共查询到20条相似文献，搜索用时 62 毫秒
1.
为了筛选出适合玛咖贮藏根总RNA的提取方法,本研究比较了改良异硫氰酸胍法、CTAB法、Trizol法和E.Z.N.A.TM Plant mi RNA Kit试剂盒法等4种方法对玛咖根总RNA提取的效果。结果表明:改良异硫氰酸胍法提取效果不理想,CTAB法存在DNA污染;Trizol法和E.Z.N.A.TM Plant mi RNA Kit试剂盒法能有效去除多糖,提取出质量高、完整性好的RNA,OD260/OD280值大部分都在1.8~2.0之间,但Trizol法提取RNA的平均得率(156.3μg/g)是E.Z.N.A.TMPlant mi RNA Kit试剂盒法提取RNA的平均得率(48.6μg/g)的3.2倍,说明Trizol法可作为玛咖根总RNA提取的首选方法。 相似文献
2.
银杏叶片RNA提取方法的研究 总被引：3，自引：2，他引：1
为了获得一种银杏（Ginkgo biloba L.）叶片总RNA提取的理想方法,为后续的分子生物学研究打下基础,笔者以不同生长期的叶片为材料,利用生物分光光度计和凝胶电泳法比较了改良CTAB法、乙二醇丁醚法以及改良Trizol法提取的银杏总RNA的产率和纯度。结果表明：改良Trizol法所提取RNA的OD260/OD280比值介于1.8~2.0之间,并且OD260/OD230在1.9~2.1之间,具有较高的纯度。凝胶电泳结果表明,改良Trizol法有28S rRNA和18S rRNA 2条清晰的条带,且很少有降解;CTAB法获得的RNA品质也较好,但存在降解和弥散现象,乙二醇丁醚法提取效果较差。这表明改良Trizol法提取的总RNA具有很高的纯度,可以满足进一步分子生物学研究的要求。 相似文献
3.
百合总RNA提取方法的比较和分析 总被引：8，自引：1，他引：8
以卷丹、麝香百合品种富田和离体鲜切花的花蕾为材料,比较Trizol法、异硫氰酸胍法、CTAB改进法和SDS改进法提取总RNA的效果,结果表明,SDS改进法能有效去除多糖,提取的RNA中28S rRNA亮度约为18S rRNA的两倍,OD260/OD280值介于1．7-2．2之间,卷丹RNA得率为132．52μg／g,富田RNA得率为186．88μg／g。进一步用SDS改进法分别提取富田外轮花瓣、内轮花瓣、雄蕊、雌蕊、叶和茎的RNA,同样可以获得完整的纯度高的RNA,其中28S rRNA亮度约为18S rRNA的两倍,OD260／0D280值介于1．7～2．2之间,说明此方法适用于百合各个组织RNA的提取。经RT—PCR获得了花发育基因的特异性条带,说明用SDS改进法从百合中提取的RNA质量好、产率高、完整性强,完全适合于百合进一步的分子生物学研究。 相似文献
4.
百合鳞片总RNA提取方法的比较 总被引：1，自引：0，他引：1
为了筛选出适合百合鳞片的总RNA的提取方法,本研究以东方百合品种Siberia的鳞片为材料,比较了Trizol法、改良Trizol法、RNA提取试剂盒以及改良CTAB法提取RNA的效果。结果表明:Trizol法、改良Trizol法及RNA plant plus Reagent提取试剂盒均不能提取到完整的RNA;离心柱型植物总RNA提取试剂盒存在DNA污染;改良CTAB法能有效去除多糖,28S条带的荧光亮度是18S条带的1.5～2倍,D260/D280值都在1.9～2.1之间,D260/D230值大于2,两个样品的平均得率分别为103.57μg/g和119.21μg/g,说明此方法适合百合鳞片RNA的提取。RT-PCR结果扩增出了特异性条带,说明改良CTAB法从百合鳞片中提取的RNA质量高、完整性好、产率高,完全可以用于后续的分子生物学实验。 相似文献
5.
改良TRIZOL试剂法提取矮牵牛衰老花瓣总RNA 总被引：3，自引：1，他引：2
摘 要:从矮牵牛衰老花瓣中有效提取总RNA,是研究调控矮牵牛花瓣衰老相关基因逆转录PCR(RT-PCR)及其它分子生物学实验的前提.矮牵牛衰老花瓣富含色素等物质,提取时对传统的Trizol法进行了改良.利用普通琼脂糖凝胶电泳及紫外分光光度计对总RNA的完整性和浓度进行了检测.总RNA经电泳检测后,28S和18SrRNA条带清晰可见,且两者亮度比在1.0-2.0之间;总RNA用DEPC处理水稀释后,紫外吸光度D260/D280在1.75;经RT-PCR后,电泳检测,出现了清晰的目的条带.改良的Trizol试剂法能有效提取矮牵牛衰老花瓣RNA,且提取的总RNA可经RT-PCR成功的扩增出目的片段. 相似文献
6.
血红鸡爪槭叶片总RNA提取方法的比较研究 总被引：1，自引：0，他引：1
血红鸡爪槭叶片中富含多糖、多酚物质,严重影响了RNA提取纯度和质量。为了获得适宜血红鸡爪槭叶片总RNA提取的方法,采用柱式植物RNAout法、TRIZOL法和改良CTAB法3种提取方法对其叶片总RNA提取效果进行比较分析。结果显示,采用柱子法提取获得的总RNA产率最高,但是有DNA污染;TRIZOL法提取的总RNA OD260∕OD280为1.65,可能有多糖和酚类物质的污染,并且产率最低;改良CTAB法提取的总RNA纯度很高,OD260/OD280平均值在2.0左右,产率在上述两种方法之间,电泳图清晰,而且改良CTAB法提取的总RNA,经RT-PCR获得了清晰的特异性条带。表明改良CTAB法提取的总RNA纯度和产率高,完全可以满足进一步分子生物学研究的需要,是血红鸡爪槭叶片总RNA提取的适宜方法。 相似文献
7.
剑麻不同组织RNA提取方法比较分析 总被引：6，自引：0，他引：6
本研究以剑麻茎尖、花和成熟叶片为材料,比较了SDSⅠ、SDSⅡ、CTABⅠ、CTABⅡ共4种提取缓冲液组成以及Promega公司RNA提取试剂盒、Qiagen植物RNA分离试剂盒、改良Trizol法、改良SDSⅠ法、改良CTABⅠ法以及优化后的改良CTABⅠ法等6种RNA提取方法提取RNA的效果,结果表明:不同缓冲液组成对实验结果影响很大,其中缓冲液CTABⅠ提取的RNA质量和产率均较理想。6种RNA提取方法提取的RNA差异明显,其中优化后的改良CTABⅠ法可同时适合于剑麻茎尖、花和成熟叶片RNA的提取,不仅产率高,而且RNA的质量也较好,无DNA污染,OD260/OD280分别为1.87、2.04和1.98,OD260/OD230分别为2.46、2.10和2.15,产率分别为84.7μg/gFW、65.8μg/gFW和4μg/gFW。用该方法提取的RNA可满足下一步文库构建及基因克隆等分子生物学研究。 相似文献
8.
《分子植物育种》2016,(4)
水茄果实中富含多糖、蛋白、色素和其他代谢物质,影响其总RNA提取的质量。本研究中比较Trizol法、改良Trizol法、改良CTAB法和两种试剂盒法5种方法提取的水茄果实总RNA,用琼脂糖凝胶电泳检测总RNA的完整性,Onedrop光谱仪检测总RNA的浓度和纯度。结果表明:改良Trizol法最为有效,该方法提取的总RNA在琼脂糖凝胶上得到清晰的28S和18S条带,OD_(260nm)/OD280nm值在1.8~2.1之间、OD_(260nm)/OD_(230nm)的比值大于2.0;改良CTAB法获得的RNA质量较好,但步骤较为繁琐,耗时长;Trizol法和试剂盒法得到总RNA浓度较低。RT-PCR试验进一步表明,以改良Trizol法获得的总RNA可用于基因分离,所得条带清晰,与目的片段大小一致且比对正确。 相似文献
9.
杏叶片与果实总RNA提取方法研究 总被引：6，自引：2，他引：4
以杏叶片及幼果为材料,分别从操作耗时、RNA质量和产量等方面比较了CTAB法、改进CTAB法、SDS法、改进SDS-酚法和RNA提取试剂盒Trizol等5种不同的RNA提取方法。结果表明：5种方法均能从幼嫩叶片中提取到总RNA;经电泳检测,28SrRNA和18SrRNA两条主带清晰,A260/A280大于1.8。在叶片RNA提取过程中,改良的CTAB法及Trizol法能获得高质量的RNA,产量也分别达到395.21和839.25μg/g。其中改良SDS以及改良CTAB能更有效减少果实RNA的提取中酚类物质和多糖等杂质的影响,获得质量高的总RNA。每种方法提取的叶片和果实的RNA经反转录后形成cDNA,并进行RT-PCR扩增,成功扩出看家基因泛素蛋白UBQ片段,说明了RNA能够很好地应用于文库构建、基因克隆等研究。 相似文献
10.
椰子果肉组织中总RNA的提取及质量分析 总被引：1，自引：0，他引：1
本研究以椰子(Cocos nucifera L.)果肉组织为材料,应用改良CTAB法对不同成熟度的椰肉组织总RNA进行提取分析.结果表明:改良CTAB法能有效去除椰肉组织中不同种类杂质的干扰,从两种不同成熟度的椰肉组织中获得了高质量的总RNA;应用琼脂糖凝胶电泳检测得到两条清晰的谱带,分别为28S和18S.通过紫外分光光度计检测含量和纯度显示:OD260/OD280值介于1.6～1.9之间,不同成熟度的椰肉组织提取的总RNA的浓度分别为0.070 μg/μL和0.053μg/μL.本研究使用的方法适用椰肉组织总RNA的提取,能够获得质量好、产率高、完整性强的总RNA,为进行椰子果实发育相关基因的克隆和分析奠定了一定的研究基础. 相似文献
11.
Jens Jensen 《Euphytica》1979,28(1):47-56
Summary The high-lysine gene in Risø mutant 1508 conditions an increased lysine content in the endosperm via a changed protein composition, a decreased seed size, and several other characters of the seed. The designation lys3a, lys3b, and lys3c, is proposed for the allelic high-lysine genes in three Risø mutants, nos 1508, 18, and 19. Linkage studies with translocations locate the lys3 locus in the centromere region of chromosome 7. A linkage study involving the loci lys3 and ddt (resistance to DDT) together with the marker loci fs (fragile stem), s (short rachilla hairs), and r (smooth awn) show that the order of the five loci on chromosome 7 from the long to the short chromosome arm is r, s, fs, lys3, ddt. The distance from locus r to locus ddt is about 100 centimorgans. 相似文献
12.
Biological Activity and Quantification of Suspected Allelochemicals from Alfalfa Plant Parts 总被引：7，自引：0，他引：7
Autotoxicity restricts reseeding of alfalfa (Medicago sativa L.) after alfalfa until autotoxic chemical(s) breaks down or is dispersed into external environments. A series of aqueous extracts from leaves, stems, roots and seeds of alfalfa ‘Vernal’ were bioassayed against alfalfa seedlings of the same cultivar to determine their autotoxicity. The highest inhibition was found in the extracts from the leaves. Extracts at 40 g dry tissue l?1 from alfalfa leaves were 15.4, 17.5 and 28.7 times more toxic to alfalfa root growth than were those from roots, stems and seeds, respectively. A high‐performance liquid chromatography (HPLC) analysis with nine standard compounds showed that the concentrations and compositions of allelopathic compounds depended on the plant parts. In leaf extracts that showed the most inhibitory effect on root growth, the highest amounts of allelochemicals were detected. Among nine phenolic compounds assayed for their phytotoxicity on root growth of alfalfa, coumarin, trans‐cinnamic acid and o‐coumaric acid at 10?3 m were most inhibitory. The type and amount of causative allelochemicals found in alfalfa plant parts were highly correlated with the results of the bioassay, indicating that the autotoxic effects of alfalfa plant parts significantly differed. 相似文献
13.
Hongyan WEI Jian ZHOU Jinguang LU Jingzheng SONG Qiongxi YU Zhihong JIANG 《Medicinal Plant》2019,(6):27-29
[Objectives]This study aimed to establish a QAMS(quantitative analysis of multi-components by single-marker)method for simultaneous determination of four phenol... 相似文献
14.
C. J. Spurr D. A. Fulton P. H. Brown R. J. Clark 《Journal of Agronomy and Crop Science》2002,188(4):275-280
Development of onion (Allium cepa L., cv. ‘Early Cream Gold’) seed under cool climate conditions in Tasmania, Australia occurred over a longer duration than previously reported, but similar patterns of change in yield components were recorded. In contrast to previous studies, umbel moisture content declined from 85 to 67 % over 57 days while seed moisture content decreased from 85 to 31 %. Seed yield continued to increase over the duration of crop development, with increasing seed weight compensating for seed loss resulting from capsule dehiscence in the later stages of maturation. Germination percentage was high and did not vary significantly from 53 to 77 days after full bloom (DAF), but mean germination time declined and uniformity of germination increased significantly over the same time period. The percentage abnormal seedlings declined with later harvest date, resulting in highest seed quality at 77 DAF. The results of this study suggest that the decision to harvest cool climate onion seed crops before capsule dehiscence will result in a loss of potential seed yield and quality. 相似文献
15.
Chunli TANG Fengxian ZHAO Hongxia CHEN Jiabao MA Jiangcun WEI Meiyan QIU Zhen XIE 《Medicinal Plant》2019,(6):60-65
[Objectives]To optimize the water extraction process of Chinese Herbal Compound Man Gan Ning and establish a method for its extraction and content determination... 相似文献
16.
D. A. Bond G. J. Jellis G. G. Rowland J. Le Guen L. D. Robertson S. A. Khalil L. Li-Juan 《Euphytica》1993,73(1-2):151-166
Progress is being made, mainly by ICARDA but also elsewhere, in breeding for resistance to Botrytis, AScochyta, Uromyces, and Orobanche; and some lines have resistance to more than one pathogen. The strategy is to extend multiple resistance but also to seek new and durable forms of resistance. Internationally coordinated programs are needed to maintain the momentum of this work.Tolerance of abiotic stresses leads to types suited to dry or cold environments rather than broad adaptability, but in this cross-pollinated species, the more hybrid vigor expressed by a cultivar, the more it is likely to tolerate various stresses. 相似文献
17.
Summary Apple and pear pollen was irradiated with doses of 0, 50, 100, 250 and 500 krad (gamma rays) and stored at 4°C and 0–10% r.h. From the in-vitro germination percentages an average LD 50 dose of about 220 krad was estimated. For both irradiated and untreated pollen a close and corresponding lineair relationship existed between germination percentage and pollen tube growth.Irradiated pollen was much more sensitive to dry storage conditions than untreated pollen, resulting in less germination and more bursting. Apparently, irradiation caused the pollen cell membrane to lose its flexibility faster than normal. Rehydration of dry-stored, irradiated pollen in water-saturated air restored germination percentages up to their initial levels. The importance of this procedure in germination trials is stressed. 相似文献
18.
[Objectives] To determine the optimum extraction technology for total phenols of leaves in Acanthopanax giraldii Harms.[Methods]The single factor test and ortho... 相似文献
19.
E. Keep 《Euphytica》1986,35(3):843-855
Summary Cytoplasmic male sterility (cms) is described in the F1 hybrids Ribes × carrierei (R. glutinosum albidum × R. nigrum) and R. sanguineum × R. nigrum. In backcrosses to R. nigrum, progenies with R. glutinosum cytoplasm were either all male sterile, or segregated for full male fertility (F) and complete (S) and partial (I) male sterility. Ratios of F:I+S suggested that two linked genes controlled cms, F plants being dominant for one (Rf
1) and recessive for the other (Rf
2).Segregation for cms in relation to three linded genes, Ce (resistance to the gall mite, Cecidophyopsis ribes), Sph
3(resistance to American gooseberry mildew, Sphaerotheca mors-uvae) and Lf
1(one of two dominant additive genes controlling early season leafing out) indicated that Rf
1and Rf
2were in this linkage group. The gene order and approximate crossover values appeared to be: % MathType!MTEF!2!1!+-% feaafiart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn% hiov2DGi1BTfMBaeXafv3ySLgzGmvETj2BSbqef0uAJj3BZ9Mz0bYu% H52CGmvzYLMzaerbd9wDYLwzYbItLDharqqr1ngBPrgifHhDYfgasa% acOqpw0xe9v8qqaqFD0xXdHaVhbbf9v8qqaqFr0xc9pk0xbba9q8Wq% Ffea0-yr0RYxir-Jbba9q8aq0-yq-He9q8qqQ8frFve9Fve9Ff0dme% aabaqaciGacaGaamqadaabaeaafaaakeaacaWGdbGaamyzamaamaaa% baGaaiiiaiaacccacaGGWaGaaiOlaiaacgdacaGG0aGaaiiiaiaacc% caaaGaaiiiaiaacccacaGGGaGaamOuaiaadAgaliaaigdakmaamaaa% baGaaiiiaiaacccacaGGGaGaaiiiaiaaccdacaGGUaGaaiOmaiaacs% dacaGGGaGaaiiiaiaacccacaGGGaGaaiiiaaaacaWGsbGaamOzaSGa% aGOmaOWaaWaaaeaacaGGGaGaaiiiaiaacccacaGGGaGaaiiiaiaacc% cacaGGGaGaaiiiaiaacccaaaGaamitaiaadAgaliaaigdakmaamaaa% baGaaiiiaiaacccacaGGGaGaaiiiaiaacccacaGGGaGaaiiiaiaacc% cacaGGGaGaaiiiaiaacccacaGGGaaaaiaadofacaWGWbGaamiAaSGa% aG4maaaa!6E4D!\[Ce\underline { 0.14 } Rf1\underline { 0.24 } Rf2\underline { } Lf1\underline { } Sph3\]. Crossover values of 0.36 for Ce-Lf
1, and 0.15 for Lf
1-Sph
3were estimated from the relative mean differences in season of leafing out between seedlings dominant and recessive for Ce and Sph
3.It is suggested that competitive disadvantage of lf
1-carrying gametes and/or zygotes at low temperatures may be implicated in the almost invariable deficit of plants dominant for the closely linked mildew resistance allele Sph
3. Poor performance of lf
1- (and possibly lf
2-) carrying gametes and young zygotes during periods of low temperature at flowering might also account for the liability of some late season cultivars and selections to premature fruit drop (running off). 相似文献
20.
Parasitic angiosperms cause great losses in many important crops under different climatic conditions and soil types. The most widespread and important parasitic angiosperms belong to the genera Orobanche, Striga, and Cuscuta. The most important economical hosts belong to the Poaceae, Asteraceae, Solanaceae, Cucurbitaceae, and Fabaceae. Although some resistant cultivars have been identified in several crops, great gaps exist in our knowledge of the parasites and the genetic basis of the resistance, as well as the availability of in vitro screening techniques. Screening techniques are based on reactions of the host root or foliage. In vitro or greenhouse screening methods based on the reaction of root and/or foliar tissues are usually superior to field screenings and can be used with many species. To utilize them in plant breeding, it is necessary to demonstrate a strong correlation between in vitro and field data. The correlation should be calculated for every environment in which selection is practiced. Using biochemical analysis as a screening technique has had limited success. The reason seems to be the complex host-parasite interactions which lead to germination, rhizotropism, infection, and growth of the parasite. Germination results from chemicals produced by the host. Resistance is only available in a small group of crops. Resistance has been found in cultivated, primitive and wild forms, depending on the specific host-parasite system. An additional problem is the existence of pathotypes in the parasites. Inheritance of host resistance is usually polygenic and its transfer is slow and tedious. Molecular techniques have yet to be used to locate resistance to parasitic angiosperms. While intensifying the search for genes that control resistance to specific parasitic angiosperms, the best strategy to screen for resistance is to improve the already existing in vitro or greenhouse screening techniques. 相似文献