五叶地锦离体培养及植株再生
In vitro Culture and Plant Regenera tion of Pa rthenoc issus qu inquefolia
-
摘要: 以五叶地锦( Parthenocissus quinquefolia)子叶柄、下胚轴、叶片为外植体进行离体培养,以1 /2 MS、B5和Heller为基本培养基,附加不同浓度的细胞分裂素(62BA, KT, TDZ)及生长素(NAA)诱导下胚轴直接再生不定芽。实验结果表明,暗处理30 d,靠近下胚轴的子叶柄接种在1 /2MS + 0. 3 mg·L -1 62BA培养基上,其不定芽分化率最高达64. 67%;下胚轴接种在1 /2MS + 2. 0 mg·L -1 KT + 0. 05 mg·L -1NAA和Heller + 0. 5 mg·L -1BA + 0. 1 mg·L -1NAA培养基上,其不定芽分化率接近,达到24%左右;无菌苗的叶片接种在B5 + 0. 5 mg·L -1 TDZ + 0. 05 mg·L -1NAA培养基上,其不定芽分化率达17. 7%。芽增殖培养基为1 /2MS + 0. 5 mg·L -1 62BA + 0. 1 mg·L -1NAA增殖系数为3~5, 1 /2MS + 0. 5 mg·L -1 IBA + 500 mg·L -1活性炭适于再生幼苗的生根,生根苗经移栽全部成活。Abstract: Adventitious shootswere successfully regenerated from cotyledon petioles, hypocotyl exp lants and leaf ex2p lants of in vitro cultures of Parthenocissus quinquefolia. They were cultured on half strengthMurashine and Skoog(MS) , B5 and Heller basalmedium supp lemented with various p lant growth regulators. Auxins, α2naphthaleneace2tic acid (NAA) and in combination with three cytokinins, benzylaminopurine (BA) , kinetin (KT) and thidiazuron( TDZ) were tried. The study showed that the highest regeneration rate were obtained by cotyledon petioles segmentsnear to the hypocotyl under dark time of 30 days cultured on half strengthMS basalmedium supp lemented with 0. 3mg·L -1BA (64. 67%) , hypocotyl exp lants cultured on half strengthMS basalmedium supp lemented with 2. 0 mg·L - 1 KT and 0. 05 mg·L -1NAA and Heller basalmedium supp lemented with 0. 5 mg·L -1BA and 0. 1 mg·L -1NAA ( both about 24% ). Leaf exp lants cultured on B5 basal medium supp lemented with 0. 5 mg·L -1 TDZ and0105 mg·L -1 NAA, the differentiation rate of adventitious budswas as high as 17. 7%. Using half strengthMS asthe multip lication medium for buds supp lemented with 0. 5 mg·L -1 62BA and 0. 1 mg·L -1 NAA, the multip lica2tion coefficient was 3 - 5. Half strengthMS and 0. 5 mg·L -1 IBA and 500 mg·L -1 activated carbon was suitablefor the rooting of regenerated p lantlets, and nearly 100% of these p lantlets survived after transp lanted.
下载: