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盐旱交叉胁迫对各施氮水平下小麦苗期的影响
文 佩1, 陈小兵1, 张乐乐2, 李依霖2, 齐铭君3, 姜姝璇3, 张立宾4
1.中国科学院海岸带环境过程与生态修复重点实验室;2.烟台大学环境与材料工程学院;3.中国农业大学(烟台)理工院;4.东营市科技情报研究所
摘要:
为探究不同浓度盐胁迫和水分胁迫及两者互作对小麦幼苗生理特性的影响,于2017年3月至5月布置盆栽试验, 分别设置两个NaCl胁迫(S1,NaCl 1.9 g/kg;S2,NaCl 2.9 g/kg)和两个水分处理水平(W1,78% 田间持水量;W2,47% 田间持水量),测定了冬小麦幼苗地上部和地下部干物质量、全氮、叶绿素和可溶性糖含量。结果表明:①在本试验盐胁迫范围内,单一盐胁迫下盐分含量的上升会显著抑制小麦的生长,冬小麦各部分干重、全氮、叶绿素含量明显下降,渗透物质可溶性糖含量会上升;②低盐干旱胁迫互作改善冬小麦幼苗生长状况,叶绿素含量、各部分干物质累积、氮积累量以及可溶性糖含量最大,呈现出对盐旱复合胁迫的适应性;③高盐干旱胁迫互作会加剧对小麦幼苗的生长限制。因此,低盐胁迫下对冬小麦进行适度的干旱刺激可以促进小麦幼苗适应复合胁迫,有利于小麦幼苗生长。
关键词:  盐胁迫  干旱  盐旱复合胁迫  冬小麦幼苗
DOI:10.13758/j.cnki.tr.2019.02.016
分类号:S512.1+1
基金项目:山东省重点研发计划项目(2017CXGC0316,2016CYJS05A01-1)、NSFC-山东联合基金重点支持项目(U1806215)和东营市重点研发计划项目(2016YF17)资助。
Effects of Salt and Drought on Winter Wheat in Seedling Stage Under Different Nitrogen Rates
WEN Pei1, CHEN Xiaobing1, ZHANG Lele2, LI Yilin2, QI Mingjun3, JIANG Shuxuan3, ZHANG Libin4
1.Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation, Chinese Academy of Sciences;2.School of Environment and Material Engineering Yantai University;3.School of Polytechnic China Agricultural University (Yantai);4.Dongying Institute of Scientific and Technical Information
Abstract:
To investigate the physiological and biochemical characteristics of wheat seedlings under salinity and drought, an indoor pot experiment was conducted from March to May in 2017. Two NaCl concentrations of S1 and S2, two water contents of W1 and W2 were designed. The dry weights and the contents of total nitrogen, chlorophyll and soluble sugar of shoots and roots were measured for potted winter wheat. The results showed that: ① The increase of salinity significantly limited the growth of wheat. The dry weights of shoots and roots, total nitrogen and chlorophyll contents of winter wheat decreased significantly but the soluble sugar content increased. ② Interaction of low salt with drought alleviated the restriction on the growth of wheat seedlings, the dry weights of shoots and roots and the contents of nitrogen, chlorophyll and soluble sugar of winter wheat were highest. ③ Interaction of high salinity with drought aggravated the restriction on the growth of wheat seedlings. The above results suggest that low salinity with moderate drought stress could stimulate stress effects of wheat, which is beneficial for the growth of wheat seedling.
Key words:  Salt stress  Drought  Salt drought stress  Wheat seedling

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