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铜在水稻愈伤组织培养再生植株中的促进作用 总被引：25，自引：0，他引：25
在培养基中添加各常用微量元素的实验结果表明,只有铜元素具有明显的促进水稻愈伤组织植株再生的作用。铜元素不仅能提高再生植株频率和数量,还能提高再生植株的重量,其作用浓度的范围相当宽广。采用添加5 μmol/L铜元素的方法调查另外15个品种的培养效果,发现其中有8个对铜元素的正向反应达到了统计学上的显著水平。据此认为,提高培养基中铜元素浓度是一种增强水稻愈伤组织植株再生的简单和有效的方法。 相似文献
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琼脂浓度对水稻愈伤组织植株再生率和内源激素含量的影响 总被引：9，自引：1，他引：9
以盐粳2号脱壳种子为外植体研究了培养基不同浓度琼脂对愈伤组织植株再生率的影响及可能的机理。在分别进行脱分化、分化和继代培养基中琼脂浓度试验时，当琼脂从0.5％提高到1.0％ 植株再生率均显著升高。在继代和分化培养基琼脂浓度均为1.0%时植株再生率最高，而脱分化培养基0.5%或1.0%琼脂和分化培养基1.0%琼脂 组合，再生率最高，两者均为1.0% 琼脂反而降低。试验还表明，随着培养基中琼脂浓度提高，愈伤组织含水量显著降低而脯氨酸含量上升。较高浓度（1.0%）琼脂继代培养的愈伤组织内源ABA含量显著高于较低浓度（0.5%）琼脂的，而ZRs含量则显著较低。同样，在分化培养过程中，较高浓度琼脂分化培养的愈伤组织内源ABA含量显著地高于较低琼脂的，而ZRs含量则相反，但差异不显著。 V 关键词：琼脂浓度：精 相似文献
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本文对五种基因型的普通大麦未成熟胚在离体培养下愈伤组织的诱导能力和植株再生能力进行了比较。初步结果表明:0.5—1.5毫米大小的未成熟胚为合适的培养材料,只要诱导培养基合适,各基因型都能诱导出愈伤组织,并达到较高的诱导率。但愈伤组织的质量在各基因型中存在显著差异。同时发现,再生植株诱导频率主要决定于愈伤组织的质量,而愈伤组织的质量直接由基因型和诱导培养基决定。不同的分化培养基在分化再生植株的作用上没有出现显著的差异。 相似文献
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采用组织培养及显微观察技术,以金花茶植株茎段、叶片、花药及离体培养的金花茶体细胞胚为试验材料,对松散型愈伤组织的获得及悬浮细胞系的建立进行了研究。结果表明:在黑暗条件下,以金花茶体细胞胚切块为外植体,在MS+KT 0.5 mg/L+NAA 8.0 mg/L+硝酸银5mg/L+蔗糖30 g/L培养基上诱导出愈伤组织后,将其转接到该诱导培养基上连续培养3个月,最后从培养物中挑选状态良好的松散型愈伤组织在分别含有肌醇与硝酸银的2种培养基上交替培养,可以获得金花茶松散型愈伤组织;方差分析表明:蔗糖添加量、肌醇添加量及硝酸银添加量均对金花茶悬浮培养液细胞密度有显著影响且后两者分别与光照条件存在相互作用;将松散型愈伤组织在分别添加100 mg/L肌醇与2.5 mg/L硝酸银的液体增殖培养基上交替培养,可以建立并保持金花茶悬浮细胞系。该研究结果可为金花茶大规模细胞培养提供科学依据。 相似文献
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YANG Feng LIU Qiaolian DAI Zhenzhen CHEN Helong GAO Jianming ZHENG Jinlong YI Kexian 《热带作物学报》2012,33(3)
研究4种基本培养基和3种剑麻外植体对愈伤组织诱导及分化的影响.结果表明,SH基本培养基对剑麻愈伤组织的诱导和分化效果最好,出愈率为100％,愈伤量大,分化率为21.1％;用于剑麻愈伤组织诱导的最佳外植体是剑麻叶片,其出愈率最高,愈伤量最大.在整个诱导和分化过程中,剑麻对N的需求不大,而低铵盐含量对愈伤组织的诱导和分化有利;在含有较高浓度的盐酸硫胺素(VB1)的培养基中,愈伤组织的诱导率、愈伤量和分化率都有显著提高;Cu、Mo、Co等微量元素和有机成分肌醇,对剑麻愈伤组织的诱导并非必需,但对愈伤组织的分化可能是极有利的. 相似文献
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研究4种基本培养基和3种剑麻外植体对愈伤组织诱导及分化的影响。结果表明，SH基本培养基对剑麻愈伤组织的诱导和分化效果最好，出愈率为100％，愈伤量大，分化率为21.1％；用于剑麻愈伤组织诱导的最佳外植体是剑麻叶片，其出愈率最高，愈伤量最大。在整个诱导和分化过程中，剑麻对N的需求不大，而低铵盐含量对愈伤组织的诱导和分化有利；在含有较高浓度的盐酸硫胺素（VB1）的培养基中，愈伤组织的诱导率、愈伤量和分化率都有显著提高；Cu、Mo、Co等微量元素和有机成分肌醇，对剑麻愈伤组织的诱导并非必需，但对愈伤组织的分化可能是极有利的。 相似文献
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本文主要研究亚麻花药培养的诱导培养基组成成份的效果,目的是提高愈伤组织的诱导和植株再生的效率.花药接种于改良的MS培养基上(培养基添加了五种不同配比的植物激素).培养基中含有2mg/L2.4-D和1mg/LBAP比相同成分培养基中含有1mg/LNAA和2mg/L6-BA(CK),愈伤组织再生苗的百分率及总的植株再生频率有显著提高.在五个处理的盐酸硫胺素的实验中,改良的MS培养基含有10mg/L盐酸硫胺素比含有2.4mg/L盐酸硫胺素愈伤组织再生苗的百分率及总的植株再生频率显著提高.在麦芽糖的五个处理中以培养基中含有6%或9%的麦芽糖,总的植株再生频率最高.蔗糖的浓度主要影响愈伤组织再生苗的百分率,总的植株再生效率、花粉植株的频率以及花粉植株染色体自然加倍的频率.本研究获得的单倍体品系已被应用于育种程序中. 相似文献
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小麦幼胚再生培养体系优化及优良转化受体基因型的筛选 总被引：4，自引：0，他引：4
为建立适于优良小麦品种遗传转化的高效组织培养体系,以20个优良小麦推广品种为材料,对以幼胚为外植体的愈伤诱导、分化和生根壮苗培养基进行筛选.结果表明,添加500 mg/L水解酪蛋白、100 mg/L脯氨酸、100 mg/L谷氨酰胺,并以40 g/L麦芽糖为碳源的MXD2培养基的出愈率最高,愈伤质量最好.以大量元素减半的1/2 MX为基本分化培养基,添加1 mg/L ZT和0.5 mg/L IAA对愈伤组织诱导分化的效果最好,分化率最高达到83.0%.以1/2 MX培养基中添加0.5 mg/L IAA和0.5 mg/L MET的生根效果最好,且移栽成活率高.不同基因型的组织培养特性差异显著,筛选到扬麦158、南农9918、济麦20、宁麦9号等8个基因型可作为优良的转基因受体材料,并初步建立起适合于它们的植株再生体系. 相似文献
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An evaluation of callus induction and plant regeneration in twenty-five turf-type tall fescue (Festuca arundinacea Schreb.) cultivars 总被引：4，自引：0，他引：4
In order to investigate the genetic variation in tissue culture response and to find the cultivars with high regeneration ability for genetic transformation, twenty-five turf-type tall fescue ( Festuca arundinacea Schreb.) cultivars, including many elite ones released recently, were evaluated for their callus induction and plant regeneration responses. Callus induction was initiated from mature seeds on a Murashige and Skoog (MS) medium containing 9·0 mg l–1 2,4-dichlorophenoxyacetic acid (2,4-D). Induced calli were subcultured on the same medium with 2·0 mg l–1 2,4-D and then transferred to a MS medium supplemented with 2·5 mg l–1 6-benzylaminopurine (BAP) for plant regeneration. Significant differences were observed among the twenty-five cultivars in both callus induction and plant regeneration ( P < 0·001). Callus induction rate of viable seeds varied from 4·4% to 51·9%. Callus regeneration rates ranged from 16·7% to 58·8%. Overall regeneration rates (number of regenerated calli over number of cultured viable seeds) ranged from 1% to 22%. Approximately 94% of the regenerants were green plantlets. 相似文献
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野生稻原生质体培养与植株再生 总被引：7，自引：0，他引：7
三个野生稻（O. rufipogon,O. glumaepatula 和O. latifolia）成熟胚,经愈伤组织诱导和悬浮细胞培养,分离原生质体,利用简化原生质体培养基（SPCM）,结合琼脂糖包埋,并附加看护细胞培养液,这三个野生稻原生质体均得到了成功培养,其中两个（O. rufipogon和O. glumaepatula ）分化了绿色植株。看护细胞液在野生稻原生质体培养中,可促进细胞分裂,提早细胞分裂始期,细胞分裂频率（3.2％）和植板率（19.0%）分别比未加看护细胞液的培养方法高出13.3%和6.2%。看护细胞液可大大减少野生稻愈伤组织在液体中培养始期的死亡率,提高建立其悬浮细胞的成功率。原生质体克隆在适当的后培养基上进行培养,可以显著改良其结构,明显促进绿苗分化。尤其是L3培养基诱导原生质体克隆形成胚性愈伤组织或类似胚状体结构的频率达32.1%,显著高于MS和N6培养基,从而导致较高绿苗分化频率。 相似文献
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Tariq M Ali G Hadi F Ahmad S Ali N Shah AA 《Pakistan journal of biological sciences: PJBS》2008,11(2):255-259
The objective of the present study was to develop an effective protocol for optimum callus induction and complete plant regeneration for four varieties of rice (Oryza sativa L.) i.e., Super Basmati, Basmati-370, Basmati-371 and Fakhre Malakand. Calli were induced from mature seed scutelum. The Murashige and Skoog (MS) and Chu's N6 media containing hormone 2, 4-D (2, 4-Dichlorophenoxy acetic acid) in different concentrations were used for callus induction. Fakhre Malakand produced maximum calli on N6 media containing 3 mg L(-1) 2,4-D. while other three varieties showed maximum callus induction on N6 media containing 2.5 mg L(-1) 2,4-D. N6 media was found better than MS media for callus induction. For complete plant regeneration the calli of two varieties i.e., Basmati-370 and Basmati-371 were plated on N6 media containing different concentrations of NAA (1-Naphthalene acetic acid) and BAP (6-benzyl aminopurine). The maximum regeneration frequency (%) was observed on N6 media containing NAA 1 mg L(-1) and BAP 2.5 mg L(-1). It took 27-30 days for the callus to regenerate into a complete plant. Basmati-370 produced 4-7 plantlets per callus whereas Basmati-371 produced 4-8 plantlets per callus with regeneration frequencies of 61 and 69%, respectively. 相似文献
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S. Kumar R. Tiwari A. Chandra A. Sharma R. K. Bhatnagar 《Grass and Forage Science》2013,68(3):459-468
In vitro direct plant regeneration of lucerne was achieved by simultaneous application of thidiazuron (TDZ) and 6‐benzyladenine (BA) in Murashige and Skoog (MS) medium. Seedlings were germinated and grown for 6 d on growth regulator–containing MS medium. The shoot tip, consisting of the apical meristem along with parts of the cotyledonary leaves and hypocotyl, was then cultured on a medium containing the growth regulator(s). Adventitious budding of the shoot tip was promoted synergistically by treatment with TDZ and BA, and a maximum of thirty‐five shoots per explant was obtained on a medium supplemented with 2 mg L?1 TDZ and 1 mg L?1 BA. Plant regeneration frequency varied from 67 to 93%, and five Indian lucerne cultivars responded well to the regeneration protocol. The Agrobacterium‐mediated transformation frequency from co‐cultivated explants was 13% following multiple shoot induction. Southern analysis of the T0 plants and T1 progenies confirmed stable inheritance of the hpt marker gene. Agrobacterium infection of the explant caused a significant reduction in the plant regeneration frequency (23%) and the number of shoots induced (11) when compared with uninfected explants. A single shoot tip provided sufficient material to regenerate and establish twenty‐seven lucerne plants, whereas only nine plants could be regenerated from an Agrobacterium co‐cultivated explant. This transformation protocol could represent a valuable improvement over existing ones for lucerne. 相似文献
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提高农杆菌介导转化水稻效率的因素 总被引：11，自引：0，他引：11
以3个籼稻品种和2个粳稻品种为对象，对农杆菌转化水稻过程中影响转化效率的因素进行了研究。结果表明，菌株AGL1和EHA105按一定比例混合共转化和转化前菌体重悬对抗性愈伤率有显著影响；琼脂粉加倍和超净工作台上风干4 h的方法因能明显提高抗性愈伤率和分化率而被认为是最适合的干燥培养方式；分化培养基中加入二甲基亚砜（DMSO）或脯氨酸（Pro）可以提高分化率；壮苗时加入适量的NAA有利于壮根并提高移栽成活率。应用此农杆菌转化系统，获得了一批经PCR和点杂交鉴定的转基因植株。 相似文献
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An improved and efficient in vitro regeneration system has been developed for Eclipta alba, a medicinally important plant, through transverse thin cell layer culture (tTCL). The transverse section of the nodal segment of field grown plants was used as tTCL explants for plant regeneration. Shoot multiplication from tTCL nodal explants was influenced by BAP and their interaction with Kin or NAA. MS medium containing 13.2 μM BAP and 4.6 μM Kin was most effective for shoot multiplication from tTCL nodal explants. Upon this medium, percent response for shoot proliferation was 100% with an average of 32.6 shoot buds per tTCL nodal explant. Regenerated shoots from tTCL nodal explants were rooted on the growth regulator free MS medium. The rooted plantlets were successfully acclimatized and established in soil with a survival frequency of 90-100%. Random amplified polymorphic DNA (RAPD) markers were used to evaluate the genetic fidelity of the micropropagated plants. RAPD profile analysis indicated that micropropagated plants were genetically similar to mother plant. 相似文献