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萨如拉，刘景辉，刘伟，白健慧.碱性盐胁迫对燕麦矿质离子吸收与分配的影响[J].麦类作物学报,2014,34(2):261

碱性盐胁迫对燕麦矿质离子吸收与分配的影响

Effects of Alkali Salt Stress on Mineral Ion Absorption and Distribution of Oats

DOI：10.7606/j.issn.1009-1041.2014.02.19

中文关键词: 燕麦盐碱胁迫离子吸收及分配

英文关键词:Oat Alkali stress Mineral element Ion absorption and distribution

基金项目:国家自然科学基金项目(31060174、30660084)；内蒙古自然科学基金项目(2010ZD07、200607010301)；国家现代农业产业技术体系项目（CARS 08 B 5）；内蒙古农业大学科技创新团队项目（NDTD2010 8）。

作者	单位
萨如拉，刘景辉，刘伟，白健慧	(内蒙古农业大学燕麦科技创新团队，内蒙古呼和浩特 010019)

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中文摘要:

为探讨燕麦耐碱性与矿质离子的关系，通过盆栽试验，将碱性盐Na₂CO₃、NaHCO₃按摩尔比1∶1 混合设置不同浓度（0、50和100 mmol·L-1）胁迫处理，分析燕麦耐碱性品种vao 9和碱敏感性品种白燕5号根、茎、叶对Na⁺、K⁺、Ca²⁺、Mg²⁺、Fe²⁺、Cu²⁺、Zn²⁺的吸收及分配规律。结果表明，碱性盐胁迫下2个品种根、茎、叶中Na⁺含量增加，K⁺、Cu²⁺含量下降；Ca²⁺、Mg²⁺含量在根中增加，在茎、叶中下降，Fe²⁺、Zn²⁺含量在不同胁迫程度下和不同器官中变化不同。与白燕5号相比，vao 9吸收的Na⁺总量较低，K⁺、Ca²⁺、Cu²⁺总量较高，Mg²⁺、Fe²⁺、Zn²⁺总量变化不大。在胁迫浓度达到100 mmol·L-1时，vao 9茎中截留Na⁺，叶片中较K⁺、Ca²⁺、Mg²⁺、Fe²⁺、Cu²⁺和Zn²⁺分配较多，而白燕5号叶片中积累Na⁺较多，茎中积累K⁺较多，根中积累Ca²⁺、Mg²⁺、Fe²⁺、Cu²⁺、Zn²⁺较多，从而使碱性盐胁迫下vao 9较白燕5号叶片中保持的Na⁺ / K⁺、Na⁺ / Ca²⁺和Na⁺ / Mg²⁺低。可见，在高浓度碱性盐胁迫下vao 9茎中区域化Na⁺，选择吸收K⁺、Ca²⁺、Cu²⁺，并在叶片中分配较多的矿质离子来保持燕麦体内离子平衡，以适应盐碱胁迫。

英文摘要:

In order to explore the relationship between mineral ion and alkali tolerance of oats, the absorption and distribution characteristics of Na⁺, K⁺, Ca²⁺, Mg²⁺, Fe²⁺, Cu²⁺ and Zn²⁺ in roots, stems, leaves of different varieties oats (alkali tolerant vao 9, alkali sensitive Baiyan 5) under alkali stress (molar ratio of Na₂CO₃, NaHCO₃=1∶1) were studied in potted experiment. Result showed that the Na⁺ content was increased, while K⁺ and Cu²⁺contents were decreased under alkali stress; the contents of Ca²⁺, Mg²⁺ were increased in roots and were decreased in shoots; while Fe²⁺, Zn²⁺contents were different in different stress treatments and different organs of two varieties. Na⁺ absorbed in vao 9 were less than that in Baiyan 5, and K⁺, Ca²⁺, Cu²⁺ absorbed in vao 9 were more than that in Baiyan 5, there were little difference in Mg²⁺, Fe²⁺, Zn²⁺ between two varieties. vao 9 could store Na⁺ in stems and distribute high contents of K⁺, Ca²⁺, Mg²⁺, Fe²⁺, Cu²⁺, and Zn²⁺ in leaves under 100 mmol·L-1 concentration, while Baiyan 5 accumulate the Na⁺ in leaves, K⁺ in stems and Ca²⁺, Mg²⁺, Fe²⁺, Cu²⁺, Zn²⁺ in roots, which led to lower contents of Na⁺ / K⁺, Na⁺/Ca²⁺, Na⁺/ Mg²⁺ in vao 9 that in Baiyan 5. It was concluded that vao 9 could keep ions balance to adapt to alkali stress through compartmentalizing Na⁺ in stem, selective absorption of K⁺, Ca²⁺, Cu²⁺ and distributing high mineral ion in leaves under high alkali stress.

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