共查询到19条相似文献，搜索用时 187 毫秒
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本研究建立了以甘蓝型油菜下胚轴为外植体的一步不定芽再生培养和遗传转化体系。首先,以甘蓝型油菜中双11号含部分子叶节的下胚轴为外植体,从6-BA和NAA配比、Ag NO3以及无菌苗苗龄等方面对影响油菜组织培养的因素进行了研究,建立了甘蓝型油菜快速高频一步不定芽再生培养技术体系。该技术体系为,切取5 d苗龄含部分子叶节的下胚轴置于添加4 mg/L 6-BA的MS基本培养基中培养,5 d再生出不定芽,再生频率为100%。在此基础上,进行了甘蓝型油菜的遗传转化,成功地将用p FGC5941双元载体构建的Bn TFL1基因干扰载体转入中双11号中。整个转化过程中,芽的诱导生成只需5 d,接着完成抗性芽的PPT筛选需要30 d,整个转化周期从播种到得到生根抗性苗仅需大约70 d,而传统转化方法抗性芽的诱导筛选需要90 d,整个转化周期需要130 d左右,大大缩短了转化周期,简化了转化过程,提高了转化效率。 相似文献
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为构建高效的西瓜再生和遗传转化体系,本研究以西瓜‘SM1’材料子叶节为外植体,研究不同激素配比对子叶节再生的影响。在此基础上,通过农杆菌介导法导入外源基因,研究潮霉素浓度、农杆菌侵染时间、共培养时间等因素对遗传转化效率的影响,建立遗传转化体系。结果表明,‘SM1’不定芽分化最佳培养基为MS+6-BA 1.0 mg/L+IAA 0.1 mg/L,不定芽分化率为91.7%。最优遗传转化组合为农杆菌侵染时间15 min,共培养3 d,之后进行选择培养。外植体不定芽分化潮霉素最适浓度为10 mg/L,最适生根培养基为1/2MS+6-BA 0.1 mg/L+NAA 0.01 mg/L。通过潮霉素筛选和PCR鉴定,获得12株阳性转化株系,转化率为6.5%。本研究建立了高效西瓜‘SM1’再生及遗传转化体系,为进一步开展基因功能研究及西瓜遗传改良提供了技术支撑。 相似文献
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为了研究十字花科植物黑腐病菌（Xanthomonas campestris pathovar campestris,简称Xcc）hrpW基因的功能及Xcc的致病机理,实验以甘蓝型油菜为试验材料,以5~6d无菌苗的带柄子叶为外植体,建立了高效稳定的带柄子叶再生体系,同时探索了影响根癌农杆菌介导转化甘蓝型油菜子叶柄的各种因素;并用农杆菌介导法将hrpW基因导入甘蓝型油菜中,经PCR检测法分析,证明hrpW基因已整合到油菜基因组中。hrpW基因编码HarpinXcc（十字花科植物黑腐病菌Harpin蛋白）,该转基因植株的获得,为进一步研究十字花科植物黑腐病菌的致病机理提供了材料,也为选育高效抗病油菜种质奠定了基础。 相似文献
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以小豆品种‘京农6号’子叶节为外植体进行离体再生,旨在建立‘京农6号’子叶节再生遗传转化体系。本研究对农杆菌菌株EHA105侵染子叶节的时间、诱导愈伤生成的适宜6-BA浓度、诱导不定芽的激素浓度及配比及诱导不定根生长的IBA浓度等影响子叶节再生遗传转化体系的因素,结果发现农杆菌EHA105侵染的最佳时间为50 min,GUS阳性率为67.5%;诱导愈伤的适宜6-BA浓度为2.0 mg/L,诱导率为91.4%;诱导不定芽的最适激素是5.0 mg/L ZT,出芽率为62.0%;而0.1 mg/L IBA诱导不定根的效果最好,生根率可达100.0%。本研究建立了小豆‘京农6号’子叶节外植体的遗传转化体系,获得了再生植株,为小豆的CRISPR/Cas9基因编辑技术在小豆功能基因组学和育种中的应用提供了技术参考。 相似文献
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改良大豆子叶节再生体系的研究 总被引：15，自引：0，他引：15
采用大豆种子萌发5~6 d后的子叶节作外植体，对农杆菌介导的大豆遗传转化系统及其影响因素进行了研究。结果表明，将子叶节与农杆菌共培养60 h后放入含卡那霉素50 mg/L的诱芽培养基上，待苗长至4~5 cm后放入生根培养基中进行生根，最后移栽到培养土中，效果较好。对大豆遗传转化再生的主要因素，如大豆基因型、诱导出芽所需激素浓度、卡那霉素筛选压力等条件做了一系列的研究，建立了一个比较好的遗传转化系统，其转化率达到2.8%。 相似文献
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大豆子叶节植株再生体系的优化及转EPSPS基因的研究 总被引：1，自引：1，他引：0
为提高农杆菌介导转化大豆子叶节再生体系的遗传转化效率,优化了激素水平、基因型、抗生素及筛选压力等影响植株再生的多个因素,并用EPSPS基因转化大豆子叶节。结果表明,不定芽诱导培养基中6-苄氨基嘌呤(6-BA)浓度为1.6mg/L时,不定芽诱导率最高,黑农37和合丰35的不定芽诱导率较吉育91高,吲哚丁酸(IBA)诱导生根的适宜浓度为0.5~1.0mg/L。头孢霉素的最适抑菌浓度为500mg/L,草甘膦有效筛选压力为8mg/L,并获得转EPSPS基因的抗性植株。 相似文献
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以番茄无菌苗的子叶为外植体,通过农杆菌介导法对其遗传转化体系进行了优化,结果表明：外植体在MS+2 mg/L 6-BA+0.2 mg/L IAA的进行2天的预培养后,用农杆菌EHA105（浸染浓度为OD600=0.6）浸染6 min,转化效率最高,经过PCR检测初步证明NPTII基因已整合到番茄再生植株中,本研究建立了高效番茄‘白果强丰’子叶农杆菌介导的遗传转化体系。 相似文献
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Vipasha Verma Kamlesh Kanwar Mahak Tufchi Monika Kashyap 《Journal of Crop Science and Biotechnology》2014,17(1):1-10
Three different regeneration systems, viz. regeneration through callus cultures using embryonic explant, direct regeneration using shoot bud/nodal segments as explant and regeneration through cell suspension culture using cotyledonary explant (for the induction of transgenic callus for suspension culture) were evaluated to see their effect on transfer of Cry1A(b) gene to Punica granatum L. cv. Kandhari Kabuli through Agrobacterium mediated transformation. Pre-conditioning and co-cultivation durations had a marked effect on transformation frequency of different explants. Out of different explants used (embryo, shoot bud, and cotyledon) for different regeneration systems cotyledonary explant showed highest putative transformation frequency (13.54%) inducing callus on selective medium for carrying out cell suspension culture to regenerate transgenic shoots. Despite of the highest transformation frequency obtained from the cotyledon explant, the plating efficiency of the transgenic cells generated through the transgenic callus (callus formed from the cotyledonary explant) during cell suspension culture was found to be very low (0.7%). Thus the plating efficiency has also played worth mentioning role in the regeneration of transformants following cell suspension culture. Among the three regeneration systems, regeneration through callus cultures using embryonic explant was found to be best for regeneration of transformants. The highest per cent regeneration of 23.33 was obtained from the putative transgenic embrogenic calli. Successful genetic transformation in the transformed plantlets was confirmed by PCR analysis. The transformation system thus developed is valuable and may be used to produce insect resistant trees. 相似文献
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Arpita Moharana Aradhana Das Enketeswara Subudhi Soumendra K. Naik Durga P. Barik 《Journal of Crop Science and Biotechnology》2017,20(5):405-416
An efficient and reproducible protocol for in vitro plant regeneration was developed for Lawsonia inermis L. using cotyledonary node explant derived from axenic seedlings. Highest shoot proliferation frequency (ca 96.6%) was achieved on Murashige and Skoog’s, 1962 (MS) basal medium supplemented with 8.88 μM 6-Benzyladenine (BA) + 2.68 μM Napthalene acetic acid (NAA). Up-scaling of shoots was carried out using in vitro nodes on MS medium supplemented with 4.44 μM BA. So overall, an average of 238 shoots was produced at 75 days. Of the four different forms of cotyledonary node explants evaluated, highest shoot multiplication was observed in cotyledonary node explant with two whole cotyledons. In vitro regenerated shoots were best rooted (ca 34.3 roots / shoot) on ½ MS medium devoid of any growth regulator. The plantlets were successfully acclimated in sand:soil:: 1:1and established in the garden soil. Random amplified polymorphic DNA (RAPD) and inter-simple sequence repeat (ISSR) analysis revealed a homogeneous amplification profile for all micropropagated plants validating the genetic fidelity of the in vitro-regenerated plants and supporting the regeneration protocol for economic commercial exploitation. 相似文献
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Plant regeneration from cotyledons and embryonic axes in apple: Sites of reaction and effect of pre-culture in the light 总被引：1，自引：0，他引：1
Summary Mature embryos of the cultivar Gloster were isolated from seeds of fruits stored at 1 °C. Embryonic axes and wounded cotyledons
were pre-cultured in the light for 0 to 6 days on embryo growth medium (experiment 1) or for 0 to 24 hours on shoot induction
medium (experiment 2). After a subsequent dark period of 3 weeks for induction of organogenesis, explants were cultured in
the light on shoot elongation medium. Up to 95% of the embryos formed shoots, while the mean shoot number per embryo reached
6.4. Regeneration frequency was influenced by the type of explant: embryonic axes reacted better (75%) than the tops of the
cotyledons (29%) or wounds on the cotyledons (9%). The mean total shoot number per embryo comprised means of 2.3 for embryonic
axes, 1.8 for tops of cotyledons and 2.3 for wounds on cotyledons (experiment 1). Wounds on the proximal part of the cotyledon
reacted much better than those on other parts. Shoot differentiation was highest when cotyledons were cultured with the adaxial
side on the medium, suggesting that there exist gradations within the cotyledon for regeneration capacity (experiment 2).
The number of shoots per reactive site was not normally distributed, while a high frequency of 6 or more shoots per reactive
site was found (experiment 1). A pre-culture of more than 24 hours in the light seemed to have negative effect, but there
was no clear evidence whether this was a light and/or a medium effect. 相似文献
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Medium, Explant and Genotype Factors Influencing Shoot Regeneration in Oilseed Brassica spp. 总被引：9，自引：0，他引：9
G. X. Tang W. J. Zhou H. Z. Li B. Z. Mao Z. H. He K. Yoneyama 《Journal of Agronomy and Crop Science》2003,189(5):351-358
The effects of culture media, explants and genotypes on shoot regeneration in oilseed Brassica species were examined in this study. The maximum shoot regeneration frequency was obtained in Murashige and Skoog medium supplemented with 3 mg l?1 6‐benzylaminopurine and 0.15 mg l?1 1‐naphthaleneacetic acid. The addition of 2.5 mg l?1 AgNO3 was very beneficial to shoot regeneration in B. napus and Ag2S2O3 (10 mg l?1) was even superior to AgNO3 (2.5 mg l?1). Explant age, explant type and carbon source also significantly affected shoot regeneration. Four‐day‐old seedlings of cotyledonary explants showed the maximum shoot regeneration frequency and number of shoots per explant. Of the four explants – peduncles, hypocotyls, cotyledons and leaf petioles – cotyledons produced the highest shoot regeneration frequency (56.67 %). Four carbon sources – glucose, maltose, starch and sucrose – were compared for their respective effects on shoot regeneration from cotyledonary explants. Sucrose appeared to be the best carbon source for shoot regeneration with the highest shoot regeneration frequency (76.00 %). Considerable variation in shoot regeneration from cotyledonary explants was observed both between and within Brassica species. The shoot regeneration frequency ranged from 10.00 % for cv. R5 (B. rapa) to 83.61 % for cv. N1 (B. napus). Two B. napus, one B. carinata and one B. juncea cultivars exhibited shoot regeneration frequency higher than 70 %. In terms of the number of shoots produced per explant, B. rapa showed the highest variation, ranging from 5.64 for cv. R3 to 1.33 for cv. R5. Normal plantlets were regenerated from all induced shoots and developed normally. The regenerated plants were fertile and identical with the source plants. 相似文献
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优化通过器官直接再生方式的黄瓜离体再生体系,为遗传转化奠定基础。以‘长春密刺’黄瓜的子叶节为外植体,探讨在黄瓜再生过程中,适宜的无菌苗获得培养基、适宜的外植体类型、无菌苗的适宜苗态、不定芽诱导培养基和芽伸长培养基中适宜的激素组合与比例。结果表明,最适的无菌苗获得培养基为1/2MS+30 g/L蔗糖+7 g/L琼脂(pH=5.8);不同外植体的再生率为子叶节>下胚轴>子叶;子叶完全出壳但未展平的无菌苗比其他苗态的再生率高,子叶展平后,再生率迅速下降;当6-BA（6-苄基氨基嘌呤）和ABA（脱落酸）浓度一定时,最适的AgNO3为2 mg/L;当AgNO3浓度一定时,6-BA和ABA浓度的最佳组合为1.5 mg/L 6-BA+0.5 mg/L ABA;不定芽诱导的最适培养基为MS+1.5 mg/L 6-BA+0.5 mg/L ABA+2 mg/L AgNO3,出芽率为90%,每外植体出芽数为3.5;芽伸长培养基中加入0.10 mg/L 6-BA,能够促进再生芽的伸长。本研究成功优化了黄瓜的再生体系,得到了健壮的黄瓜成株。 相似文献
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为建立高效的组织培养体系，以甘蓝型油菜杂交品种恢复系627R、621R和616R材料田间种植植株的侧芽、花托和无菌种子实生苗下胚轴为外植体，探索不同苗龄、预培养时间、预培养基、愈伤分化培养基、诱导出芽培养基以及成苗壮苗培养基中激素配比对芽再生、成苗植株生长势的影响。结果表明：无菌苗快速繁殖体系中，发芽6 天的无菌苗下胚轴或者子叶在预培养（MS+ 2.0 mg/L 2,4-D+ 1.0 mg/L 6-BA+ 30 g/L 蔗糖+ 8 g/L 琼脂，pH 5.85）3 天后转移到分化培养基MS+ 3 mg/L 6-BA+ 1.0 mg/L NAA+5 mg/L AgNO3+ 30 g/L 蔗糖+8 g/L 琼脂(pH 5.85)，或者MS+ 3 mg/L 6-BA+ 1.0 mg/L IAA+ 5 mg/LAgNO3+ 30 g/L 蔗糖+8 g/L 琼脂(pH 5.85)生长，可以获得较高的芽再生频率，对于田间生长到抽薹开花期植株取样的外植体，腋芽的出芽频率高于花托培养的出芽频率，但是这2 类外植体在分化培养基（MS+ 10 mg/L 6-BA+ 1 mg/L NAA+ 30 g/L 蔗糖+8 g/L 琼脂，pH 5.85）生长30 天后都有成苗的潜力，上
述外植体经过组织培养出芽后转移到添加矮壮素的培养基（MS+15 mg/L CCC+15~20 g/L 蔗糖+8 g/L 琼脂，pH 5.85）上继续生长30 天，能够得到根系发达、生长势强的植株。甘蓝型油菜优良恢复系建立的组织培养体系能够快速获得生长势优的油菜植株，加速油菜良种的繁殖与评价。 相似文献
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黑农51子叶节和胚尖再生体系的建立及优化 总被引：1，自引：0，他引：1
为建立一个高效的大豆再生体系用于大豆的遗传转化,选用黑农51的子叶节和胚尖作为外植体,建立了黑农51的子叶节和胚尖再生体系,并研究了6-BA和IBA对大豆再生的影响。结果表明,黑农51子叶节最适芽诱导培养基为MSB5+1.0 mg/L 6-BA+ 0.2 mg/L IBA,最适生根培养基为MSB5+1.0 mg/L IBA;胚尖最适芽诱导培养基为MSB5+0.4 mg/L 6-BA+0.2 mg/L IBA,最适生根培养基为MSB5+2.0 mg/L IBA。黑农51子叶节再生体系的出芽率、出芽数、芽伸长数和生根率四个指标均高于胚尖再生体系,更适合作为遗传转化的受体材料。 相似文献
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Sumita Acharjee Pratap Jyoti Handique Bidyut Kumar Sarmah 《Journal of Crop Science and Biotechnology》2012,15(4):311-318
Regeneration has been achieved in blackgram (Vigna mungo) using thidiazuron (TDZ) in the culture medium. The explanted cotyledon with wounded embryonic axes produced the highest number (9.75–10.45) of healthy, elongated shoots when cultured on shoot bud regeneration medium (SRI) composed of 2 μM BAP, 2 μM KIN, 2 μM TDZ, and 0.5 μM NAA followed by multiple shoot regeneration (SRII) medium containing 2 μM BAP, 2 μM KIN, and multiple shoot elongation (SE) medium (0.5 μM of BAP + 0.5 μM of KIN). The presence of TDZ in combination with BAP and NAA in the SRI medium for one sub-culture cycle (10–14 days) significantly increases formation of multiple shoot buds per explant. Independent, healthy shoots obtained were selected for both in vitro rooting and grafting. Establishment of plantlets in the soil was highest (80–100%) in the case of in vitro rooted compared to grafted shoots (40%). The protocol appears to be competent to Agrobacterium-meditated transformation with ‘gus’ as a reporter gene. PCR analysis of the T0 and T1 progenies showed the presence and transmission of the transgene. We document here the regeneration and transformation of blackgram using cotyledons with wounded embryonic axes and the protocol appears to be suitable for genetic transformation of blackgram. 相似文献