李新华+陈巧艳+欧行奇+乔红+王紫娟



摘要:为研究NaCl胁迫对不同小麦(Triticum aestivum L.)品种萌发与幼苗生长的影响,以周麦18、百农207、华育198、矮抗58和百农69为材料,对不同浓度NaCl溶液胁迫下小麦发芽势、发芽率、根长和苗高等耐盐指标进行分析。结果表明,随着NaCl溶液濃度的升高,小麦的发芽势、发芽率、根长和苗高的相对值均明显下降,不同品种间及浓度间均有明显变化;综合5个试验品种的表现可知,百农207和周麦18在苗期表现出较强的耐盐能力,矮抗58、百农69和华育198的耐盐能力依次降低。
关键词:小麦(Triticum aestivum L.)品种;苗期;NaCl胁迫;耐盐指标
中图分类号:S512.1 文献标识码:A 文章编号:0439-8114(2017)17-3222-03
DOI:10.14088/j.cnki.issn0439-8114.2017.17.007
Effects of NaCl Stress on Seed Germination and Seedling Growth of
Different Wheat Varieties
LI Xin-hua, CHEN Qiao-yan, OU Xing-qi, QIAO Hong, WANG Zi-juan
(Henan Institute of Science and Technology, Xinxiang 453003, Henan, China)
Abstract: To study the effects of salt stress on seed germination and seedling growth of different wheat(Triticum aestivum L.)varieties,Zhoumai 18,Bainong 207,Huayu 198,Aikang 58 and Bainong 69 were used as the experimental materials to analyze the differences of four trait indicators under different concentrations of NaCl solution. The results showed that with the concentration of NaCl salt solution increased,the relative values of wheat germination potential,germination rate,root length and seedling height were significantly decreased,there was a significant difference between cultivars and concentrations. The study also indicated that the tested varieties of Bainong 207 and Zhoumai 18 exhibit stronger salt tolerance during the germination stage,the salt tolerance of Aikang 58,Bainong 69 and Huayu 198 were gradually decreased.
Key words: wheat(Triticum aestivum L.) varieties; seedling stage; NaCl stress; salt tolerance indicators
土壤盐渍化是当今世界农业面临的主要非生物胁迫,全世界约有9.6亿hm2盐碱土,而中国有0.2亿hm2以上盐碱地和0.07亿hm2以上的盐渍土壤,约占耕地面积的20%[1]。随着中国人口的剧增及工业的高速发展,以及不合理灌溉、耕作等造成的次生盐渍化也在逐年扩大,导致可耕地面积急剧下降,严重威胁着中国的粮食生产[2,3]。因此,开发利用盐碱地是今后中国农业发展不可回避的问题。盐渍化土壤的开发利用有多种途径,筛选和培育耐盐作物品种,提高作物本身的耐盐能力,对改良利用盐碱地和提高作物产量都具有重要的意义。
小麦(Triticum aestivum L.)是中国的重要农作物之一,由于工业污染和人为因素造成的盐碱地严重影响了小麦产量,研究小麦品种耐盐性对小麦育种和产量的提高有着重要作用[4]。小麦耐盐性是多基因控制的数量遗传性状,涉及诸多基因和多种耐盐机制的协调作用,并且不同品种间存在耐盐性差异[5]。……