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次生生长
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  secondary growth
     (2) secondary growth of albite on the original detrital feldspar;
     ②长石碎屑边缘钠长石次生生长;
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     cambium is located mainly between collateral phloem and xylem,the secondary growth is limited.
     次生生长时形成层主要存在于外韧皮部和木质部之间,为有限的次生生长
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     Studing the stem structure of the seedling of Platanus orientalis,the results revealed that the medulla of stem has parenchyma and the extremitas inferior of stem has less parenchyma,secondary xylem developed,but the extremitas superior of secondary growth is weak with developed parenchyma.
     研究悬铃木实生苗茎结构,实生苗茎髓部具薄壁组织,实生苗茎下端薄壁组织较少,次生木质部发达,而上端次生生长弱,薄壁组织发达.
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     ( c ) The root tubers show anomalous secondary growth.
     (3)块根具异常次生生长
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     The xylem parenchyma cell wall in roots of 2.47% salinity highly lignified and thickened,The secondary growth in high salinity was in advance and secondary structures developed.
     根中木薄壁细胞壁木质化加厚程度加强 ,次生生长提前 ,次生结构逐渐发达。
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  second growth
     The results reveal that, through controlling the light intensity, light duration and soil temperature, the Phen-ological phase and height growth rhythm of Mongolian oak can be apparently affected under different light conditions,and that in full sun Mongolian oak's sprouts exhibit the Phenomenon of second growth.
     结果表明,不同的光照条件通过对光照强度、光照时间及土壤温度的控制而明显地影响蒙古栎的物候期和树高生长节律。 观测的同时还发现,全光照下萌生蒙古栎幼树具有次生生长现象。
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  “次生生长”译为未确定词的双语例句
     Therefore, the roots mainly extend in the direction in which they are perpendicular to the two broad rays, and are oblate in appearance.
     与茎唯一不同的是根的异常次生生长为不均等的,在两个宽大的射线区外侧,没有异常的维管束形成,因此,根主要向着与两条宽大射线相垂直的方向扩展,故外形呈扁圆形。
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     This paper offers an introduction to the rondary growing prare of Eucommia ulmoides and the origin,the shaping course and its phisioledcal reaction of ropnerating new bark after being berked in large area.
     介绍杜仲树皮次生生长过程及大面积剥皮后再生新皮的起源、形成过程和树体生理反应。
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     Result showed that roots and stem apexes of Alnus sibirica seedlings formed in the first year grow rapidly and their secondary structures are complete, which manifest its cold resistant characteristics.
     结果表明:辽东桤木当年形成的实生苗根部、茎顶端部次生生长旺盛,次生结构完整,明显表现出抗寒性特征;
短句来源
     The results showed that the development of Bupleurum chinense DC. roots could be divided into four stages,promeristem,primary meristem,primary structure and secondary stages of growth.
     结果表明,北柴胡根的发育包括原分生组织、初生分生组织、初生结构和次生生长4个发育阶段.
短句来源
     The anomalous secondary thickening is by means of a succession of bidirectional cambia.
     其异常的次生生长是由维管柱外围发生的异常形成层通过正常的活动方式完成的。
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  secondary growth
Photochemical studies with a zeolite Y membrane formed via secondary growth
      
In this paper, we report on a zeolite Y membrane made by the secondary growth method.
      
It is therefore possible to study lignin degradation at the level of gene expression by comparing mRNA populations produced during primary and secondary growth in both wild-type strains and in strains mutant in lignin degradation.
      
Once anchored in the ground the roots begin secondary growth.
      
During primary and early secondary growth tracheid length varies with leaf internode length, but this relationship soon becomes obscured during later secondary growth.
      
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  second growth
Total height was measured at different developmental stages, and height growth components were measured after the second growth period.
      
After the second growth in presence of iso-leucine the intra- and extra-cellular protease activity was reversed, and thus showed a return to the starting situation.
      
The rate of autotrophic 14CO2 fixation measured in washed cell suspensions decreased markedly in this second growth phase on the addition of oxalate.
      
With low acetate concentrations, sufficient formate remained after the exhaustion of acetate to support a second growth phase on formate.
      
In mixtures of formate with glyoxylate or glycollate, the formate-oxidizing capacity was high, formate was oxidized rapidly, and no second growth phase was seen.
      
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The present paper observes and describes the differentiation of theprimary structure and the process of secondary growth occuring in the stemof Eucommia ulmoides. The stem apex of Eucommia ulmoides consists ofone-layered tunica and corpus. The differentiation of primary structure ofthe stem begins with the ground meristem which involves the cotex and thepith, while at the ring of procambium, the first primary vascular tissuesdifferentiate in three or four separate strands. At the successively laterstages of...

The present paper observes and describes the differentiation of theprimary structure and the process of secondary growth occuring in the stemof Eucommia ulmoides. The stem apex of Eucommia ulmoides consists ofone-layered tunica and corpus. The differentiation of primary structure ofthe stem begins with the ground meristem which involves the cotex and thepith, while at the ring of procambium, the first primary vascular tissuesdifferentiate in three or four separate strands. At the successively laterstages of development as more and more of the strands may be differentia- ted in the vascular region. the primary vascular tissues have developedinto rings as a result. According to Esau, the primary vascular system ofthe stem of Eucommia ulmoides is a traces system, while at the same timethe structure of the stem nodes prossess the features of unilacunar gap andone trace. When the primary structure has completed its differentiation inthe stem of Eucommia ulmoides, the epidermis begins to be transformedphellogen, producing first periderm. At the same time, cell division takesplace in the vascular cambium as well, thus producing the secondary vascu-lar tissues. Before the growth season comes to a close, the secondarystructure has become the principal part of the stem of Eucommia ulmoides.

本文对杜仲茎内初生结构的分化和次生生长过程进行了观察描述。杜仲的茎端是由原套和原体组成,原套为一层细胞。茎的初生结构的分化开始于皮层和髓二部分基本分生组织,而原形成层环首先在3—4个分散的束内分化出初生维管组织,在以后的发育过程中,由于分化出更多的束,使初生维管组织联接成环状。参照Esau的观点,杜仲茎的初生维管系统应属于叶迹系统,而其节部结构的特征为单叶隙、单叶迹。在杜仲茎内初生结构分化完成时,其表皮即转变为木栓形成层,产生第一次周皮,此时,维管形成层也开始细胞分裂,产生次生维管组织,因此,在生长季结束时,茎内次生结构已成为主要部分。

The epigeal portion of the gynophore has a typical herbaceous stem structure.It is found that the young gynophore is composed of epidermis,cortex and vascular cylinder. Periderm,lenticelle and secondary vascular tissue in the gynophore are produced due to its secondary growth.The region of cell division in the gynophore is located at 0.9—1.9 mm from the peg apex,and that of cell elongation at 2.0—4.5mm.These two regions are found to overlap at 2.0—2.5mm from peg apex. The results of the experiment exhibit clearly...

The epigeal portion of the gynophore has a typical herbaceous stem structure.It is found that the young gynophore is composed of epidermis,cortex and vascular cylinder. Periderm,lenticelle and secondary vascular tissue in the gynophore are produced due to its secondary growth.The region of cell division in the gynophore is located at 0.9—1.9 mm from the peg apex,and that of cell elongation at 2.0—4.5mm.These two regions are found to overlap at 2.0—2.5mm from peg apex. The results of the experiment exhibit clearly that the growing region of the gynophore grows toward the gravitional direction of the earth when the gynophore is placed either in a vertical position or in a horizontal position,thus the elongating gynophore shows a positive geotropic response.The distributed position of starch grains in the pith parenchyma sedi- mented to the side of cell wall near the earth surface.All this shows that there is a close relation between the positive geotropic growth of the peanut gynophore and the distribu- tion of starch statoliths in the pith of the gynophore under the influence of gravity.

幼嫩的子房柄包括表皮、皮层和维管柱三部分;次生生长后产生周皮、皮孔和次生维管组织。子房柄的细胞分裂区位于距果针顶端0.9—1.9mm 处,而细胞伸长区则位于距果针顶端后2.0—4.5mm 处,这两个区域在果针顶端以后的2.0—2.5mm 之间重叠。子房柄直放或横放都向地生长。子房柄薄壁细胞中的淀粉粒分布在靠近地面的细胞壁上,可以认为子房柄的正向地性生长与细胞的淀粉平衡石分布有密切的关系。

In the stem of Gnetum montanum Mgr.the general arrangement of va- rious tissues and its pattern of secondary growth are very similar to those of angios- perms.The most conspicuous similarity lies in that the xylem contains vessels and the phloem,sieve elements and“companion cells”. In climbing species of G.montanum,secondary growth initiates in a normal manner which is followed by the development of new combium at various loci among the par- enchyma cells towards the periphery of each bundle.It does not initiate...

In the stem of Gnetum montanum Mgr.the general arrangement of va- rious tissues and its pattern of secondary growth are very similar to those of angios- perms.The most conspicuous similarity lies in that the xylem contains vessels and the phloem,sieve elements and“companion cells”. In climbing species of G.montanum,secondary growth initiates in a normal manner which is followed by the development of new combium at various loci among the par- enchyma cells towards the periphery of each bundle.It does not initiate from the phloem parenchyma which is in agreement with the findings of Pearson(1929)and Maheshwari etc.(1961).Gradually these loci become incorporated into a continuous cylinder,producing a normally oriented ring of xylem and phloem separated by broad medullary rays.The growth of the first ring ceases at the commencement of the fur- ther formation of the outer,successive rings.

买麻藤(Gnetum montanum Mgr.)茎的各类组织的排列与被子植物的茎非常相似,其次生生长也属同一类型。其中最明显的相似之处,是木质部中的导管和韧皮部中的筛分子与“伴胞”。藤本植物买麻藤,正常的次生生长开始后,由每一维管束外侧的薄壁组织经脱分化产生新的形成层,以后逐渐形成一圈维管束。这与前人所描述的新形成层来自韧皮薄壁组织是不同的。异常的维管束与正常的一样,由木质部和韧皮部组成,并被髓射线分隔呈楔形。当第一轮维管束停止生长以后,在其外围以同样方式形成新的一轮,以后并可连续形成多轮。

 
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