共查询到20条相似文献，搜索用时 46 毫秒
1.
一种适合葡萄多种组织的总RNA提取方法 总被引：1，自引：1，他引：0
为了解决葡萄组织中总RNA提取难度大的问题,以感染葡萄卷叶病毒-3的葡萄品种‘蛇龙珠’为试验材料,采用CTAB结合SDS法对总RNA提取方法进行了研究,建立了一套适合葡萄叶片、叶柄及韧皮部等多种组织总RNA提取的方法。结果表明,该方法在多种组织中均能获得高质量的RNA,OD260/OD280=1.8~1.9,电泳结果表明,所得RNA完整性好,无降解。同时用所得RNA进行了GLRaV-3的检测,电泳结果表明该法所得RNA可满足葡萄病毒病RT-PCR检测的质量要求。该方法操作简单,结果稳定,对其他富含多酚、多糖类植物组织总RNA的提取具有借鉴意义。 相似文献
2.
为满足棉花组织micro RNA结构与功能研究的需要,建立了棉花高质量的总RNA提取方法.以陆地棉纤维和胚珠为供试材料,采用改良的异硫氰酸胍-硫氰酸铵-酸酚法提取总RNA,利用stem-loop RT-qPCR法鉴定成熟的miRNA.结果表明此方法能得到高质量的总RNA,并且miRNA的回收率较高,足以满足mi-croRNA水平的实时定量分析. 相似文献
3.
高质量的小麦种子总RNA的快速提取方法 总被引：5，自引：0，他引：5
提取高质量的RNA是从基因表达水平上研究小麦种子发育的必要条件。现有提取方法难以快速得到高纯度的小麦种子总RNA。本试验将冷酚法和Trizol一步法相结合,在5h左右就可得到高质量的总RNA。通过琼脂糖凝胶电泳、紫外分光光度计检测,提取的总RNA具有清晰的28S rRNA、18S rRNA条带,OD260/DO280比值在1．90-2．00之间。将提取的总RNA用于反转录,可获得高质量的cDNA,在cDNA—AFLP分析上可得到清晰的条带。说明这种方法获得的总RNA纯度和完整度非常高,完全满足分子生物学研究的要求。 相似文献
4.
拟南芥和烟草幼嫩种子RNA不同提取方法的比较 总被引：1，自引：0，他引：1
采用4种方法分别对拟南芥和烟草幼嫩种子的总RNA进行了提取和分析。结果表明,其中3种方法所提取的总RNA均能满足一般的下游操作。Trizol法提取的RNA质量低。CTAB-异丙醇法提取的总RNA产量最高,并具有提取步骤少,操作时间短,价格便宜等优点,可用于大量样品提取;百泰克试剂盒提取时间短,可在常温下操作;CTAB-LiCl法提取的总RNA基本无基因组DNA的污染,但是不利于小分子RNA的沉淀。经紫外分光光度计检测,3种方法提取的总RNAOD260/OD280均在1.80~1.97,表明蛋白质及其它有机溶剂的污染很少,OD260/OD230在2.03~2.37,表明盐类小分子的污染也较少;电泳检测28S rRNA和18S rRNA条带清晰,28S rRNA的亮度基本为18S rRNA的2倍,所提取的总RNA质量较高。将提取的总RNA 用于反转录,可获得高质量的cDNA,ds cDNA清晰的分布在100 bp~3000 bp之间。 相似文献
5.
草莓果实总RNA提取方法的比较 总被引：2，自引：1，他引：1
为建立草莓果实总RNA的提取方法,针对草莓成熟果实中富含多糖、多酚和色素等次级代谢物质,总RNA提取难度大的特点,比较改良的EASYspin 植物RNA提取试剂盒法和改良的CTAB法提取草莓果实中总RNA的质量。通过琼脂糖凝胶电泳和核酸蛋白测定仪(NanoDrop 2000)检测2 种方法提取总RNA的浓度、纯度及完整性等。改良的EASYspin 植物RNA提取试剂盒法和改良的CTAB法都能够完成草莓果实总RNA 的提取,电泳检测在28S 和18S 处呈2 条清晰的条带,OD260/OD280值和OD260/OD230值均在2.0 左右;改良的EASYspin 植物RNA提取试剂盒法成本较高,且提取总RNA质量劣于改良的CTAB法,但是EASYspin植物RNA提取试剂盒法操作简便,安全可靠,节省时间。通过RT-PCR验证,2种方法所获得的草莓果实总RNA质量较好,可达到分子生物学试验对RNA质量的要求。 相似文献
6.
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
7.
缺刻缘绿藻总RNA提取方法的比较研究 总被引：7，自引：1，他引：6
为了获得高质量的缺刻缘绿藻总RNA,采用CTAB法、TRIzol法和RNAplant法3种方法对该藻总RNA的提取效果进行比较分析。结果表明,采用CTAB法提取获得的总RNA产率最高,但因可能含有较多的蛋白质、多糖等杂质使得纯度最低;TRIzol法提取的总RNA纯度较CTAB法稍高,但产率最低,且仍含有DNA带;RNAplant法提取的总RNA电泳图清晰,OD260nm/OD280nm值为2.0,高于前2种方法,产率在2种方法之间,表明RNAplant法更适于缺刻缘绿藻总RNA的提取。对后者提取的总RNA,经反转录合成的cDNA产物大小在500 bp~2 kb,并能通过RT-PCR获得18 SrRNA基因的特异性片段,进一步说明利用RNAplant法可为基因克隆、表达分析等后续研究提供高质量的RNA。 相似文献
8.
利用改良的CTAB法提取棉花叶片总RNA 总被引：40，自引：16，他引：24
由于棉花基因组中含有大量的内含子,直接利用由基因组克隆的基因十分困难,目前国内外主要采用由棉花的cDNA作模板克隆基因并进行遗传转化.得到完整的cDNA必须有高质量的RNA,由于棉花组织中棉酚、多糖的含量较高,因此用通用的提取RNA的方法提取棉花RNA比较困难,国内外的许多学者针对棉花的具体情况已经发展形成几种比较有效的棉花总RNA的提取方法,如:高离子强度、高pH值提取法、热CTAB法、异硫氢酸胍法、Trizol reagent kit法、CTAB/酸酚法、热酚法和热硼酸法等;这些方法都能提出棉花的总RNA,但相比较而言,异硫氢酸胍法和Trizol试剂比较昂贵,高离子强度、高pH值提取法步骤繁琐,本文借鉴热CTAB法并进行了改良,提出一套完整可行的提取棉花叶片总RNA的经济简便的方法. 相似文献
9.
高质量提取银杏种仁总RNA的改良方法 总被引：3，自引：1，他引：2
提取高质量的RNA是获取银杏(Ginkgo biloba L.)种仁药用蛋白基因以及从基因表达水平研究林木良种银杏种子发育和后熟的必要条件。现有提取方法难以获得高纯度的银杏种仁总RNA。本研究旨在改良现有提取方法,以满足抽提富含蛋白质、多糖、多酚等特殊材料高质量RNA的需要。文中将改进的CTAB法和Trizol一步法相结合,优化了试剂组合并改进实验细节,从银杏种仁中获得了高质量的总RNA。通过琼脂糖凝胶电泳、紫外分光光度计检测,提取的总RNA具有清晰的28SrRNA、18SrRNA条带,亮度满足2：1比例关系。OD260/OD280比值在1.85~2.00之间。将提取的总RNA用于Northern杂交分析可检测到清晰的信号,而用于RT-PCR和5'-RACE也可获得清晰的目的条带。说明这种方法获得的总RNA完整度和纯度很高,完全可以满足下游分子生物学实验要求。 相似文献
10.
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
11.
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
12.
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
13.
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
14.
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
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