| 盐胁迫对不同藜麦品种幼苗生长及CqNHX1基因表达的影响 |
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| 引用本文： | 时丕彪,王军,费月跃,洪立洲,王伟义,吕远大,顾闽峰.盐胁迫对不同藜麦品种幼苗生长及CqNHX1基因表达的影响[J].中国农学通报,2020,36(33):19-24. |
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| 作者姓名： | 时丕彪 王军 费月跃 洪立洲 王伟义 吕远大 顾闽峰 |
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| 作者单位： | 1.盐城市新洋农业试验站,江苏盐城 224049;2.江苏省农业科学院种质资源与生物技术研究所,南京 210014 |
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| 基金项目： | 江苏省农业科技自主创新资金项目“营养型作物藜麦矮杆品种密植机械化栽培技术创新”(CX193116);国家自然科学基金面上项目“玉米α-醇溶蛋白基因eQTL定位及调控网络解析”(31771813);江苏省现代农业产业体系项目“江苏现代农业(蔬菜)产业技术体系(盐城)推广示范基地”(JATS2018137);江苏省农业科学院探索性颠覆性创新计划项目“构建新型农作物DNA身份检测系统”(ZX172015) |
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| 摘 要： | 为了筛选出耐盐性较强的藜麦品种并为苗期耐盐性鉴定提供参考,以3个不同的藜麦品种为试验材料,在盐胁迫下用测量法测定其相关生长指标,紫外分光光度计法测定叶绿素含量,电导法测定相对离子渗透率,并利用实时荧光定量PCR法比较了耐盐基因CqNHX1的相对表达量。结果表明,NaCl胁迫下SQ1株高降幅较小,生物量有所增加,相对离子渗透率几乎不变,且CqNHX1a和CqNHX1b表达量均极显著升高,说明SQ1在高盐环境下能正常生长;SQ34的株高和叶绿素含量均显著降低,生物量保持不变,而CqNHX1a和CqNHX1b表达量均显著升高;QQ61的根冠比和叶绿素含量极显著下降,相对离子渗透率极显著升高,CqNHX1a和CqNHX1b呈下调表达,说明该品种耐盐性较弱。藜麦品种间耐盐性存在显著差异,耐盐性强弱为：SQ1 > SQ34 > QQ61,SQ1作为高耐盐品种,可在盐碱地进一步推广种植。
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| 关 键 词： | 藜麦 盐胁迫 幼苗生长 CqNHX1基因表达 耐盐性 |
| 收稿时间： | 2019-12-05 |
Effects on Seedling Growth and CqNHX1 Gene Expression of Different Quinoa Varieties: Salt Stress |
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| Shi Pibiao,Wang Jun,Fei Yueyue,Hong Lizhou,Wang Weiyi,Lv Yuanda,Gu Minfeng.Effects on Seedling Growth and CqNHX1 Gene Expression of Different Quinoa Varieties: Salt Stress[J].Chinese Agricultural Science Bulletin,2020,36(33):19-24. |
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| Authors: | Shi Pibiao Wang Jun Fei Yueyue Hong Lizhou Wang Weiyi Lv Yuanda Gu Minfeng |
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| Institution: | 1.Xinyang Agricultural Experiment Station of Yancheng City, Yancheng Jiangsu 224049;2.Institute of germplasm resources and biotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing 210014 |
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| Abstract: | In order to select out the quinoa varieties with strong salt tolerance and provide reference for the identification of salt tolerance at seedling stage, three different quinoa varieties were used as experiment materials. The relative growth indexes were determined by measurement, the chlorophyll content was determined by ultraviolet spectrophotometer, the relative ion permeability was determined by conductance method, and the relative expression of salt-tolerant gene CqNHX1 was compared by real-time quantitative PCR under salt stress. The results showed that the plant height of SQ1 was decreased slightly, the biomass was increased, the relative ion permeability remained almost unchanged, and the expression levels of CqNHX1a and CqNHX1b were both significantly increased under salt stress, indicating that SQ1 could grow normally under a high salt environment. Compared with the control, the plant height and chlorophyll content of SQ34 was significantly decreased, the biomass remained unchanged, while the expression levels of CqNHX1a and CqNHX1b were significantly increased. The root-shoot ratio and chlorophyll content of QQ61 were significantly decreased under salt stress, while the relative ion permeability was significantly increased, and the expressions of CqNHX1a and CqNHX1b were down-regulated, demonstrating that the salt tolerance of this variety was weak. Salt tolerance between different quinoa varieties differed remarkably, the rank was: SQ1 > SQ34> QQ61. SQ1, as a high salt tolerant variety, can be further popularized in saline-alkali land. |
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| Keywords: | quinoa salt stress seedling growth CqNHX1 gene expression salt tolerance |
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