摘要
经形态学鉴定和rDNAITS序列分析,16株分离自北京、河北、河南发病狗尾草的菌株、2株分别分离自河南发病虎尾草、牛筋草的菌株和1株分离自青海发病野燕麦的菌株被鉴定为狗尾草平脐蠕孢Bipolaris setariae。接种试验表明,来自狗尾草的菌株比来自其他寄主植物的菌株对狗尾草致病性强,分离自野燕麦的菌株对狗尾草无致病性,分离自不同地区不同样品狗尾草的菌株其致病性有显著差异。菌株NY1对狗尾草有很强致病性,接种后5d植株叶片即全部呈枯死状,接种后7d整个植株枯萎死亡。菌株NY1对马唐和虎尾草也有很强致病性,但对于大多数供试栽培植物致病性很弱或无致病性。因此,B.setariae NY1菌株具有进一步开发成为狗尾草、马唐和虎尾草等杂草的生物除草剂的潜力。
Based on morphological characteristics and sequence alignment analysis of rDNA ITS region,16 strains isolated from diseased plants of Setaria viridis from Beijing,Hebei and Henan,two strains isolated from diseased plants of Chloris virgata and Eleusine indica from Henan,and one strain isolated from diseased plant of Avena fatua from Qinghai,were identified as Bipolaris setariae.Artificial inoculation tests indicated that the strains from S.viridis had stronger pathogenicity than those from other hosts to S.viridis.The strain from A.fatua had no pathogenicity to S.viridis.The strains with different origins showed difference in virulence to S.viridis.The strain NY1 was strongly pathogenic to S.viridis.All the leaves blighted in 5 days after inoculation,and the whole plants died in 7 days.NY1 was also strongly pathogenic to the weeds C.virgata and Digitaria sanguinalis but had light or no pathogenicity to most crops.The B.setariae NY1 strain is potential to be developed as a microbial herbicide to the weeds S.viridis,C.virgata and D.sanguinalis.
出处
《菌物学报》
CAS
CSCD
北大核心
2010年第2期172-177,共6页
Mycosystema
基金
国家自然科学基金(No30600010)
