披碱草内生真菌对三种草坪草种子与种苗的化感效应  

Allelopathic effects of Neotyphodium endophytes of Elymus dahuricus on seeds and seedlings of three turf grass species

作　　者：杨松[1] 李春杰[1] 柴青[1] 黄玺[1] 南志标[1] 

机构地区：[1]农业部草地农业生态系统学重点开放实验室兰州大学草地农业科技学院,甘肃兰州730020

出　　处：《草业学报》2010年第4期33-40,共8页Acta Prataculturae Sinica

基　　金：国家973项目(2007CB108902);国家科技支撑项目(2008BADB3B05);教育部新世纪优秀人才计划(NCET-08-0256);国家自然基金项目(30771531);兰州市科技攻关计划(2008-SY-12);兰州市南北两山指挥部项目(LNLK2009-05;2009KJLQ-03)资助

摘　　要：以多年生黑麦草、高羊茅和草地早熟禾3种草坪草作为供试对象,用种子萌发法和盆栽法初步测定了披碱草内生真菌的化感效应。结果表明,披碱草内生真菌对3种草坪草种子萌发与生长具有一定的影响作用。种子室内滤纸萌发条件下,披碱草草粉对3种草坪草种子萌发有一定的抑制作用;且内生真菌显著增强了披碱草草粉对多年生黑麦草苗重、对高羊茅的发芽率、根长、苗长、苗重和对草地早熟禾发芽率的抑制作用(P<0.05),显著降低了披碱草草粉对多年生黑麦草的根长和苗长、对高羊茅的根重以及对草地早熟禾根长的抑制作用(P<0.05)。盆栽条件下,披碱草草粉对3种草坪草的生长均有一定的促进作用;且内生真菌显著增强了披碱草草粉对高羊茅初期发芽率的促进作用(P<0.05),显著降低了披碱草草粉对多年生黑麦草的初期发芽率和对草地早熟禾苗长的促进作用(P<0.05)。Allelopathic effects of Neotyphodiurn infected Elymus dahuricus were tested on seeds and seedlings of Lolium perenne, Festuca arundinacea, and Poa pratensis found to affect all three grasses. The seed germination experiment showed that extracts from E. dahuricus inhibited seed germination and seedling growth of all three grasses under germination conditions. The Neotyphodium endophyte considerably enhanced the inhibition of E. dahuricus on seed weights of L. perenne, seed germination of P. pratensis and seed germination, root length, seedling length, and seed weight of F. arundinacea （P〈0. 05）. However, the endophyte considerably reduced inhibition of E. dahuricus on root length and seedling length of L. perenne, seedling length of P. pratensis, and seed weight of F. arundinacea （P〈0. 05）. In a pot experiment, extracts from E. dahuricus aecelerated plant growth of all 3 grasses, thus while the Neotyphodium endophyte reduced seed germination of L. perenne, and seed length of P. pratensis （P〈0. 05）, it enhanced the seed germination of F. arundinacea （P〈0. 05）.

关 键 词：内生真菌 化感作用 披碱草 发芽 

分 类 号：S688.4[农业科学—观赏园艺]