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     Chen and Anodendron salicifolium Tsiang et P. T. Li are the synonyms of Raphoilepis umbellata (Thunb.)
     Chen]及柳叶鳗藤(Anodendron salicifolium Tsiang et P. T. Li)应分别为厚叶石斑木[Raphoilepis umbellata(Thunb.)
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     Clone and Primary Functional Analysis of Promoter Region of Boea crassifolia BcWRKY1 gene
     厚叶悬蒴苣苔BcWRKY1基因启动子克隆及功能元件分析
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     Clone and Primary Functional Analysis of Promoter Region of Boea crassifolia BcWRKY2 Gene
     厚叶旋蒴苣苔BcWRKY2基因5′端调控区的克隆及功能元件分析
短句来源
     Molecular Cloning of BcWRKY1 Transcriptional Factor Gene from Boea Crassifolia Hems1 and Its Preliminary Functional Analysis
     厚叶旋蒴苣苔(Boea crassifolia)BcWRKY1转录因子基因克隆及其初步功能分析
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     The new species is similar to P. crassifolia (Hemsl.)
     新种体态及叶形接近厚叶蛛毛苣苔P . crassifolia (Hemsl.)
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     The thicknessesof leaf and palisade tissue were bigger.
     及栅栏组织度大。
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     Studies on the chemical constituents of Glochidion hirsutum
     算盘子的化学成分研究
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     THE CLASSIFICATION OF LEAF BEETLES
     甲的分类
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     The Thick Film Integrated Circuit
     膜集成电路
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     The Concentrate of leaf's Nutrient
     营养素浓缩物
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  thick leaves
The hydrophytes typically had thick leaves (200-350 μm) with a well-developed aerenchyma; their specific density per unit area (100-200 mg/dm2) was lower than in terrestrial plants.
      
However, because larger ants generally cut denser leaves (Table 1), the increased density of thick leaves was offset by the reduced relative area cut by the larger ants.
      
Thick leaves with low density mesophyll became thinner and more dense with increasing growth temperature corresponding to an increase in maximum net photosynthetic rates.
      
Obligate CAM species of orchids from a lower montane rainforest (1175 m.a.s.l) comprised 26% of the species total and mostly possessed thick leaves.
      
To accommodate those chloroplasts, plants need to make thick leaves in advance.
      
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This is a continuation of two other papers.Eight new species are described,i.e.: Ctenozamites digitata,C.hongniensis,C.plicata,Ctenis pterophylloides,Pseudoctenis bifurcata,P.pachyphylla,Taeniopteris multiplicata and Lesleya triassica.The last genus is known only from Paleozoic of Europe,but it existed in the Mesozoic.

本文描述新种有:指缘篦羊齿(Ctenozamites digitata),红坭篦羊齿(C.hongniensis),褶面篦羊齿(C.plicata),侧羽叶型篦羽叶(Ctenis pterophylloides),二叉假篦羽叶(Pse-udoctenis bifurcata),厚叶假篦羽叶(P.pachyphylla),多褶带羊齿(Taeniopteris multiplicata)和三叠列斯里(Lesleya triassica)。

The brown alga Laminaria japonica is an important seaweed widely cultivated in this country. The inheritance of its frond length and width has been studied. This paper discusses only the inheritance of the frond thickness.According to our observation the development of the frond thickness was influenced by many environmental and genetic factors.Evidences collected showed that the frond thickness was a genetic character. Firstly, the frond thickness showed a positive correlation of r=0.820 between the parent...

The brown alga Laminaria japonica is an important seaweed widely cultivated in this country. The inheritance of its frond length and width has been studied. This paper discusses only the inheritance of the frond thickness.According to our observation the development of the frond thickness was influenced by many environmental and genetic factors.Evidences collected showed that the frond thickness was a genetic character. Firstly, the frond thickness showed a positive correlation of r=0.820 between the parent and the offspring in our experiment. Secondly, the frond thickness of breed II3 was observed to be significantly greater than that of breed H4 for four successive years.The frond thickness was found to be a quantitative character, showing a continuous variation. Multi-factors were believed to control the growth of the frond thickness.The genetic factors were suspected to act on the cell-size and the number of cellular layers in the cortex of the frond. The thick-frond breed H3 possessed six cell layers more than the thin-frond breed H4. Observations on the early growth of the germlings showed that the genetic factors seemed to begin to act in the young spc-rophytes about 2-4 mm long.As the natural population of this seaweed was found to be very heterozygous in genetic content, various inbred lines or breeds with different frond thickness could be obtained by intensive inbreeding and vigorous selection.

本文报道连续四年观察几个海带自交系叶片厚度的生长情况,得到了以下结果:(1)亲本海带叶片的厚度与子代的叶片平均厚度之间有着十分显著的正相关;不同自交系海带累代保持各自叶片平均厚度的特征,即厚叶品系(H_3)的叶片总是最厚的,薄叶品系(H_4)的叶片总是最薄的。这表明海带叶片厚度是一个遗传性状。(2)海带叶片厚度是一个典型的数量性状,呈连续变异。它的遗传方式可能是属于典型的数量遗传,受微效多基因的控制。(3)海带叶片厚度的遗传因子主要是作用于叶片的皮层组织,它控制皮层组织细胞的层数和皮层细胞的大小。

Forty five chemically induced polyploid Hevea plants were obtained from the budwoods of the best clones Hal Ken 3, SCATC 2-14-39 and SCATC 7-18-55. According to cytological identification, the number of chromosome in most somatic cells of these polyploid trees was 2n=45~72. Polyploid cells of each plant account for more than 60% of its total number of divided cells. A series of morphological variations occurred in these plants, for example, the mesophyll and the lateral veins became markedly thicker and the...

Forty five chemically induced polyploid Hevea plants were obtained from the budwoods of the best clones Hal Ken 3, SCATC 2-14-39 and SCATC 7-18-55. According to cytological identification, the number of chromosome in most somatic cells of these polyploid trees was 2n=45~72. Polyploid cells of each plant account for more than 60% of its total number of divided cells. A series of morphological variations occurred in these plants, for example, the mesophyll and the lateral veins became markedly thicker and the leaves dark green. The 'screening of these trees has been made up to their second or third generation. Of these polyploid trees, the biggest one is about two meters high and has produced several polyploid branches now. When colchicine+kinetin were used as mutagens, most of the first leaf stories from the treated buds were mosaics but almost all the second leaf stories became dipliods (2n=36) again. Therefore, we selected the stems of the first leaf stories with marked polyploidy variations for isolating and screening in the first asexual generation. The mutant buds obtained from this generation represent about 0.1%. It was found that only when these mutant buds continued to be budded up to the second generation for screening, could more polyploid plants be obtained. But in this generation, segregation still occurred because about 30% of normal plants were observed. After cytological identification and selection of good individual polyploid plants from the second generation for further screening, almost all plants obtained from the third generation were polyploids.

本文报道从海垦8,热研2—14—39,热研7—18—65等优良无性系芽条诱导出45株多倍体植株,经细胞学鉴定,这些植株的体细胞染色体数大多为2n=54~72,每个植株的多倍细胞均占其总分裂细胞数的60%以上。这些多倍体植株的外部形态发生了显著的变异,如叶片显著增厚、叶色浓绿、叶脉增粗等。目前这些植株已进入无性系第2代和第3代筛选,其中最大的多倍体植株已高达2米,而且已开始出现多倍分枝。在试验研究过程中,我们发现采用秋水仙碱和激动素等诱导剂时,诱导当代芽条的第一蓬叶大多数属于嵌合体。至第二蓬叶时则几乎全部恢复正常(2n=36)。将当代第一蓬叶的嵌合体茎干进入无性第一代分离筛选时,约产生千分之一的突变芽,只有将这些突变芽继续芽接至第二代筛选时才能获得较多的多倍体植株,但这一代仍然有分离现象。分离出正常的植株约占30%。从无性第二代中再经细胞学鉴定,选出较纯的多倍体植株进行无性第三代筛选时,所获得的第三代植株几乎全部属于多倍体植株。

 
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