盐胁迫对冬小麦苗期Na~+、K~+吸收分配及限钠能力的影响
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摘要
为明确盐胁迫对冬小麦苗期无机离子吸收与分配的影响,选用盐敏感型济麦22和耐盐型青麦6号两个品种进行NaCl胁迫处理,研究苗期根部和地上部对Na~+、K~+的吸收情况。结果表明:随NaCl浓度的增加和胁迫时间的延长,2个小麦品种根部和地上部的Na~+含量升高,K~+含量和K~+/Na~+比值都呈下降趋势,而且根部3个指标的变化幅度都大于地上部,济麦22的变化幅度大于青麦6号。说明青麦6号通过根部吸收较多的Na~+,并限制向地上部的运输以维持较高的K~+/Na~+值和限钠能力,进而提高耐盐性能。
The aim of this study was to explore the effects of salt stress on the absorption and distribution of inorganic ions in winter wheat seedlings. Salt-sensitive cultivar Jimai 22 and salt-tolerant cultivar Qingmai 6 were exposed to the NaCl stress to study the absorption of Na~+ and K~+ by roots and shoots at seedling stage. The results showed that, with the increase of NaCl concentration and the prolongation of stress time, the total Na~+ concentration of roots and shoots increased, but K~+ content and K~+/Na~+ ratio decreased. Furthermore, the three parameters showed higher variation in roots than in shoots, and the variation range of Jimai 22 was larger than that of Qingmai 6. This indicated that Qingmai 6 could absorb more Na~+ through roots and restrict Na~+ transportation to the shoots for maintaining a higher K~+/Na~+ ratio and ability of limiting sodium to improve its salt tolerance.
The aim of this study was to explore the effects of salt stress on the absorption and distribution of inorganic ions in winter wheat seedlings. Salt-sensitive cultivar Jimai 22 and salt-tolerant cultivar Qingmai 6 were exposed to the NaCl stress to study the absorption of Na~+ and K~+ by roots and shoots at seedling stage. The results showed that, with the increase of NaCl concentration and the prolongation of stress time, the total Na~+ concentration of roots and shoots increased, but K~+ content and K~+/Na~+ ratio decreased. Furthermore, the three parameters showed higher variation in roots than in shoots, and the variation range of Jimai 22 was larger than that of Qingmai 6. This indicated that Qingmai 6 could absorb more Na~+ through roots and restrict Na~+ transportation to the shoots for maintaining a higher K~+/Na~+ ratio and ability of limiting sodium to improve its salt tolerance.
引文
[1] 沈丹丹,程文,王志武,等.我国玉米耐盐种质研究现状与展望[J].山东农业科学,2018,50(11):163-167.
[2] 阮建,李娜娜,崔海燕,等.50个小麦品种的苗期耐盐性比较[J].山东农业科学,2017,49(4):5-9,20.
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[4] 李青松.不同基因型冬小麦对钠、钾离子吸收及耐盐机制研究[D].杨凌:西北农林科技大学,2009.
[5] 刘艳丽,刘桂珍,茹德平,等.NaCl胁迫下不同品种小麦苗期渗透调节物质含量的变化[J].山东农业科学,2015,47(4):37-39.
[6] Parida A K,Das A B,Mittra B.Effects of salt on growth,ion accumulation,photosynthesis and leaf anatomy of the mangrove,Bruguiera parviflora[J].Trees,2004,18(2):167-174.
[7] 丁顺华,李艳艳,王宝山.外源海藻糖对小麦苗期耐盐性的影响[J].西北植物学报,2005,25(3):513-518.
[8] 王焕文,杨秀凤,王明友,等.盐度对小麦光合效应和 Na+、Cl-积累量的影响[J].土壤肥料,1996(5):17-18.
[9] 高荣嵘,郭峰,万书波.干旱预处理对NaCl胁迫下花生幼苗生理特性的影响[J].山东农业科学,2018,50(6):79-85.
[10] 时丽冉,白丽荣,崔兴国.NaCl 胁迫对不同耐盐性小黑麦苗期Na+、 K+、Cl-吸收及分配的影响[J].麦类作物学报,2014,34(4):546-551.
[11] 夏阳,林杉,陶洪斌,等.不同基因型小麦对NaCl胁迫的反应[J].植物营养与肥料学报,2000,6(4):417-423.
[12] 王雪青,张俊文,魏建华,等.NaCl胁迫下野大麦耐盐生理机制初探[J].华北农学报,2007,22(1):17-21.
[13] 王丽燕,赵可夫.玉米苗期对NaCl胁迫的生理响应[J].作物学报,2005,31(2):264-266.
[14] Hao X,Wang L Q,Zhou C J,et al.Effects of salt stress on the absorption and accumulation of Na+ and K+ in seedlings of four winter wheat (Tritium aestivum) genotypes[J].Acta Ecologica Sinica,2007,27(1):205-213.
[15] 景艳霞,袁庆华.NaCl胁迫对苜蓿幼苗生长及不同器官中盐离子分布的影响[J].草业学报,2011,20(2):134-139.山东 农业 科学 2019,51(4):39～43
[2] 阮建,李娜娜,崔海燕,等.50个小麦品种的苗期耐盐性比较[J].山东农业科学,2017,49(4):5-9,20.
[3] 孟祥浩.不同小麦品种耐盐生理生化特性及产量的研究[D].青岛:青岛农业大学,2016.
[4] 李青松.不同基因型冬小麦对钠、钾离子吸收及耐盐机制研究[D].杨凌:西北农林科技大学,2009.
[5] 刘艳丽,刘桂珍,茹德平,等.NaCl胁迫下不同品种小麦苗期渗透调节物质含量的变化[J].山东农业科学,2015,47(4):37-39.
[6] Parida A K,Das A B,Mittra B.Effects of salt on growth,ion accumulation,photosynthesis and leaf anatomy of the mangrove,Bruguiera parviflora[J].Trees,2004,18(2):167-174.
[7] 丁顺华,李艳艳,王宝山.外源海藻糖对小麦苗期耐盐性的影响[J].西北植物学报,2005,25(3):513-518.
[8] 王焕文,杨秀凤,王明友,等.盐度对小麦光合效应和 Na+、Cl-积累量的影响[J].土壤肥料,1996(5):17-18.
[9] 高荣嵘,郭峰,万书波.干旱预处理对NaCl胁迫下花生幼苗生理特性的影响[J].山东农业科学,2018,50(6):79-85.
[10] 时丽冉,白丽荣,崔兴国.NaCl 胁迫对不同耐盐性小黑麦苗期Na+、 K+、Cl-吸收及分配的影响[J].麦类作物学报,2014,34(4):546-551.
[11] 夏阳,林杉,陶洪斌,等.不同基因型小麦对NaCl胁迫的反应[J].植物营养与肥料学报,2000,6(4):417-423.
[12] 王雪青,张俊文,魏建华,等.NaCl胁迫下野大麦耐盐生理机制初探[J].华北农学报,2007,22(1):17-21.
[13] 王丽燕,赵可夫.玉米苗期对NaCl胁迫的生理响应[J].作物学报,2005,31(2):264-266.
[14] Hao X,Wang L Q,Zhou C J,et al.Effects of salt stress on the absorption and accumulation of Na+ and K+ in seedlings of four winter wheat (Tritium aestivum) genotypes[J].Acta Ecologica Sinica,2007,27(1):205-213.
[15] 景艳霞,袁庆华.NaCl胁迫对苜蓿幼苗生长及不同器官中盐离子分布的影响[J].草业学报,2011,20(2):134-139.山东 农业 科学 2019,51(4):39～43