Honglei Hu Shaoxin Yang Jianfei Liu Chang Gong Shichen |
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| Institution: | Maize Research Institute of Heilongjing Academy of Agricultural Sciences, Harbin Heilongjiang 150086 |
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| Abstract: | The increasing level of soil salinization has gradually become a major environmental factor affecting plant growth and restricting grain yield. In the study, salt tolerant inbred line B46 and salt sensitive inbred line NC236 were selected as experimental materials to analyze the variation of the photosynthesis under salt tolerance at seedling stage. Under low concentration (55 mmol/L NaCl) salt stress, the content of chlorophyll in maize inbred lines increased. The content of chlorophyll in the leaves of B46 increased significantly compared with that of NC236. With the increase of NaCl concentration, the content of chlorophyll in the two maize inbred lines presented a downward trend, and the content decrease of B46 was less than that of NC236. The amplitude change of the maximum photochemical efficiency (Fv/Fm), the potential photochemical efficiency (Fv/Fo), the photochemical quenching coefficient (qP) and the initial fluorescence (Fo) of B46 were small under salt stress compared with that of NC236. While the amplitude change of the non-photochemical quenching coefficient (NPQ) was large. B46 showed stomatal limitation under the NaCl concentration from 0 to 165 mmol/L because of stomatal closure, and had non-stomatal limitation under the NaCl concentration of 220 mmol/L because the photosynthsis system was damaged; NC236 showed stomatal limitation in the NaCl concentration from 0 to 110 mmol/L, and non-stomatal limitation in the NaCl concentration from 165 to 220 mmol/L. |
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| Keywords: | maize (Zea mays) salt stress photosynthesis salt tolerance mechanism |
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