This research aims at developing a plant regeneration system from leaf and petiole explants of Anthurium andraeanum Hort., thereby establish a foundation for mass production and transformation. Using tissue culture te...This research aims at developing a plant regeneration system from leaf and petiole explants of Anthurium andraeanum Hort., thereby establish a foundation for mass production and transformation. Using tissue culture technique, the conditions for callus induction, protocorm-like body （PLB） formation and plant regeneration from leaf explants and petiole of A. andraeanum, such as basal medium and plant growth regulator, were investigated. Totipotent callus was induced on a 1/2-strength MS medium containing 0.90 μmol L^-1 2,4-dichlorophenoxyacetic acid （2,4-D） and 8.88μmol L^-1 N6-benzyladenine （BA）. The callus exhibited complete hormone autonomy for growth and differentiation of PLBs. This callus proliferated well and was maintained by subculturing on 1/2 MS medium containing 0.90 μmol L^-1 2,4-D and 4.44 μmol L^-1 BA. On average, 8 protocorm-like bodies could be obtained from a piece of 4 mm callus after being transferred to the 1/2 MS medium with 4.44 μmol L^-1 BA after 8 wk of culture. The regenerated PLBs formed shoots and roots on 1/2 MS medium. After 24 wk of culture on these medium, well-developed plantlets for potting were produced. An efficient micropropagation method was established for indirect PLB formation and plant regeneration from leaf and petiole ofA. andraeanum.展开更多
以铁皮石斛Dendrobium officinale的茎尖为外植体,在特定条件下诱导产生拟原球茎,进一步培养形成幼苗。结果表明:原球茎最优诱导培养基为1/2MS(Murashige and Skoog)+0.5mg·L-16-苄基嘌呤(6-BA)+0.05mg·L-1萘乙酸(NAA)+0.1mg&...以铁皮石斛Dendrobium officinale的茎尖为外植体,在特定条件下诱导产生拟原球茎,进一步培养形成幼苗。结果表明:原球茎最优诱导培养基为1/2MS(Murashige and Skoog)+0.5mg·L-16-苄基嘌呤(6-BA)+0.05mg·L-1萘乙酸(NAA)+0.1mg·L-1激动素(KT)+1.0g·L-1水解乳蛋白(LH)。复合添加物的试验表明,土豆汁对拟原球茎(PLBs)的增殖有很好的促进作用。对铁皮石斛拟原球茎的解剖学研究表明:拟原球茎是由位于顶端分生组织下的薄壁细胞脱分化形成的胚性细胞发育而来。外植体接种后20d左右外植体基部开始膨大,40d左右出现肉眼可见的乳白色突起,这些突起逐渐增大,成为圆形至卵圆形的乳白色拟原球茎。在条件适宜的拟原球茎增殖培养基上继续培养,拟原球茎边缘的薄壁细胞继续脱分化,进一步发育形成球形的细胞团,可继续形成突起,使拟原球茎不断增殖。展开更多
基金supported by the Natural Science Foundation of Guangdong Province (05300848)Fok Ying Tung Education Foundation (104031)the National Natural Science Foundation of China(30800758)
文摘This research aims at developing a plant regeneration system from leaf and petiole explants of Anthurium andraeanum Hort., thereby establish a foundation for mass production and transformation. Using tissue culture technique, the conditions for callus induction, protocorm-like body （PLB） formation and plant regeneration from leaf explants and petiole of A. andraeanum, such as basal medium and plant growth regulator, were investigated. Totipotent callus was induced on a 1/2-strength MS medium containing 0.90 μmol L^-1 2,4-dichlorophenoxyacetic acid （2,4-D） and 8.88μmol L^-1 N6-benzyladenine （BA）. The callus exhibited complete hormone autonomy for growth and differentiation of PLBs. This callus proliferated well and was maintained by subculturing on 1/2 MS medium containing 0.90 μmol L^-1 2,4-D and 4.44 μmol L^-1 BA. On average, 8 protocorm-like bodies could be obtained from a piece of 4 mm callus after being transferred to the 1/2 MS medium with 4.44 μmol L^-1 BA after 8 wk of culture. The regenerated PLBs formed shoots and roots on 1/2 MS medium. After 24 wk of culture on these medium, well-developed plantlets for potting were produced. An efficient micropropagation method was established for indirect PLB formation and plant regeneration from leaf and petiole ofA. andraeanum.
文摘以铁皮石斛Dendrobium officinale的茎尖为外植体,在特定条件下诱导产生拟原球茎,进一步培养形成幼苗。结果表明:原球茎最优诱导培养基为1/2MS(Murashige and Skoog)+0.5mg·L-16-苄基嘌呤(6-BA)+0.05mg·L-1萘乙酸(NAA)+0.1mg·L-1激动素(KT)+1.0g·L-1水解乳蛋白(LH)。复合添加物的试验表明,土豆汁对拟原球茎(PLBs)的增殖有很好的促进作用。对铁皮石斛拟原球茎的解剖学研究表明:拟原球茎是由位于顶端分生组织下的薄壁细胞脱分化形成的胚性细胞发育而来。外植体接种后20d左右外植体基部开始膨大,40d左右出现肉眼可见的乳白色突起,这些突起逐渐增大,成为圆形至卵圆形的乳白色拟原球茎。在条件适宜的拟原球茎增殖培养基上继续培养,拟原球茎边缘的薄壁细胞继续脱分化,进一步发育形成球形的细胞团,可继续形成突起,使拟原球茎不断增殖。
