| 摘要: |
| 【目的】分析盐胁迫下黄花菜体内矿质离子含量的变化，为在盐碱地推广种植黄花菜以及利用黄花菜改良盐碱地提供参考。【方法】以山西大同黄花菜为材料，采用营养液水培法，以正常营养液培养为对照，研究不同浓度Ca(NO3)2（50，100，150，200，250 mmol/L）胁迫对黄花菜生物量及植株体内矿质离子含量的影响，探讨黄花菜可能的耐盐机制。【结果】随Ca(NO3)2胁迫浓度的提高，黄花菜植株生物量显著降低，根系和叶片Ca2+、Na+、Fe2+、Zn2+及Cl-含量均呈“升高-降低”的变化规律，Mg2+含量逐渐降低，Cu2+含量无明显变化规律，NO-3含量逐渐增加。除Mg2+含量叶片高于根系、Cl-含量随Ca(NO3)2胁迫浓度的提高出现“根叶相当-根低于叶-根高于叶”的变化外，各处理其他矿质离子含量均表现为根系高于叶片。【结论】可在中度（70~150 mmol/L单价盐）以下盐碱地种植黄花菜，扩大其生产规模；通过每年割除地上部逐渐改良盐碱地，使其成为宜耕良田。 |
| 关键词: 黄花菜 盐胁迫 矿质离子 耐盐机制 |
| DOI： |
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| 基金项目:山西省农业科技攻关项目（20150311010-1）；大同市农业科技攻关项目（201468-2） |
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| Effects of Ca(NO3)2 stress on contents of mineral ions in daylily plants |
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HAN Zhiping,ZHANG Haixia,ZHANG Hongli,et al
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| Abstract: |
| 【Objective】This study analyzed the changes of mineral ions in daylily plants to provide reference for extension of daylily cultivition in saline alkaline land and improvement of saline alkali land by planting daylily.【Method】Datong daylily was cultured in Ca(NO3)2 solution at different concentrations (50,100,150,200 and 250 mmol/L) with normal nutrient solution culture as control.The effect of on biomass and contents of mineral ions in daylily plants was studied and the possible mechanism of salt-tolerance of daylily was analyzed.【Result】With the increase of Ca(NO3)2 concentration,biomass of daylily plant decreased significantly and contents of Ca2+,Na+,Fe2+,Zn2+ and Cl- in roots and leaves showed the trend of increasing before decreasing.The content of Mg2+ gradually decreased,the content of Cu2+ had no significant change,while the content of NO-3 gradually increased.With the increase of Ca(NO3)2 concentration,the content of Mg2+ in leaves was higher than that in roots,while the content of Cl- in roots showed the trend of “same-lower-higher” in comparison with that in leaves.The contents of other mineral ions in roots were higher than those in leaves.【Conclusion】Planting daylily in salt-alkaline land and expanding the cultivation scale is feasible.The salt-alkaline soil could be improved to suitable farmland by cutting out the aerial part of daylily every year. |
| Key words: daylily salt stress mineral ions salt-tolerance metabolism |
