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1、廣西農(nóng)業(yè)科學(xué)2010,41(8):758—761GuangxiA鰣culturMSciences山薯組培苗繼代培養(yǎng)基配方篩選嚴(yán)華兵h,龔明霞·b,董偉清h,1-朝陽la)閉志強(qiáng)h,李楊瑞1(1廣西農(nóng)業(yè)科學(xué)院a生物技術(shù)研究所;b蔬菜研究所,南寧530007)摘要:以山薯組培苗帶腋芽莖段為外植體,以Ms為基本培養(yǎng)基,探討植物生長調(diào)節(jié)劑6—8A(0.5、1.0、2.0rag/L)或TDZ(0.01、0.10、0.50、1.00、2.00、4.00mg/L)、不同培養(yǎng)方式和活性炭對其繼代培養(yǎng)的影響。結(jié)果表明,添加不同濃度6一BA對山薯組培苗增殖系數(shù)、莖長及腋芽點(diǎn)芽球
2、的影響不明顯,而隨著TDZ濃度的升高,山薯組培苗增殖系數(shù)和莖長逐漸降低而芽球顯著增加,莖段腋芽生長受到明顯抑制。山薯組培苗較優(yōu)的繼代培養(yǎng)基為MS+I.0mg/L6-BA+0.1mg/LNAA+30g/L蔗糖+1.5g/L活性炭的液體培養(yǎng)基。液體培養(yǎng)基利于促進(jìn)山薯組培苗增殖。其增殖系數(shù)、莖長、植株鮮重和干重顯著高于固體培養(yǎng)基?;钚蕴康奶砑涌梢詼p少褐化,促進(jìn)組培苗的增殖培養(yǎng)。此外,培養(yǎng)方式與活性炭交互作用對組培苗莖長、增殖系數(shù)、植株鮮重及干重?zé)o顯著影響。關(guān)鍵詞:山薯;繼代培養(yǎng);增殖系數(shù);固體培養(yǎng);液體培養(yǎng);活性炭中圖分類號:$632.103".53文獻(xiàn)標(biāo)識碼:A
3、文章編號:1002—8161(2010)08-0758-04Screeningthesubcultlmediumfor’—、?!甪ordiiPrl"etscreeningthesubculturemedluretorDioscoreatbrdlJPrainetBurkplantletsrANHua-bingh,GONGMing-xia¨,DONGWei-qingh,BUZhao-yangh,BIZhi-qian91a9LIYang—rui1(aBiotechnologyResearchInstitute;bVegetableResearchInstitute
4、,lGuangxiAcademyofA畫culturalSciences,Nanning530007,China)Abstract:TheshootswithaxillarybudsderivedfromD.fordii(Guihuai21plantletswereusedasexplantstoinvesti.gatetheeffectsofdifferentplantgrowthregulators,沱.,6一BA(0.5,1.0and2.0mg/LandTDZ(0.01,0.10,0.50,1.oo,2.00and4.00mg/L)inMSmedium
5、,culturemedia(solidorliquid)andactivatedcarbon(AC)onsubcuhureofplantlets.There.suitsshowedthat1.0metE6一BAsupplementedinMSbasalmediumhadnosignificanteffectsonproliferationcoefbcient.stemlengthandgemmulesderivedfromaxillarybuds.WiththeincreaseinTDZconcentrationinMSmedium.theprolifer-
6、ationcoefficient,stemlengthofproliferatedplantletsandgrowthofaxillarybudsinhibitedsignificantly,whilenumberofgemmuleincreased.1heliquidMSmedium+1.0mg/L6-BA+0.1mg/LNAA+30.0g/LSugar+1.5g/LACwasfoundtobet11ebestmediumforshootproliferation.Comparedtosemi—solidculture.theliquidculturepr
7、omotedshootproliferationsig-nificantly,proliferationcoefficient,stemlengthandfreshweiIghtanddryweightofsubcultureplantletswerealsofoundhigher.AdditionofACinMSmediumreducedthebrowningofexplantsandpromotedtheshootproliferation.Furthermore。theinteractionbetweenculturetypeandACinMSmedi
8、umhadnosignificanteffectso