NaCl胁迫对三种狼尾草生长及生理特性的影响
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摘要
为掌握3种狼尾草的耐盐性,对它们进行为期30d的NaCl盐胁迫试验,设置5个土壤含盐量梯度处理,分别为0.25,0.35,0.50,0.60,0.8g·kg~(-1),以清水为对照。测定相关形态及生理指标,结合死亡率、枯叶率和茎叶生长量进行分析。结果表明:3种狼尾草耐盐能力由强至弱的次序为长穗狼尾草、矮株狼尾草、东方狼尾草,它们能够忍受的土壤NaCl含量分别为0.60,0.60,0.50g·kg~(-1)。随着土壤含盐量的增加,3种狼尾草叶片中SOD及CAT的活性均呈现先升高后降低的变化趋势;MDA含量呈先上升后下降,最后又上升的变化趋势,且与SOD和CAT活性的变化有一定的关系。
In order to investigate the salt tolerance of three Pennisetumspecies,NaCl stress test was carried out for a period of 30 days.Five treatments of different soil salinity,including 0.25,0.35,0.50,0.60 and 0.80 g·kg~(-1),were set up to study their morphological and physiological changes.Taking water treatment as control.Based on mortality,the percentages of dead leaves and the growth of stalk and leaf,the results showed that the order of the salt tolerance of three species from strong to weak was as follows:Pennisetum alopecuroides Changsui,P.alopecuroides Aizhu and P.orientale;and the soil salinity they were able to tolerate were 0.60,0.60 and 0.50 g·kg~(-1),respectively.With increasing soil salinity,the activity of SOD and CAT in the leaves of all three Pennisetumspecies showed a trend of increasing first and then decreasing.The content of MDA increased at first and then decreased,finally increased,which was related to the changes of SOD and CAT activities.
In order to investigate the salt tolerance of three Pennisetumspecies,NaCl stress test was carried out for a period of 30 days.Five treatments of different soil salinity,including 0.25,0.35,0.50,0.60 and 0.80 g·kg~(-1),were set up to study their morphological and physiological changes.Taking water treatment as control.Based on mortality,the percentages of dead leaves and the growth of stalk and leaf,the results showed that the order of the salt tolerance of three species from strong to weak was as follows:Pennisetum alopecuroides Changsui,P.alopecuroides Aizhu and P.orientale;and the soil salinity they were able to tolerate were 0.60,0.60 and 0.50 g·kg~(-1),respectively.With increasing soil salinity,the activity of SOD and CAT in the leaves of all three Pennisetumspecies showed a trend of increasing first and then decreasing.The content of MDA increased at first and then decreased,finally increased,which was related to the changes of SOD and CAT activities.
引文
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[2]陈超,袁小环,滕文军,等.狼尾草属植物生物学特性、生态适应性、观赏性和入侵风险关系的探讨[J].生态学杂志,2017,36(2):374-381.
[3]武菊英.生态和观赏效果俱佳的狼尾草[J].中国花卉园艺,2003(2):32.
[4]袁小环,孙男,滕文军,等.9种观赏草苗期耐盐性评价及NaCl胁迫对芨芨草生长的影响[J].植物资源与环境学报,2011,20(3):69-75.
[5]慈华聪,田晓明,张楚涵,等.不同盐分处理对狼尾草和大油芒发芽与幼苗生长的影响[J].生态学杂志,2013,32(5):1168-1174.
[6]陈刚,李胜.植物生理学实验[M].北京:高等教育出版社,2016.
[7]谭笑,高祥斌.大花萱草耐盐性研究[J].湖北农业科学,2016,55(12):3122-3127.
[8]李辉,李德芳,陈安国,等.植物耐盐研究概况[J].中国麻业科学,2007,29(4):227-232.
[9]高宇,徐春莹,王丹,等.NaCl预处理对盐胁迫下水稻H2O2含量和过氧化氢酶活力的影响[J].安徽农业科学,2014,42(36):12814-12815.
[10]张兆英,于秀俊.植物抗盐性评价生理指标的分析[J].沧州师范专科学校学报,2006,22(4):51-53.
[11]李彦,张英鹏,孙明,等.盐分胁迫对植物的影响及植物耐盐机理研究进展[J].中国农学通报,2008,24(1):258-265.
[12]张兆英,于秀俊.植物抗盐性评价生理指标的分析[J].沧州师范专科学校学报,2006,22(4):51-53.
[13]张冠初,张智猛,慈敦伟,等.干旱和盐胁迫对花生渗透调节和抗氧化酶活性的影响[J].华北农学报,2018,33(3):176-181.
[14]贾丹莉,杨治平,郭军玲,等.6种玉米品种耐盐性筛选[J].中国农学通报,2017,33(11):1-8.