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草业科学  2014 

丛枝菌根真菌对两种草坪草耐盐性的影响

DOI: 10.11829\j.issn.1001-0629.2013-0031, PP. 1261-1268

Keywords: 丛枝菌根真菌,草坪草,盐胁迫,耐盐系数

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Abstract:

?以高羊茅(Festucaarundinacea)和草地早熟禾(Poaparatensis)两种冷季型草坪草为材料,选用广谱型菌种Funneliformismosseae和Rhizophagusintraradices,采用盆栽的试验方法,研究丛枝菌根(ArbuscularMycorrhizae,AM)真菌对盐胁迫下(0、0.8%、1.2%和1.6%NaCl)草坪草的生长和生理的影响。结果表明,随着盐浓度的增加,AM真菌对草坪草的侵染率显著降低(P<0.05),且接种AM真菌草坪草的菌根依赖性、生物量、叶绿素含量、耐盐系数和草坪外观品质也呈降低趋势。在NaCl胁迫下,接种AM真菌能明显促进高羊茅和草地早熟禾的生长,提高叶片中叶绿素的相对含量、耐盐系数和草坪外观品质,增加耐盐性。但不同的AM真菌对草坪草的侵染率以及促进效果不同,接种AM真菌混合菌种的效果优于接种单一AM真菌,且接种F.mosseae的效果优于接种R.intraradices的处理。

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