湖南农业科学
湖南農業科學
호남농업과학
HUNAN AGRICULTURAL SCIENCES
2015年
6期
31-34
,共4页
周珍%向阳%解娜%易图永
週珍%嚮暘%解娜%易圖永
주진%향양%해나%역도영
黄瓜疫霉菌%16S rDNA%拮抗放线菌%筛选%鉴定
黃瓜疫黴菌%16S rDNA%拮抗放線菌%篩選%鑒定
황과역매균%16S rDNA%길항방선균%사선%감정
Phytophthora m elonis%16S rD N A%antagonistic actinom ycetes%isolation%identification
为更好的防治黄瓜疫病,从湖南、贵州等地采集的土壤样品中分离到放线菌106株,采用平板对峙法及发酵液抑菌试验筛选对黄瓜疫霉菌(Phytophthora melonis)具有拮抗活性的放线菌。结果表明,106株放线菌中有26株对黄瓜疫霉菌有抑制作用,抑菌带达到5 mm 及以上的有5株,其中2号菌株的拮抗作用最明显,发酵液稀释5倍后对黄瓜疫霉菌的菌丝生长抑制率仍达76%。对2号菌株进行培养性状、生理生化特征鉴定及16S rDNA 序列分析,初步将其鉴定为绛红褐链霉菌(Streptomyces purpeofuscus)。
為更好的防治黃瓜疫病,從湖南、貴州等地採集的土壤樣品中分離到放線菌106株,採用平闆對峙法及髮酵液抑菌試驗篩選對黃瓜疫黴菌(Phytophthora melonis)具有拮抗活性的放線菌。結果錶明,106株放線菌中有26株對黃瓜疫黴菌有抑製作用,抑菌帶達到5 mm 及以上的有5株,其中2號菌株的拮抗作用最明顯,髮酵液稀釋5倍後對黃瓜疫黴菌的菌絲生長抑製率仍達76%。對2號菌株進行培養性狀、生理生化特徵鑒定及16S rDNA 序列分析,初步將其鑒定為絳紅褐鏈黴菌(Streptomyces purpeofuscus)。
위경호적방치황과역병,종호남、귀주등지채집적토양양품중분리도방선균106주,채용평판대치법급발효액억균시험사선대황과역매균(Phytophthora melonis)구유길항활성적방선균。결과표명,106주방선균중유26주대황과역매균유억제작용,억균대체도5 mm 급이상적유5주,기중2호균주적길항작용최명현,발효액희석5배후대황과역매균적균사생장억제솔잉체76%。대2호균주진행배양성상、생리생화특정감정급16S rDNA 서렬분석,초보장기감정위강홍갈련매균(Streptomyces purpeofuscus)。
In orderto explore biocontrolagentsto controlcucum berphytophthra blightcaused by Phytophthra m elonis,106 actinom ycetes strains w ere isolated from soilsam ples ofH unan and Guizhou provinces.Then dualculture m ethod and ferm entation broth inhibition test w ere used to screen antagonistic actinom ycete strains to Phytophthora m elonis.The results show ed that26 of 106 actinom ycetes strains could inhibitPhytophthora m elonis,5 ofw hich had an inhibition zone over5 m m in w idth.N o.2 strain had the strongestinhibition activity, w hose inhibition rate rem ained 76% even after the ferm entation broth w as diluted 5 tim es. B ased on the identification of cultivation characters as w ellas physiologicaland biochem icalfeatures,and the analysis of16S rD N A sequence,N o.2 strain could be nom enclatured asStreptom ycespurpeofuscus.