食用仙人掌离体培养再生植株

以食用仙人掌来邦塔（Milpa alta)茎片切块为外植体，接种于含6－BA2.5mg/L,NAA0.5mg/L,糖30g/L，琼脂粉3.2g／L的MS培养基上，50天诱导产生5－6个粗壮，生长正常的芽，在含有IBA1mg/L的1／2MS培养基上，小芽生长12天开始出现根点，20天后根系长至0.3-0.5cm，生根率达100％，移截于经0.5%用醛溶液消毒的至石，山土，珍珠岩混合基质里，成活率80％，生长健壮。     

巨桉组培育苗技术研究

以巨桉成龄树基部萌芽条的茎段为外植体,通过3种基本培养基和9种生长调节剂不同浓度组合的对比试验,筛选出MS＋6-BA0．4mg／L＋NAA0．2mg／L为诱导培养基,改良MS＋6-BA0．5mg／L＋NAA0．3mg／L为继代培养基,B2＋ABT1号生根粉0．8mg／L为生根培养基。应用这些配方进行巨桉组培,芽增殖数达3．26倍,瓶苗生根率达98％,移植成活率90％以上,达到了工厂化苗木生产的要求。     

白芨的离体培养

为快速生产大量优质白芨种苗,以白芨种子为外植体进行离体快繁研究。结果表明:MS基本培养基可促进白芨种子的快速无菌萌发,当6-BA的浓度为1.0 mg/L时可以促进幼苗的快速分裂生长,添加了2 mg/L的2,4-D的培养基可有效促进愈伤组织的形成。种子苗原球茎经切割后在MS+2 mg/L 2,4-D+0.5 mg/L6-BA的培养基上愈伤组织诱导率为85%,1.0 mg/L的6-BA和0.15 mg/L的NAA配比可以诱导丛生芽的生长和增殖,添加了70 g/L香蕉泥和0.5 mg/L NAA的1/2MS培养基可有效促进根的生长。无菌发芽的种子苗移栽率可以达90%,而试管苗移栽的成活率较低,但随离体培养时间的延长有所提高。     

圆山药的离体培养

为建立圆山药的离体培养体系,将野生苗盆栽后,切取其嫩叶、茎段、地下块茎和不定根作为外植体,探讨不同消毒方式的影响及不同生长调节剂组合对愈伤组织诱导、愈伤组织分化、不定芽诱导及腋芽增殖的影响。结果表明:①腋芽增殖途径的培养基配方为MS+BA3.0 mg/L+NAA 0.2 mg/L(增殖系数为3.1);②适宜的愈伤组织诱导培养基为MS+2,4—D 4 mg/L+6—BA 0.5 mg/L,其中以带腋芽的茎段为外植体诱导率较高,可达85.7%。BA浓度为4.0~6.0 mg/L时,不定芽的形成率最高,达97.5%;③增加BA和琼脂的浓度利于防止圆山药的褐化。     

龙牙楤木的离体培养

用龙牙楤木(Aralia mandshrica)的顶芽为外植体进行培养,以MS培养基为基础,加入6-BA、2,4-D、IAA等细胞分裂素和生长素,对龙牙楤木顶芽进行诱导,分化及生根培养,从而获得试管苗。     

In vitro cytotoxicity of 11 Panamanian plants

Thirty-five crude extracts from 11 Panamanian plants, distributed in 10 genera and five families, were evaluated for their in vitro cytotoxicity. Four extracts exhibited an inhibition of cellular growth at IC(50) values lower than 25 microg/ml which was considered a significant activity.     

辣木种苗组培快繁技术研究

对辣木的组织培养和种苗移栽管理技术进行研究,结果表明:适宜辣木的腋芽生长培养基为MS+1.0 mg/L IBA+0.5 mg/L6-BA,生根培养基为MS+1.5~2.0 mg/L IBA,添加0.5 g/L活性炭。辣木组培苗移栽时应控制空气湿度90%。     

文心兰茎尖离体培养研究

文心兰茎尖培养的研究，试验结果表明：文心兰茎尖在MS BA2mg／L NAA0．5mg／L培养基上，离体培养1个月后产生原球茎．改良KC基本培养较适原球茎的增殖；用BAI．5mg／L NAA0．2mg／L的激素配比，原球茎月增殖宰可达332．5％；CW可以减少原球茎褐死现象和促进原球茎的增殖：壮苗阶段，以附加NAA0．5% 10％香蕉汁的效果较好．水苔是良好的移栽基质，成活率在85．3％．     

核桃试管苗生根培养的研究

以新疆绵核桃为试材,对继代培养无根试管苗的生根进行了研究.结果表明：生根诱导方法、外源IBA水平及IBA处理时间、光周期以及试管苗发育状态等均对不定根发生具有明显影响.选取生长旺盛、节间较长,叶片嫩绿的幼态苗,采用间接诱导生根法,即用50～80 mg/L IBA浸渍处理试管苗基部60～90 min,然后转至不含生长调节物质的1/2 DKW培养基,先黑暗诱导14 d,再在16 h/d光照下培养,可诱导试管苗生根率达60%以上.     

平榛离体培养技术的研究

对平榛外植体不同取材时期和外植体种类对初代培养的影响及增殖培养阶段不同激素对增殖生长的影响进行研究.结果表明:外植体种类与取材时间是平榛离体培养的关键,最佳外植体为休眠过后室内萌发的嫩梢顶芽,其污染率低,萌芽率可达83.33%;适宜平榛离体培养的基本培养基为DKW培养基;芽分化阶段较好的培养基为DKW+TDZ 1.0mg/L+IBA 0.01mg/L+GA0.2mg/L;继代增殖培养阶段,细胞分裂素TDZ和生长素IBA的组合最有利于芽的增殖生长,其最适浓度分别为0.5mg/L和0.1mg/L,增殖倍数为3.2.     

光皮树的组织培养研究初探

以光皮树种子和嫩枝条为材料,探讨不同诱导途径对培养的影响:①分别以茎段、顶芽、叶片、带腋芽的茎段及无菌发芽的种子苗上的胚轴和子叶为外植体离体诱导出愈伤组织,然后再进行分化;②以带腋芽的茎段为外植体进行腋芽增殖.结果表明:70％酒精与0.1％升汞配合使用,消毒效果较好.其中,茎段消毒采用70％酒精浸泡30 s,0.1％升...     

菲油果离体快繁再生无菌植株研究

为给菲油果离体快繁工厂化生产提供科学依据,分别以当年生菲油果嫩枝和无菌种子发芽的带芽茎段为外植体,在启动、增殖、生根等培养阶段以MS或1/2 MS为基本培养基,采用不同浓度的6-BA和IBA进行试验,筛选了适用于离体快繁的培养基组合。结果表明:无菌种子发芽的带芽茎段较容易离体快繁,且其增殖指数高达2.3;最适的启动培养基组合为MS+6-BA 0.5 mg/L,增殖壮苗培养基组合为MS+6-BA 0.2 mg/L+IBA 0.2 mg/L,生根培养基组合为1/2MS+IBA 0.5 mg/L。     

枣树胚离体培养的研究

本文对影响枣树胚离体培养的三个因素：取材时期，激素配方，及光照条件进行了研究，结果表明：发育早期较为幼嫩的胚，主要的培养产物是绿色或黄色的愈伤组织及胚状体，不能直接发育为小植株，成熟胚萌发率较高，添加外源激素起抑制作用。不能诱导产生愈伤组织及胚状体，光照可以明显的诱导胚萌发，而且这种诱导作用主要在培养的初期。     

In vitro and ex vitro rooting of micropropagated shoots using three green ash (Fraxinus pennsylvanica) clones

Shoot multiplication using seedling materials was achieved by subculture on Murashige and Skoog salts with Gamborg's B5 vitamins (MSB5) medium containing a combination of 5 M 6-benzyladenine (BA), 5 M thidiazuron (TDZ), and 1 M indole-3-butyric acid (IBA) with three green ash (Fraxinus pennsylvanica) clones, SD1009 (South Dakota origin), SD2002 (South Dakota origin), and KA2018 (Kansas origin). Shoots were rooted using in vitro and ex vitro methods. For in vitro rooting studies, elongated shoots were transferred to rooting plugs supplied with liquid MSB5 medium containing a 3×3 factorial arrangement of two different auxins, -naphthaleneacetic acid (NAA) and IBA, at three concentrations (0, 5, and 10 M). The most effective treatment for in vitro root number, root length, and shoot height was 5 M IBA. The three clones also were tested for ex vitro rooting using a quick dip in 1 mM NAA, 1 mM IBA, or control (no auxin). The maximal ex vitro rooting response occurred when shoot explants of the three clones were dipped in 1 mM IBA. Significant clonal differences were noted in response to in vitro and ex vitro rooting treatments. Rooted plantlets were acclimated to the greenhouse.     

2种百合科植物离体鳞茎诱导

以大百合(Cardiocrinum giganteum)和龙牙百合(Lilium brownii)作为实验材料,采用组织培养技术,研究不同鳞片部位、激素组合和培养基类型对其鳞茎诱导的影响,以探究2种植物最佳的鳞茎诱导方案。结果表明:大百合作为外植体的最佳材料来源为中层鳞片的近鳞茎盘部位,最佳诱导培养基为:MS+BA 5.0mg/L+NAA 0.1 mg/L+ZT 0.08 mg/L;龙牙百合作为外植体的最佳材料来源为中层鳞片,最佳诱导培养基为改良MS+BA 3.0 mg/L+NAA 0.2 mg/L+ZT 0.01 mg/L。     

Antileishmanial activity of aqueous onion extract in vitro

Onion has had an important dietary and medicinal role for centuries. In this study the antileishmanial effect of aqueous onion extract (AOE) was investigated. Five leishmanial strains in the promastigote stage were studied in vitro. Seventy-two hour inoculation of AOE gave an IC100 and average IC50 values of 1.25 mg/ml and 0.376 mg/ml, respectively, against all leishmanial strains tested.     

In vitro regeneration of Populus tomentosa from petioles

A reliable in vitro regeneration procedure for Populus tomentosa is a prerequisite for its trait improvement through genetic transformation. We established a systematic protocol for indirect regeneration of P. tomentosa using in vitro petioles of Chinese poplar cultivar ‘fasta-3'. A high frequency of callus induction([97 %) was obtained from isolated petioles cultured on the modified 1/2MS basal medium supplemented with 0.5 mg/L ZT and 1.0 mg/L NAA, and the tested calli were subsequently plated on1/2MS basal medium supplemented with 0.25 mg/L BA,0.25 mg/L ZT, 0.25 mg/L NAA, 0.01 mg/L TDZ, and0.5 mg/L KT for efficient regeneration of shoots after being cultured for 6 weeks. The regenerated shoots were vigorously rooted on the tested media supplemented with 1.0 mg/L IBA and 0.5 mg/L NAA. These results can facilitate genetic transformation of P. tomentosa for trait improvements in future.     

秋海棠属植物离体培养的研究进展

该文从外植体的选择、再生途径、基本培养基和激素的种类等 4个方面 ,分别对秋海棠属植物的离体培养、器官发生进行了论述 ,并对该属植物离体培养的发展、研究动向 ,阐述了自己的观点     

In vitro propagation of conifers using mature shoots

Micropropagation mostly leads to the production of innumerable true-to-type plants. However, establishing pathogen-free explants through in vitro culture requires a precise management of time for the exposure of explants to antimicrobial chemicals. The application of antimicrobial chemicals must also be managed to impose the least injury on explants. This review discusses the contributions of micropropagation procedures, explant types, subculture duration, media ingredients and plant growth regulators to the in vitro response of conifer explants. Even though regeneration from mature conifer explants such as mature shoots are laborious, the chances of variation, induced in vitro, are unlikely.