内蒙古农业科技
內矇古農業科技
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INNER MONGOLIA AGRICULTURAL SCIENCE AND TECHNOLOGY
2014年
4期
6-9,81
,共5页
巩瑞红%王小兵%赵吉睿%张胜男%王瑞刚%孟建宇
鞏瑞紅%王小兵%趙吉睿%張勝男%王瑞剛%孟建宇
공서홍%왕소병%조길예%장성남%왕서강%맹건우
根际促生菌%溶磷细菌%荒漠草原%分离鉴定
根際促生菌%溶燐細菌%荒漠草原%分離鑒定
근제촉생균%용린세균%황막초원%분리감정
Plant growth-promoting bacteria%Phosphate-solubilizing bacteria%Desert steppe%Isolation and identification
溶磷细菌是主要的根际促生菌的类群之一,其在发展绿色农业和荒漠化防治中具有重要作用。已有的相关研究主要集中于农作物等,而对于荒漠草原植物溶磷细菌的研究尚很缺乏。该研究利用涂布划线方法、以无机磷培养基从四子王旗荒漠草原四种优势植物根际土壤中分离溶磷细菌,采用过硫酸钾消解-钼锑抗比色法检测菌株的溶磷能力。从4种优势植物兔唇冬青草、银灰旋花、蒙古黄芪和短花针茅根际土壤共分离得到42株溶磷细菌,归为五个类群19个属。其中19株(45.2%)属于放线菌纲(Actinobacteria),5株(11.9%)属于芽孢杆菌纲(Bacilli),16株(38.1%)属于α-变形菌纲(α-proteobacteria),1株(2.4%)属于β-变形菌纲(β-proteobacteria),1株(2.4%)属于γ-变形菌纲(γ-proteobacteria)。溶磷能力测定结果表明菌株GP0501、GP0506、GP0507和GP0509在42株菌种中溶磷能力最强,溶磷量分别为77.57、65.89、58.08、68.02μg/mL,都属于芽孢杆菌属(Bacillus),具有较大的应用潜力。
溶燐細菌是主要的根際促生菌的類群之一,其在髮展綠色農業和荒漠化防治中具有重要作用。已有的相關研究主要集中于農作物等,而對于荒漠草原植物溶燐細菌的研究尚很缺乏。該研究利用塗佈劃線方法、以無機燐培養基從四子王旂荒漠草原四種優勢植物根際土壤中分離溶燐細菌,採用過硫痠鉀消解-鉬銻抗比色法檢測菌株的溶燐能力。從4種優勢植物兔脣鼕青草、銀灰鏇花、矇古黃芪和短花針茅根際土壤共分離得到42株溶燐細菌,歸為五箇類群19箇屬。其中19株(45.2%)屬于放線菌綱(Actinobacteria),5株(11.9%)屬于芽孢桿菌綱(Bacilli),16株(38.1%)屬于α-變形菌綱(α-proteobacteria),1株(2.4%)屬于β-變形菌綱(β-proteobacteria),1株(2.4%)屬于γ-變形菌綱(γ-proteobacteria)。溶燐能力測定結果錶明菌株GP0501、GP0506、GP0507和GP0509在42株菌種中溶燐能力最彊,溶燐量分彆為77.57、65.89、58.08、68.02μg/mL,都屬于芽孢桿菌屬(Bacillus),具有較大的應用潛力。
용린세균시주요적근제촉생균적류군지일,기재발전록색농업화황막화방치중구유중요작용。이유적상관연구주요집중우농작물등,이대우황막초원식물용린세균적연구상흔결핍。해연구이용도포화선방법、이무궤린배양기종사자왕기황막초원사충우세식물근제토양중분리용린세균,채용과류산갑소해-목제항비색법검측균주적용린능력。종4충우세식물토진동청초、은회선화、몽고황기화단화침모근제토양공분리득도42주용린세균,귀위오개류군19개속。기중19주(45.2%)속우방선균강(Actinobacteria),5주(11.9%)속우아포간균강(Bacilli),16주(38.1%)속우α-변형균강(α-proteobacteria),1주(2.4%)속우β-변형균강(β-proteobacteria),1주(2.4%)속우γ-변형균강(γ-proteobacteria)。용린능력측정결과표명균주GP0501、GP0506、GP0507화GP0509재42주균충중용린능력최강,용린량분별위77.57、65.89、58.08、68.02μg/mL,도속우아포간균속(Bacillus),구유교대적응용잠력。
As one of the major groups of plant growth-promoting bacteria,phosphate-solubilizing bacteria play an important role in the development of green agriculture and control of desertification.The present research mainly focus on phosphate - solubilizing bacteria of farmland,classic grassland and desert ecosystem,however plant growth-promoting rhizobacteria of desert steppe has rarely been studied.The phosphate-solubilizing bacteria were isolated by the insoluble phosphate medium, and the phosphate-solubilizing ability of the isolates were detected by the potassium persulfate digestion and Mo-Sb anti colorimetric method.42 phosphate -solubilizing bacteria were isolated from the rhizosphere of four dominant plants in desert steppe of Siziwang Banner.The 42 strains were classified into 5 groups and 19 genuses.Among them,19 isolates (45.2%) belong to the Actinobacteria,5 strains (11.9%) belong to the Bacilli,16 strains (38.1%) belong to α-proteobacteria,1 strain (2.4%) belong to β- proteobacteria,and 1 strain (2.4%) belong to γ -proteobacteria.The results showed that strain GP0501,GP0506,GP0507 and GP0509 have the strongest phosphate solubilizing ability,the phosphate solubilization capacity was 77.57,65.89,58.08,68.02g/μ mL,respectively.The 4 strains have great potential of application,which all belong to Bacillus.