共查询到19条相似文献,搜索用时 78 毫秒
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为了避免连续继代造成仙客来愈伤组织的变异, 对仙客来愈伤组织进行了超低温冷冻保存研究。以继代后处于对数生长期的愈伤组织为实验材料, 首先在含有不同蔗糖浓度的培养基上预培养不同时间, 转至不同的冰冻保护剂中直接液氮冷冻或-20oC预冷冻2 h, 然后液氮超冷冻保存, 37oC水浴迅速解冻, 并用相应蔗糖浓度的液体培养基洗涤, 以中性红染色测定细胞的存活率, SPSS13.0软件进行统计学分析。结果表明: 预培养基中蔗糖浓度、预培养时间、降温方式、冷冻保护剂等对解冻后材料相对存活率存在不同程度的影响, 筛选出4%蔗糖浓度预培养3 d、9号保护剂、0oC停留30 min后直接冷冻为超低温保存的最佳方案, 通过简单的方法获得了较好的愈伤组织保存效果。 相似文献
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凹叶厚朴愈伤组织的超低温保存 总被引:14,自引:0,他引:14
采用单因子比较和均匀设计法。研究凹叶厚朴愈伤组织超低温的影响因素。结果表明:超低温保存的适宜材料是4周龄的愈伤组织。经4-6℃低温下预培养12天的愈伤组织抗冻能力最强。 相似文献
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唐菖蒲愈伤组织超低温保存(简报) 总被引:2,自引:0,他引:2
唐菖蒲愈伤组织在培养了 20~25天后为最佳冷冻材料,通过含5% DMSO的培养基预培养5天和10% DMSO 10%甘油的冷冻保护剂处理。都能显著提高冷冻后愈伤组织的存活率,而且分步冷冻较快速冷冻效果更好。经过冷冻后的愈伤组织成功地得到增殖和植株再生。 相似文献
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红豆杉愈伤组织超代温保存有关因素的研究 总被引:1,自引:0,他引:1
对红豆杉愈伤组织超低温保存中几个主要因素进行了比较,试验证明:预培养时间、预培养其中蔗糖浓度、保护剂的组合以及冰冻降温方法与超低温保存后的相以细胞活力密切相关。试验结果表明,在含8%蔗糖的62号液体培养基中振荡预培养6d,红豆杉愈伤组织在超低温保存后细胞活力保持最高。有效的冷冻保护剂为10%山梨醇+10%DMSO,冷冻方法以分步冷冻和慢冻较为适宜,而经快冻的愈伤组织复苏后活力低下。 相似文献
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为避免连续继代造成的愈伤组织变异,探索新的种质资源保存方法,对防风愈伤组织进行了超低温冷冻保存及植株再生研究。以关防风3周龄的愈伤组织为材料,单一变量法研究适宜的玻璃化法超低温保存程序。结果显示:(1)防风愈伤组织超低温保存的最佳方案为:4℃条件下于MS+1.0mg/L 6-BA+1.0mg/L NAA+5%DMSO的继代培养基中预培养3d,60%PVS2常温装载20min,100%PVS2于2℃脱水45min后直接投入液氮。(2)防风愈伤组织经超低温保存后的相对存活率最高为79.24%,其中预培养和脱水是实现超低温冻存的关键环节,且1.0mol/L蔗糖的MS溶液洗涤、暗培养14d以上有助于冻后愈伤组织恢复生长。研究表明,玻璃化超低温冻存可以作为防风愈伤组织的保存方法,冻后愈伤可以恢复生长并再生成完整植株。 相似文献
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探索江西铅山红芽芋胚性愈伤组织的小滴玻璃化法超低温保存;为其种质资源的超低温保存提供技术基础和理论依据。植物组织培养和单因子试验的方法。江西铅山红芽芋胚性愈伤组织小滴玻璃化法超低温保存的较佳程序为:约0.2 g胚性愈伤组织在25℃下转入MS+2 mg·L-1 TDZ+1 mg·L-1 NAA+0.5 mmol·L-1蔗糖的培养基中;于14 h·d-1光周期下预培养3 d后用MS+2 mmol·L-1甘油+0.4 mmol·L-1蔗糖在25℃下装载20 min;然后用PVS2在0℃下脱水40 min;吸取5滴PVS2到铝箔条上;将脱水后的红芽芋胚性愈伤组织块转到铝箔条上的PVS2液滴里。附有胚性愈伤组织块的铝箔条在液氮里蘸一下;然后迅速将其转入2 mL装满液氮的冷冻管中;再投入液氮保存1 d。从液氮中取出冷冻管中的铝箔条;浸入用40℃温水预热过的洗涤液(MS+2 mg·L-1 TDZ+1 mg·L-1 NAA+1.2 mmol·L-1蔗糖)中;使胚性愈伤组织块从铝箔条上脱落下来;然后再将胚性愈伤组织块转入新鲜的洗涤液中洗涤3次;每次10 min。洗涤后转入MS+2 mg·L-1 TDZ+1 mg·L-1 NAA固体培养基上;先暗培养7 d再转到14 h·d-1光周期中培养。30 d后将分化出的胚状体再次转入MS+2 mg·L-1 TDZ+1 mg·L-1 NAA固体培养基上可再生完整植株。红芽芋胚性愈伤组织包埋玻璃化超低温保存后的平均成活率约为80%。红芽芋胚性愈伤组织冻后再生苗没有发生形态学、生理学和细胞学的变异。红芽芋胚性愈伤组织小滴玻璃化法超低温保存可以保证其遗传资源的稳定性;为江西铅山红芽芋种质资源的离体保存提供了一条新的途径。 相似文献
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何首乌愈伤组织的诱导 总被引:4,自引:2,他引:4
研究了外植体、光暗条件、植物激素等因子对何首乌愈伤组织诱导的影响 ,以及 6 -BA和何首乌组织提取液对愈伤组织增殖的影响。结果表明 :茎段的愈伤组织诱导优于带侧芽茎段和叶片 ;光照有利于愈伤组织的诱导 ;4因子 4水平的正交实验表明 ,对何首乌茎段愈伤组织诱导的影响 2 ,4 -D >6 -BA >IBA >IAA ,最佳激素搭配是 :MS +2 ,4 -D 2mg L +6 -BA 1mg L +IBA1mg L或MS +2 ,4 -D 2mg L +6 -BA 2mg L +IAA 1mg L ;MS培养基中附加 6 -BA或组织提取液均促进愈伤组织的增殖。 相似文献
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仙客来组织培养中再生器官类型及增殖稳定性比较 总被引:6,自引:0,他引:6
对'胜利女神'(Cyclamen persicum cv.'Victoria')和'大红'(C.persicum cv.'Dahong')两个仙客来品种成苗叶片诱导的愈伤组织,在6-BA与NAA配合的12个分化培养基上继代培养,第一次继代主要产生大量的不定芽芽点,从第二次继代后会得到5种类型的再生器官,分别为不定芽芽点、多芽球茎、多芽新梢、单芽球茎和叶片状芽丛.通过对不同再生器官增殖稳定性的试验表明,'大红'品种的多芽球和多芽新梢在继代培养中再生相同器官的稳定性比较强,由于多芽球茎的增殖率大于多芽新梢,在继代中选择多芽球茎为再生体系较理想;不定芽芽点在以后的继代中会分散产生各种再生器官,不宜作为增殖器官;单芽球茎和叶片状芽丛继代分散性强,为不正常再生器官.'胜利女神'品种多芽球茎和多芽新梢继代的稳定性比'大红'品种差,易于产生多种不正常器官. 相似文献
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CO2 accumulation in different culture systems containing embryogenic cell suspension cultures of cyclamen (Cyclamen persicum Mill.) was analyzed. In bioreactors equipped with a bubble-free or a bubble aeration system, CO2 mole fractions in the gas phase of more than 10% were determined whereas in Erlenmeyer flasks, CO2 mole fractions were below 2%. CO2 accumulation in bioreactors was severely growth inhibiting in comparison to the flasks. By removing CO2 in the aeration gas of a bubble-free aerated bioreactor, cell growth comparable to that in flasks was achieved. The regeneration ability of cell suspensions after being cultured in bioreactors with CO2 accumulation was better than those after culture in bioreactors without CO2 accumulation or in flasks. Received: 16 June 1998 / Revision received: 13 August 1998 / Accepted: 1 December 1998 相似文献
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仙客来(Cyclamen persicum Mill.)的种质资源RAPD分析 总被引:5,自引:0,他引:5
利用RAPD技术对20个现今栽培的名优仙客来品种的分类和亲缘关系进行研究,从100个随机引物中筛选出18个用于PCR反应,共在153个位点上扩增出条带,平均每个引物扩增位点8.5个,多态性位点144个,占总带数的94.1%。这种多肽性可以进行品种的鉴定,聚类分析将各品种材料分为4个类群。提出仙客来除目前的观赏性状分类以外,还应具有更科学的以遗传基础为基准的分类方法。也从分子水平揭示了目前栽培的仙客来品种的遗传基础的狭窄性。对RAPD技术在仙客来育种的进一步应用也作了相应的探讨。 相似文献
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Somatic embryogenesis of Cyclamen persicum in liquid medium 总被引:1,自引:0,他引:1
Marc Kreuger Erik Postma Yvon Brouwer Gerrit-Jan van Holst 《Physiologia plantarum》1995,94(4):605-612
A method is described for the production of somatic embryos of Cyclamen persicum Mill. in liquid medium. Five steps are involved; initiation of embryogenic cell lines, proliferation of pro-embryogenic masses (PEMs) on auxin-containing medium, development of somatic embryos on hormone-free medium with high osmolarity, germination and subsequent plantlet formation. Cell lines were initiated by culturing the explant, the seedling tuber, directly in liquid medium. Three parameters were important for obtaining embryogenic cell lines; explant density, hormone concentrations and subculture regime. The rate of uptake of the hormones 2,4-dichlorophenoxyacetic acid (2,4-D) and kinetin influenced the formation of PEMs. Highly embryogenic cell lines were obtained only when PEMs had formed within 5–7 weeks. PEMs were proliferated for at least 24 months and could be isolated from each subculture for the production of somatic embryos. A high sucrose content (175 m M ) in the development medium without hormones ensured efficient embryo development from PEMs. A subsequent subculture in low sucrose concentration (58 m M ) induced the formation of a tuber, thus promoting germination. Arabinogalactan-proteins (AGPs) from carrot seeds and AGPs bound by the monoclonal antibody ZUM 18 increased the number of PEMs in a culture, showing that the activity of AGPs is not species specific. 相似文献
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仙客来的离体无性试管繁殖研究 总被引:6,自引:1,他引:6
李会宁 《氨基酸和生物资源》2001,23(3):21-23
利用引种仙客来的叶片、叶柄、球茎等为外植体进行组织培养与再生植株 ,筛选最适诱导和继代增殖培养基为MS +BA 2 (mg/l,下同 ) +KT 0 .2 +2 ,4 -D 0 .5。其中叶片的诱导率和繁殖系数较高 ,叶柄次之 ;生根较难 ;球茎因常内带菌而造成培养困难 相似文献
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Embryogenic and non-embryogenic callus lines derived from the same diploid Cyclamen persicum genotype (`Purple Flamed') were analyzed by flow cytometry and compared to the initial plant material. The DNA content of
the diploid plant in the greenhouse was 1.12 pg DNA/2C as estimated in relation to the internal standards tomato nuclei and
chicken erythrocytes. In both callus lines the majority of cells contained the same amount of DNA as the initial plant, indicating
that no polyploidization has taken place after 5 years of culture on medium containing 2.0 mg/l 2,4-dichlorophenoxyacetic
acid (2,4-D) and 0.8 mg/l 6-(γ-γ-dimethylallylamino)purine(zip). Thus, our data suggest that in Cyclamen callus lines there was no strict correlation between the ploidy level and the ability to produce somatic embryos. Furthermore,
following the proportion of cells in the three phases of the cell cycle (G0/G1, S, G2/M) during one subculture period of 4
weeks revealed high division activity within the first 2 weeks for both callus lines cultured on the 2,4-D-containing medium.
However, when transferred to hormone-free medium, the division activity of the embryogenic cell line decreased markedly, corresponding
to the differentiation of somatic embryos. In contrast, for the non-embryogenic callus an increase in cells in the G2/M phase
was observed.
Received: 22 November 1996 / Revision received: 6 January 1997 / Accepted: 20 February 1997 相似文献
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Old flowers of Cyclamen generate few or no seeds. To understand the pollination problems of Cyclamen we investigate the general anatomy of the stigma and the style of Cyclamen persicum by scanning electron microscopy at different stages of floral maturity. Our investigations confirm that there is a hollow style. Against data commonly found in the literature, we present evidence of pollen germination and tube growth that show the stigma is not outside the style but inside it. Furthermore the maturation process of the style during the flowering time indicates a mechanism by which the stigma becomes shut off through closure at the terminal aperture of the style. At 3 to 5 days after anthesis there was the beginning closure of the style which was nearly completed at 21 days. The substance which leads to the closure is still unknown. The closure of the hollow style is a probable cause for failure of seed set in flowers not pollinated early in anthesis. 相似文献
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为建立适宜的花烛(Anthurium andraeanum Lind. )胚性悬浮细胞玻璃化超低温保存技术,采用单因素实验方法对影响玻璃化超低温保存后细胞相对存活率的主要因素进行了研究.结果表明,经玻璃化超低温保存后花烛悬浮细胞的相对存活率与悬浮细胞的继代培养时间、渗透调节剂的种类和浓度及预培养时间、装载液种类和预处理时间、PVS2脱水时间以及超低温保存后的化冻温度均有一定的关系.继代培养3和5 d,细胞的相对存活率较高(约20%);分别以0.3、0.5、0.7 mol·L-1山梨醇和60、80、100、120 g·L-1蔗糖为渗透调节剂预培养0~4 d,以0.5 mol·L-1山梨醇预培养2 d的效果最好,细胞的相对存活率为26.2%;用体积分数25%PVS2预处理15 min,细胞的相对存活率最高(29.0%);分别用体积分数100%PVS2脱水0、5、10、15、20、25和30 min,其中脱水10 min的悬浮细胞相对存活率最高(32.1%);分别在10 ℃、20 ℃、30 ℃、40 ℃、50 ℃和60 ℃水浴条件下进行化冻处理,其中用40 ℃水浴化冻的悬浮细胞相对存活率最高(32.1%).花烛胚性悬浮细胞玻璃化超低温保存和化冻的适宜流程为:将继代培养3~5 d的胚性悬浮细胞团(直径2 mm)在含0.5 mol·L-1山梨醇的1/2MS液体培养基中预培养2 d后,于4 ℃条件下处理24 h,然后先用体积分数25%PVS2室温预处理15 min,再用体积分数100%PVS2 在0 ℃条件下脱水10 min,最后迅速投入液氮中冷冻保存;将经过冷冻保存的细胞置于40 ℃水浴中化冻3 min,用含1.2 mol·L-1蔗糖的1/2MS液体培养基洗涤3次(每次10 min),之后即可进行恢复培养. 相似文献