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山茶属植物叶片DNA抽提 总被引:7,自引:0,他引:7
谭晓风 《中南林业科技大学学报(自然科学版)》1999,(4)
对植物中DNA 抽提是在分子水平上对植物进行系统分析与研究的基础性工作.经多次实验,使用改良的CTAB法抽提山茶属植物中总DNA,即在抽提前加入抗氧化剂β-巯基乙醇,并使用冷冻的异丙醇来沉淀DNA, 获得了较好的效果,其纯度和得率完全能满足常规分子生物学操作的要求. 相似文献
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不同提取方法的铁线莲属叶片总DNA提取效果 总被引:1,自引:0,他引:1
以铁线莲属植物的叶片为材料,采用CTAB-SDS法、简易CTAB法、改良CTAB法等3种提取方法,比较耗时、纯度、得率、浓度和质量等指标,以期为铁线莲属植物叶片总DNA的提取筛选适宜方法.结果表明,在纯度和浓度方面CTAB-SDS法>简易CTAB法>改良CTAB法,在节省提取时间方面改良CTAB法>CTAB-SDS法>简易CTAB法.以CTAB-SDS法所提取的9种铁线莲DNA为模板,进行PCR扩增,CTAB-SDS法提取的DNA得率高、质量好,PCR扩增成功率也较高.综合比较,采用CTAB-SDS法进行铁线莲属叶片总DNA提取效果更佳. 相似文献
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《河北林果研究》2015,(4)
为探明榆属植物基因组DNA的有效提取方法,以春榆无性系、白榆无性系、金叶榆无性系1号和2号的不同成熟度叶片为材料,并对其做不同预处理,然后采用CTAB法提取榆树基因组DNA,结果表明:嫩叶提取的DNA得率是老叶的1.4~3.0倍,嫩叶的A260/A280值在1.82~1.87之间,老叶的A260/A280值大于1.90;鲜叶片提取的DNA得率是干叶片的1.0~2.0倍,鲜叶片的A260/A280值在1.86~1.94之间,干叶片的A260/A280值在1.90~1.98之间;用低浓度的乙醇(50%~75%)浸泡新鲜嫩叶12~24h可以有效减少DNA的降解,得率在498.62~1 295.97ng/μL,A260/A280值在1.84~1.94之间;预处理液中加入3g的PVP具有较好除酚去多糖的效果,所提取的DNA得率在862.51~1 791.44ng/μL,A260/A280值在1.92~1.98之间。 相似文献
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以山茶属5种油茶组植物和20种金花茶组植物的叶片为材料抽提DNA,利用筛选出的16种多态性随机引物进行PCR扩增,将扩增出来的多态型谱带转化为0-1数据,利用0-1型数据聚类软件进行RAPD聚类分析,将5种油茶组植物分为3大类,20种金花茶组植物分为4大类,分类结果与张宏达分类系统大致相同,并对差异很小的一些物种提出了合并建议. 相似文献
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以油菜为实验材料,探讨了植物线粒体DNA提取纯化过程中的影响因素,构建了一套快捷、经济、高效的植物线粒体DNA提取纯化方法.该方法结合差速离心和密度梯度离心分离得到线粒体,酶消化处理去除其他基因组的污染,用SDS与蛋白酶裂解线粒体,通过高盐沉淀,有机溶剂抽提,最后再用CTAB纯化得到mtDNA.用该方法提取的油菜线粒体DNA,经紫外分光光度计测定其纯度、限制性内切酶进行酶切.结果表明,此提取方法得到的mtDNA,其纯度可以满足后续遗传学分析.该法适用于不同植物材料mtDNA的提取纯化. 相似文献
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The use of Eucalyptus trees, in association with other plants, has the potential to reduce the growth of neighbouring plants or grasses by competing for resources or releasing allelochemicals that may cause other plants to grow slowly. Our purpose here is to assess whether border planting of Eucalyptus is harmful to the establishment,growth, and production of Cymbopogon winterianus at various distances from tree lines in the Wondo Genet Agricultural Research Center in Southern Ethiopia. Several factors were studied: growth performances and yield of aromatic grasses; soil properties, including total nitrogen,organic carbon, and moisture content; and plant leaf nutrient content(NPK) at various distances away from the Eucalyptus citriodora border line were studied. Chemical compositions of hydro-distilled essential oils obtained from selected C. winterianus grasses leaves were analysed by gas chromatography. Plant height, biomass yield, amount of essential oil yield, and essential oil composition all were significantly affected due to Eucalyptus effect in the first10-m distance as compared to beyond 10 m from the tree border line. There were increases in soil total nitrogen,organic carbon, and moisture content with decreasing distances to the Eucalyptus tree border. The result of plant leaf nutrient content(NPK) differed across treatment and distance. The pot experiment(15 cm 9 20 cm), shoot length,and number of leaves of aromatic plants varied in the degree of inhibition based on the concentration of the aqueous extract. Significantly higher inhibitions of the shoot length and number of leaf parameters were observed when using 25% fresh leaf extract compared to other extract levels. 相似文献
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揭示桉树人工林不同成熟度的叶片器官所需营养元素变化以及土壤肥力对其影响,对于桉树营林和科学施肥具有重要的生产指导意义。选取广西隆安县小林镇和田东县思林镇的桉树2代萌芽林作为研究对象,测定两个人工林嫩叶、成熟叶、黄叶的C、N、P、K、B、Ca、Mg以及土壤C、N、P、K、Ca、Mg元素含量,并进行相关分析。结果表明,植物叶片的N、P、K、Mg营养元素转移规律是黄叶向成熟叶和嫩叶转移,但C、Ca、B营养元素则是随着叶片的生长发育逐渐积累,黄叶中含量最高,说明施肥时应关注Ca、B元素的持续和有效供给。两片人工林都表现出类似的规律,说明土壤肥力的差异不影响桉树人工林叶片营养元素的内循环规律。桉树嫩叶营养元素含量及其生态化学计量比学特征具有与成熟叶和黄叶不同的表征,在营养物质研究中应予以足够重视。 相似文献
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粗皮桉再生系统的研究(英文) 总被引:1,自引:0,他引:1
该研究在国内外首次报导了粗皮桉的再生系统 .利用粗皮桉的外植体通过两种不同的再生途径建立了高效的再生系统 .首先探讨了粗皮桉的下胚轴和子叶的体细胞胚胎发生 .研究发现 ,下胚轴和子叶在含有 2 ,4 D(添加有BA或激动素 )的培养基上可诱导三种典型不同的愈伤类型 .其中 ,来源于下胚轴的颗粒状的、松脆的胚性愈伤在分化培养基上可获得高频率的再生小植株 .讨论了不同类型的愈伤组织和其对应的分化再生率之间的关系 .此外 ,本研究探讨了来源于粗皮桉的下胚轴、子叶及成熟叶片在添加有一系列BA和NAA的不同浓度组合的B5培养基上的器官发生途径 ,三种不同的外植体在不同的再生培养基上的最高再生频率不同 ,其中成熟叶片、子叶和下胚轴的最高再生率逐渐提高 ,分别为 4 1 6 7%、6 6 6 7%和 83 33% .该文还讨论了两种不同再生系统的意义 相似文献
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采用室内水培试验法,研究了铝处理对广西区2个优良桉树无性系(Eucalyptus grandis×E.urophylla No.9和E.urophylla No.4,分别记为G9、G4)根系及叶片内MDA含量的影响。结果表明:2个桉树无性系根内MDA含量均比叶内高;铝处理下,2个桉树无性系幼苗的MDA含量明显升高,G4根中MDA含量最高,达11.49μmol·g-1,根中MDA含量比叶中高,桉树无性系幼苗根部受铝伤害较叶严重。 相似文献
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Pressure-volume analysis was used to study effects of irrigation and fertilization on the water relations of newly expanded juvenile leaves of Eucalyptus globulus Labill. seedlings growing in Portugal's Atlantic region. In May, at the beginning of the dry season, fertilization and irrigation treatments had no significant effects on the water relations parameters investigated. In September, at the end of the dry season, leaves from non-irrigated plants had a significantly higher apoplasmic water content and a higher dry weight/turgid weight ratio than leaves of similar physiological age from irrigated trees. The osmotic potential at full turgor and the water potential at the wilting point were lower in non-irrigated than in irrigated plants. Changes in osmotic potential at full turgor were negatively correlated with changes in dry weight/turgid weight ratio, suggesting that reductions in osmotic potential at full turgor were largely the result of decreases in cell size. Fertilization had no detectable effect on these variables or on leaf tissue bulk modulus of elasticity. Tissue elasticity was also unaffected by irrigation. Independently of water and nutrient supplies, leaf elasticity was higher and relative water content at the wilting point lower in leaves sampled in May than in leaves sampled in September. In non-irrigated plants, leaves sampled in September had a lower tissue elasticity and a lower osmotic potential at full turgor than leaves sampled in May, indicating that leaves produced at the end of the dry season generate lower water potentials as turgor is lost than leaves expanded early in the season. 相似文献
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Light availability strongly affects leaf structure of the distinctive ontogenetic leaf forms of Eucalyptus globulus Labill. ssp. globulus. Late-maturing plants from St. Marys, Tasmania and early maturing plants from Wilsons Promontory, Victoria (hereafter referred to as Wilsons Prom.) were grown for 9 months in 100, 50 or 10% sunlight. Growth, biomass and leaf area were significantly reduced when plants were grown in 10% sunlight. Provenance differences were minimal despite retention of the juvenile leaf form by the Tasmanian plants throughout the study. The time taken for initiation of vegetative phase change by the Wilsons Prom. saplings increased with decreasing light availability, but the nodal position of change on the main stem remained the same. Both juvenile and adult leaves remained horizontal in low light conditions, but became vertical with high irradiance. Leaf dimensions changed with ontogenetic development, but were unaffected by light availability. Juvenile leaves retained a dorsiventral anatomy and adult Wilsons Prom. leaves retained an isobilateral structure despite a tenfold difference in light availability. Stomatal density and distribution showed ontogenetic and treatment differences. At all irradiances, juvenile leaves produced the smallest stomata and adult leaves the largest stomata. Amphistomy decreased with decreasing irradiance. Detrended, correspondence analysis ordination highlighted the structural changes influenced by ontogenetic development and light availability. Adult leaves had characteristics similar to the xeromorphic, sun-leaf type found in arid, high-light conditions. Although juvenile leaves had characteristics typical of mesomorphic leaves, several structural features suggest that these leaves are more sun-adapted than adult leaves. 相似文献
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Jasmeen Sidana Rajesh K. Rohilla Nilanjan Roy Russell A. Barrow William J. Foley Inder Pal Singh 《Fitoterapia》2010
Loxophlebal A, a new antibacterial formylated phloroglucinol was isolated from the mother liquor obtained after separation of sideroxylonals from the chloroform–methanol extract of leaves of Eucalyptus loxophleba ssp lissophloia. The structure of loxophlebal A was determined to be 3-desformyl sideroxylonal A by spectroscopic methods including 1D- and 2D-NMR. The stereochemistry of loxophlebal A was determined by chemical correlation with sideroxylonal A. This article also reports an efficient, simple and economic method for large scale isolation of sideroxylonals in a purity of > 90% from the leaves of Eucalyptus loxophleba ssp lissophloia. 相似文献
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XueXian LinShanzhi ZhangZhixiang 《中国林学(英文版)》2004,6(1):22-26
There have been many arguments on the classification of Eriocaulon Linn. by morphology so far, and little is known about the use of molecular marker for genetic for genetic diversity of Eriocaulon plants. To apply the technique of molecular marker to the research of genetic diversity of Eriocaulon plants, the study of the extraction method of DNA from the Eriocaulon plants and the RAPD system are essential for researchers. In this paper, the extraction of genome DNA from the silica-gel-dried leaves of several species of Eriocaulon distributed in China was studied, and the best RAPD analysis technique condition of Eriocaulon plants was analyzed. 相似文献
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Intumescences or abnormal, non-pathogenic, blister-like protuberant growths, form on Eucalyptus globulus Labill. and, to a much lesser extent, Eucalyptus nitens (Deane and Maiden) Maiden leaves when plants are grown in a high relative humidity environment. We examined the histology of intumescences and their effects on leaf photosynthetic processes. Intumescences were induced by placing E. globulus and E. nitens seedlings in a relative humidity of 80% in a greenhouse for 5 days. Symptomatic and asymptomatic leaves of plants with intumescence development were compared with leaves of control plants. Light-saturated carbon dioxide (CO(2)) assimilation (A(max)) and responses of CO(2) assimilation (A) to varying intercellular CO(2) partial pressure (C(i)) were measured. Symptomatic and asymptomatic leaf samples were fixed and sectioned and cellular structure was examined. Intumescences greatly reduced the photosynthetic capacity of E. globulus leaves and were associated with reduced electron transport rate and ribulose bisphosphate (RuBP) regeneration capacity. Tissue necrotization and cellular collapse of the palisade mesophyll and deposition of phenolic compounds in the affected areas, probably reduced light penetration to photosynthesizing cells as well as reducing the amount of photosynthesizing tissue. Photosynthetic capacity of E. nitens was unaffected. The intumescences resembled simple lenticels, both morphologically and developmentally. To our knowledge, this is the first time that lenticel-like structures developed in response to environmental conditions have been described on leaves. 相似文献