首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 46 毫秒
1.
红海榄根部盐胁迫反应的比较蛋白质组学分析   总被引:3,自引:0,他引:3  
红海榄(Rhizophora stylosa)是一种典型的红树林盐生植物.本研究利用蛋白组学技术对淡栽(R0)和3% NaCl盐栽(R3)处理后的红海榄根部总蛋白进行了比较研究.双向电泳图谱的结果表明,R0和R3分别有981和972个蛋白点,蛋白点主要集中在分子量28~70 kD,等电点4.0~8.5之间. R0和R3之间差异明显的有15个蛋白点.其中,8个蛋白的表达量在R0中表达增高(10倍),而在R3中相对下降.另外,7个蛋白的表达量在R0中较低,而在R3中表达量显著增高.对这15个蛋白点进行肽质量指纹图谱分析,10个蛋白点找到匹配蛋白.功能预测分析发现,在盐水栽培上调的蛋白质一般与逆境胁迫有关,淡水栽培上调的蛋白质一般与基本代谢有关.这些研究结果为进一步研究红海榄的耐盐机理提供了有意义的线索.  相似文献   

2.
研究了青藓科的7种1变种(Brachythecium planiusculum,Eurhynchium coarctum,E.serricuspis,Rhynchostegium leptomitophyllum,R.longirameum,R.pallenticaule,R.subspeciosum和R.subspeciosum var.filiforme)的模式标本。提出了3个新组合(E urhynchium longirameum,E.filiforme,Bryhnia serricuspis),  相似文献   

3.
中国青藓科研究资料(Ⅲ)   总被引:1,自引:0,他引:1  
研究了青藓科的7种1变种(Brachythecium planiusculum,Eurhynchium coanctum,E.serricuspis,Rhynchostegium leptomitophyllum,R.longirameum,R.pallenticaule,R.subspeciasum和R.subspeciosum var.filiforme)的模式标本。提出了3个新组合(Eurhynchium longirameum,E,filifome,Bryhnia serricuspis),将R.leptomitophyllum作为E.savatieri Schimp.ex Besch.异名处理,其余4个种得到承认。  相似文献   

4.
 黑素皮质素受体-2(MC2R)具有7个跨膜区(Ⅰ~Ⅶ)、3个胞外环和3个胞内环,人MC2R基因定位于18p11.2;编码区长894 bp,无内含子,在种间和种内具有较高保守性;人MC2R有297个氨基酸残基,推测分子量为33 kD.MC2R主要分布于肾上腺皮质区网状带和束状带,在功能上与腺苷酸环化酶偶联,通过激活依赖环腺苷酸的信号途径来催化类固醇合成;MC2R合成受到各种因子调节,包括其自身配体ACTH、顺式作用元件和反式作用因子等.MC2R基因突变可导致Ⅰ型家族性糖皮质激素缺乏症;迄今为止,在FGD患者中共发现37个MC2R基因编码区突变,突变单独或复合存在降低MC2R活性  相似文献   

5.
鹅观草属三个种的染色体组分析与同工酶分析   总被引:17,自引:2,他引:15  
本文通过对鹅观草属的三个种:鹅观草(Roegneria kamoji Ohwi)、纤毛鹅观草(R. ciliaris (Trin.) Nevski)和竖立鹅观草(R. japonensis (Honda)Keng)的染色体组分析和二种同工酶电泳酶谱的分析,研究了这三个种的系统关系。两个种均含有两个相同的染色体组。R. kamoji和R. ciliari、R. japonensis的杂种F_1减数分裂均不正常,不能结实;而R. ciliaris和R. japonensis的正反交杂种F_1减数分裂规则,结实正常,两个种之间无生殖隔离。R. kamoji的酯酶和酸性磷酸酯酶同工酶谱与R. ciliaris和R. japonensis有明显区别,而后二种的上述酶谱无明显差异。上述结果均一致地支持了将R. ciliaris和R. japonensis合并为一种的观点,将R. japonensis处理为R. ciliaris的变种。  相似文献   

6.
将我国广东、广西和四川杜鹃花属Rhododendron中5个种和2个变种处理为新异名,将石棉杜鹃R. shimianense Fang & P. S. Liu处理为黄花杜鹃R. lutescens Franch.的变型。  相似文献   

7.
纤毛鹅观草与本田鹅观草的生物系统学研究   总被引:1,自引:0,他引:1       下载免费PDF全文
孙根楼  刘芳  颜济  杨俊良   《广西植物》1992,12(3):222-228
本文通过对鹅观草属的两个种:本田鹅观草(Roegneria hondai Kitagawa)和纤毛鹅观草(R.ciliaris(Trin)Nevski)及其种间杂种的形态变异、染色体配对行为和同工酶电泳酶谱的分析,研究了这两个种间的亲缘关系,杂种F_1减数分裂染色体配对数很高,F_1自然条件下具有低的结实率。R.ciliaris根部和幼叶的酯酶、过氧化物酯同工酶谱与R.hondai的酶谱间存在差异。上述结果表明,R.ciliaris和R.hondai亲缘关系很近,享有两个共同的基本染色体组,可拟定R.hondai的染色体组为S~hy~h。R.ciliaris同R.hondai间的亲缘关系较R.ciliaris同R.pendulina和R.pendulina同R.hondai间更近。  相似文献   

8.
近年来对我国 9个省的悬钩子属植物资源进行了调查采集 ,并在南京中山植物园建立了田间种质库进行观察研究。本文报导在云南省悬钩子资源调查中发现的 1个新种和 5个新变种 ,它们是 :RubusgodongensisGuetLi,R .biflorusBuch .-Ham .exSmithvar.spinocalycinusGuetLi,R .glabricarpusChengvar.eglandulosusGuetLi,R .gongshanensisY櫣etLuvar.eglandulosusGuetLi,R .parvifoliusL .var.purpureusGuetLi,R .viburnifoliusFockevar.apetalusGuetLi.  相似文献   

9.
鹅观草属三个种的形态变异与核型的研究   总被引:12,自引:2,他引:10  
本文通过对鹅观草属的三个种:鹅观草(Roegneria kamoji Ohwi)、纤毛鹅观草(R. ciliars (Trin.) Nevski)和竖立鹅观草(R. japonensis(Honda)Keng)的形态学比较和核型分析研究了该三个种的系统关系。R. kamoji与R. ciliaris、R. japonensis形态上的差异明显,而后二个种差异甚小,难以进行划分。R. kamoji的核型公式为:2n=6x=42=30m+8sm+4SAT;R. ciliaris为:2n=4x=28=18m+6sm+4SAT;R. japonensis为:2n=4x=28=18m+6sm+4SAT。t-测验的结果表明R. ciliaris与R. japonensis的核型无显著差异。因此笔者认为R. ciliaris和R. japonensis应合并为一种系内的分类群。  相似文献   

10.
内蒙古毛莨属的分类研究   总被引:1,自引:1,他引:0  
赵一之 《植物研究》1989,9(1):61-72
本文记载了内蒙古境内毛莨属植物23种、1变,种比1978年出版的“内蒙古植物志”第二卷增加了13种、1变种,其中发现新种2个——R.alaschanicus Y.Z.Zhao和R.int-ramongolicus Y.Z.Zhao,新种组合1个——R.yinshanensis(Y.Z.Zhao)Y.Z.Zhao,内蒙古分布新记录4个——R.popovii Ovcz.、R.brotherusii Freyn、R.tanguticus(Maxim.)Ovcz、R.submarginatus Ovcz.。  相似文献   

11.
Chromosome numbers are presented for 32 collections of 29 European blackberry species (Rubus subg.Rubus) from Germany. One species is triploid (2n = 21), 27 species are tetraploid, (2n = 28), and one species is pentaploid (2n = 35). Chromosome numbers are reported for the first time ofR. adspersus, R. amisiensis, R. calvus, R. conothyrsoides, R. contractipes, R. demissus, R. elegantispinosus, R. ferocior, R. foliosus, R. hypomalacus, R. leucandrus, R. nemorosus, R. platyacanthus, R. praecox, R. rhombifolius, andR. rhytidophyllus. Chromosome numbers forR. dasyphyllus, R. gelertii, R. glandithyrsos, R. lamprocaulos, R. lindebergii, R. macrophyllus, R. montanus, R. muenteri, R. pedemontanus, R. polyanthemus, R. senticosus, R. silvaticus, andR. vigorosus are confirmed.  相似文献   

12.
The heterokaryotic and vegetative diploid phases of Colletotrichum lindemuthianum are described using nutritional and biochemical markers. Nitrate non-utilizing mutants (nit), derived from R2047, R89, R73, R65, and R23 isolates, were paired in all possible combinations to obtain heterokaryons. Although pairings R2047/R89, R2047/R73, R65/R73, and R73/R23 showed complete vegetative incompatibility, prototrophic heterokaryons were obtained from pairings R2047/R65, R2047/R23, R65/R89, R65/R23, R73/R89, R89/R23, R2047/R2047, R65/R65, R89/R89, R73/R73, and R23/R23. Heterokaryons gave rise to spontaneous mitotic segregants which carried markers corresponding to one or the other of the parental strains. Heterokaryons spontaneously produced prototrophic fast-growing sectors too, characterized as diploid segregants. Diploids would be expected to yield auxotrophic segregants following haploidization in basal medium or in the presence of benomyl. Parental haploid segregants were in fact recovered from diploid colonies growing in basal medium and basal medium containing the haploidizing agent. Although barriers to the formation of heterokaryons in some crosses were detected, the results demonstrate the occurrence of parasexuality among vegetative compatible mutants of C. lindemuthianum.  相似文献   

13.
发根农杆菌菌株的综合鉴定及活力比较   总被引:2,自引:0,他引:2  
利用3-酮乳糖产物法、差异酸生成实验和游动性实验鉴定发根农杆菌菌株A4、R1205、R1000、R1601、R1022和15834的菌株类型和活力。结果表明,R1205、R1601、R1000、A4为Ⅱ型农杆菌,其活力从大到小依次是R1000、R1205、A4、R1601。利用PCR方法鉴定表明,A4、R1205、R1000和R1601为发根农杆菌,而R1022和15834未出现阳性结果。黄瓜遗传转化力鉴定结果表明,R1000的遗传转化力最大,达到79.16%,其它菌株依次是R1205、R1601、A4。根据上述三方面综合鉴定,R1000菌株活力最大。  相似文献   

14.
Fu SL  Tang ZX  Ren ZL 《遗传》2011,33(11):1258-1262
以重复序列pAS1和pSc119.2为探针,对八倍体小黑麦×普通小麦的F5代植株进行了FISH分析,同时对这些材料进行了田间抗病性鉴定。从中鉴定出了1R、2R、3R、4R、5R、6R、7R单体附加系和1R、2R二体附加系,1R和4R附加系出现频率相对较高。5R和6R单体附加系对白粉病免疫,推测5R染色体上带有新的白粉病抗性基因。此外,还检测到不少植株染色体组发生了变异,且小麦4B染色体优先缺失。  相似文献   

15.
The taxonomy, ecology and distribution of Rinodina deflectens, R. interjecta, R. rinodinoides, R. tephraspis and R. trachytica are treated. New combinations are made for R. interjecta and R. rinodinoides. R. melanocarpa and R. serpentini are synonyms of R. rinodinoides. R. badiella and R. kentuckyensis are synonyms of R. tephraspis , and R. iberica of R. trachytica.  相似文献   

16.
地黄属种间亲缘关系研究   总被引:10,自引:1,他引:9  
闫坤  赵楠  李宏庆 《西北植物学报》2007,27(6):1112-1120
对地黄属6个物种进行了形态解剖学观察、染色体计数、核核糖体内转录间隔区(ITS)序列分析.结果表明,茎的高度、幼叶形态、花萼和花冠形态及颜色、种子千粒重和大小、外种皮网壁厚度、外种皮内侧网纹直径等均是该属内分类的可靠依据.高地黄与裂叶地黄在外部形态及解剖结构的各个方面均极为近似,地黄与茄叶地黄间也存在较大的相似性.茄叶地黄、高地黄、湖北地黄、天目地黄的染色体数目,分别为n=28、14、14、14,确认地黄和茄叶地黄为属内四倍体物种,其余种均为二倍体.ITS测序分析显示,地黄属为单系起源,天目地黄与湖北地黄、高地黄与裂叶地黄、地黄与茄叶地黄构成属内3个分支,与形态学及细胞学研究结果一致.研究认为,天目地黄与湖北地黄有较近的亲缘关系;高地黄和裂叶地黄应为同一物种;地黄与茄叶地黄是属内进化水平最高的类群.  相似文献   

17.
Genetic relationships among 10 species of bugs belonging to the tribe Rhodniini (Hemiptera: Reduviidae), including some important vectors of Chagas disease, were inferred from allozyme analysis of 12 enzyme loci (out of 21 enzyme systems examined), using agarose gel electrophoresis. These species formed two clusters: one comprising Rhodnius brethesi, R. ecuadoriensis, R. pallescens and R. pictipes; the other with Psammolestes tertius, Rhodnius domesticus and the Rhodnius prolixus group comprising R. nasutus, R. neglectus, R. prolixus and R. robustus. The resulting tree was [((R. ecuadoriensis, R. pallescens) R. brethesi) R. pictipes], [R. domesticus (P. tertius [(R. nasutus, R. neglectus) (R. prolixus, R. robustus)])]. Rhodnius nasutus and R. neglectus differed by only one locus, whereas no diagnostic loci were detected between R. prolixus and R. robustus (22 loci were analysed for these four species), despite considerable DNA sequence divergence between species in each of these pairs. Allozymes of the R. prolixus group showed greater similarity with Psammolestes tertius than with other Rhodnius spp., indicating that Rhodnius is paraphyletic and might include Psammolestes.  相似文献   

18.
Cassella CM  Mills A  Lukas KE 《Zoo biology》2012,31(5):609-620
Very little research has explored regurgitation and reingestion (R/R) in orangutans. We first aimed to determine the prevalence of R/R in the North American zoo population through a survey of accredited institutions. We report the prevalence of R/R in orangutans >4 years of age as 35% with some sex and species differences. Additionally, survey respondents reported fruit and sweet foods as the most common triggers of R/R. We also explored rates of R/R in a single group of Bornean orangutans at Cleveland Metroparks Zoo. We examined the relationship between R/R and feeding schedule and opportunistically observed rates of R/R with and without the presence of browse and sweet foods. We found evidence that R/R is associated with feeding time and that the presence of browse significantly increased the amount of time that animals spent feeding. There was a trend toward decreased R/R when browse was available. We also observed higher rates of R/R when sweet foods were available and we propose that this may have mitigated some of the beneficial effects of browse. We suggest that future studies look further at nutritional influences on R/R behavior. Zoo Biol. 31:609‐620, 2012. © 2012 Wiley Periodicals, Inc.  相似文献   

19.
Cranial neural crest cell migration is patterned, with neural crest cell-free zones adjacent to rhombomere (R) 3 and R5. These zones have been suggested to result from death of premigratory neural crest cells via upregulation of BMP-4 and Msx-2 in R3 and R5, consequent to R2-, R4-, and R6-derived signals. We reinvestigated this model and found that cell death detected by acridine orange staining in avian embryos varied widely numerically and in pattern, but with a tendency for an elevated zone centered at the R2/3 boundary. In situ hybridization of BMP-4 mRNA resolved to centers at R3 and R5 but Msx-2 resolved to the R2/3 border with only a faint smear from R5 to R6. Outgrowth of neural crest cells was less in isolated R3 cultures than in R1+2, R2, and R4 cultures, but R3 showed neither a decrease in outgrowth of neural crest cells nor an increase in cell death when cocultured with R1+2, R2, or R4. In addition, in serum-free culture, exogenous BMP-4 strikingly reduced neural crest cell outgrowth from R1+2 and R4 as well as R3. Thus we cannot confirm the role of intraneural cell death in patterning rhombomeric neural crest outgrowth. However, grafting quail R2 or R4 adjacent to the chick hindbrain demonstrated a neural crest cell exclusion zone next to R3 and R5. We suggest that one important pattern determinant for rhombomeric neural crest cell migration involves the microenvironment next to the neural tube.  相似文献   

20.
T E Lobanok 《Genetika》1975,11(5):119-126
The compatibility of four wild type fi+R factors to R1 factor, a representative of the FII compatibility group of F-like class of the plasmids was studied. Two of them (R448 and R459) were incompatible to the R1 factor at selective for R448 and R459 donors conditions. The recipient R1 factor elimination apparently takes place at the first generations of conjugants. The compatibility of these R plasmids to R1 is possible at selective for donor and recipient plasmids conditions. R459 and R1 factors were transfered to Escherichia coli W945 simultaneously and recombination between them was suggested. B211 and R215 factors are compatible to R1 factor and their coexistence with the last is stable despite whether conjugants were selected on one or two R plasmids principle. Further conjugants transfer R211 and R215 only, but not R1. It is concluded that R factors No 448 and No 459 are of FII group compatibility. R211 and R215 factors group compatibility is still unknown.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号