- 更多网络例句与具导管的相关的网络例句 [注：此内容来源于网络，仅供参考]
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The wood structures of Lauraceae were characterized by most diffuse porous; most pores solitary, less multiple and cluster pores; simple and scalariform perforation with few bars; most solitary pore; alternate intervessel pitting; most of rays multiseriate, less uniseriate; all of rays heterogeneous, mostly heterogeneous Ⅲ and Ⅱ type rays; most of axial parenchyma paratracheal type, less banded or marginal type; oil cell and mucilage cell in axial parenchyma cell or ray cell; mostly fiber tracheid and libriform fiber, less septate fiber.
结果表明：除檫木外，其它木材的管孔分布均为散孔材，具较高的单孔率；导管分子穿孔板兼有单穿孔和梯状穿孔2种或者仅具有单穿孔；导管间纹孔式为互列；导管－射线间纹孔式类型丰富，主要为刻痕状和大圆状。木射线有单列和多列射线2种类型，单列射线稀少、短，多列射线数量多；射线组织主要为异形Ⅲ和异形Ⅱ；轴向薄壁组织以傍管状为主，少数有带状或轮界状。油细胞和粘液细胞普遍存在于射线薄壁细胞或轴向薄壁细胞中。木纤维由韧性纤维和纤维管胞组成，部分树种具分隔纤维。
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A few apomorphic character states, such as simple perforation plates, helical thickenings in secondary walls of vessels and septate fibers, can be found in Schisandraceae, which make this family a mosaic with both plesiomorphic and apomorphic character states.
此外，该科木材还具有单穿孔板导管、导管次生壁具螺纹加厚、具分隔纤维等较为特化的性状状态，这种性状进化水平的异等级现象，使五味子科表现出不同进化水平性状的镶嵌组合。
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According to the observation of the microstructure of small diameter lumber with scan electron microscope, there are many bordered pits of the radial trancheidal wall in the small-diameter Larch, and most of them have pit film. The resin is not only in resin canal, but also in some trancheid and ray parenchyma cells. The drying defects of small-diameter Larch lumbers were the most severe in consecution heating, fluctuating-heats 2h in between, and drying defects were nearly not observed in fluctuating-heats 6h. There is tylosis in the vessel of the heartwood of small-diameter Cathay poplar. The bordered pits of the radial trancheidal wall are dense, and the pits between vessels are alternate, most of them have pit film. Different collapse happened in all the small-diameter Cathay poplar lumbers. The collapse of small-diameter Larch lumbers was the most severe with consecution heating, fluctuating-heats 2h in between, the least with fluctuating-heating 6h.
通过扫描电镜观察发现，小径木落叶松的径壁具缘纹孔数目较多，且多具纹孔膜，小径木落叶松除在树脂道中含有树脂外，在一部分管胞胞腔内以及一些木射线细胞中也含有树脂，在产生缺陷的小径木落叶松锯材中，连续加热方式下锯材的开裂缺陷最为严重，波动2时次之，波动6时几乎没有开裂现象；小径木大青杨心材导管中的层状浸填体含量较多，且径壁具缘纹孔较为密集，管间纹孔呈互列方式，绝大多数纹孔具有纹孔膜，干燥后的小径木大青杨锯材均有不同程度的皱缩现象产生，其中连续加热干燥试验锯材的皱缩现象最严重，波动2时次之，波动6时干燥试验锯材的皱缩缺陷最小。
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This paper made a systematic research on Lonicerafulvotomentosa Hsu et S.C. Cheng, which grows well inkarst areas, from its biological characteristics, such asmorphology, growth and physiology. The main conclusions asfollows:(1)From the viewpoint of morphological anatomy, it hastypical xerophyte structures such as well-developed epidermisand tissues that transport water effectively, small leaf area,dense floss under the leaf surface, high stoma density, thesmall opening degree, thick cuticle, well-developed xylem andpalisade tissues, etc. The pollen of L. fulvotomentosa isseems to be spherical, and has 3 grooves, much bulge on theepidermis evenly. The shape of pollen is an important featureon taxonomy. The ripe fruit has from 1 to 18 seeds, some fruitbranch has 135 berry, its diameter is up to 0.8 centimeter.(2)From the viewpoint of growth, L.
本文从形态解剖、生长发育的节律、光合生理特性以及种子萌发生理等生物学特性方面对喀斯特适生经济植物黄褐毛忍冬进行了较为系统的研究，得出以下结论：(1)在形态解剖上，黄褐毛忍冬根茎中含有发育良好的周皮和输导组织，导管密度大，横截面宽，周皮的形成具有节制蒸腾、通气作用和保护组织免受外界环境影响的作用，宽的导管对水分的输导效率高；叶片密被绒毛，面积较小，气孔密度大、开度小，厚的角质层和发育良好的木质部和栅栏组织等是典型的旱生结构；黄褐毛忍冬花粉近球形，具3 孔沟，表面具均匀分布的小刺，刺间具网状纹理。
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There were some important discovery in structure character as the follows: in sarcotesta that materials making experiment, all possessed the structure of bandshape and like primary thickening meristem; sarcotesta possessed amphivasal vascular bundle and the vascular bundle that xylem distribute in two sied of phloem on inside and outside were discovered; new structure patterns of root that possessed more plentiful secondary cortex etc.
其中，发现外种皮中均具明显的似初生增厚分生组织的带状结构；且发现在外种皮的组织中具有双木维管束及周木维管束，发现了苏铁科植物根具较丰富的次生皮层等新的结构形式；在对比材料鳞秕泽米铁的羽片中发现了导管，这些在苏铁植物方面过去均未见有报道。
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Emblica have many different forms and most of them have tails and their perforation plates divide into two types:(1)there is one simple perforation plate at each end of the vessel elements and (2) there is one simple perforation plate at one end of the vessel elements and two simple perforation plate at the other end;(3)a few vessel elements have special inclusions;(4)the intervascular pits are alternate pits;(5)the pits between the vessels and rays are mixed pits ,pits with transverse gashes and scalariform pits.
结果发现，余甘子次生木质部导管分子中存在着许多不同的样式，导管分子大多数具尾；其穿孔板存在着两种类型：(1)两端均为1个单穿孔板；(2)一端为1个单穿孔板；另一端为2个单穿孔板；(3)极少数的导管分子具有特殊的内含物；(4)管间纹孔式为互列纹孔式；(5)导管射线间纹孔式为混合型纹孔与横列刻痕状纹孔以及梯状穿孔。
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The antiquity of Schisandraceae is supported by the presence of single vessel, scalariform perforation plates with many bars, scalariform vessel pitting and heterogeneous rays.
在五味子科中发现木材导管单生、具梯状穿孔板、导管壁具梯形排列的纹孔以及木射线异型等原始性状，支持五味子科在被子植物中的原始地位。
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The study reveals that the secondary xylem of 6 mangrove species of Sonneratia possesses the following characteristics:the diameter of vessel is small,the distribution frequency of vessel is high,the reperforating rate is high,the wall of vessel is thick,the wall of fibre is relatively thick and the wood parenchyma is short or sparse,whish is suitable with the environment.
应用光镜及扫描电镜对生长在热带、亚热带海岸潮间带的 6种海桑属红树植物的次生木质部进行了解剖学研究表明：海桑属 6种红树植物的次生木质部具有导管直径小，导管分布频率高，复孔率高，导管壁厚和纤维壁较厚且具次生加厚，木薄壁组织缺乏或稀少等与环境相适应的特点。
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Ten paired suprafascial and subfascial flaps were harvested, the radial arteries were cannulated, and methylene blue dye was injected into the radial artery followed by a barium sulfate/gelatin mixture.
12具新鲜尸体上取下24个桡侧前臂皮瓣。10对取下的筋膜上和筋膜下皮瓣，桡动脉被插入导管，蓝色亚甲基染料和硫酸钡混合后被注入血管内，对皮瓣行数字化摄影，用软件来测量血管分布区。
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The root,stem and leaf of all species possess vessel,indicate that cycads possessing vessel is an universality.
在所研究的所有种类的根、茎、叶材料中全部发现了导管，即存在导管具普遍性。3。
- 更多网络解释与具导管的相关的网络解释 [注：此内容来源于网络，仅供参考]
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manubrium：垂管
伞的中部向下伸出一根长的垂管(manubrium),垂管通常四棱柱状,末端具4片像裙边散开的唇,中央为口. 口直通里面的肠腔. 肠腔又与自伞中部向四面辐射的四根辐管,和沿伞下方周缘的一根环管相联. 五条白色的导管(一条自伞的中部向下伸出垂管,
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pitted vessel：纹孔导管
pitted thickened cell wall 具纹孔并有增厚的细胞壁,具纹孔并有增厚的细胞壁 | pitted vessel 纹孔导管 | pitted wear 麻面磨损
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primary xylem：初生木质部
(2)初生木质部(primary xylem): 根的初生木质部一般由导管、管胞、木纤维及木薄壁细胞组成,其主要功能是输导水分和溶质. 初生木质部具数目不同的辐射状棱角(初生木质部脊、木质部束),在横切面上,整个木质部的形状似星芒状,
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Dillenia：五桠果属
中国有五桠果属(Dillenia)及锡叶藤属(Tetracera)两个具有离生心皮而且比较原始的属. 亲缘关系:科的心皮离生,雄蕊螺旋排列,导管顶壁具阶状穿孔,木质线细胞异型等特征,表现出它和木兰目(Magno-liales)有一定的联系. 此外还与山茶目有亲缘关系.
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Isoetales：水韭目
石松部(Lycophyta)水韭目(Isoetales)水韭属(Isoetes)蕨类植物的统称. 约60馀种. 多原产於北美北部和欧亚大陆多沼泽、寒冷的地区. 形小,叶禾草状或翮状,螺旋排列,具中央导管和4个通气道,中有横隔分成数腔,叶基处有叶舌. 茎球茎状或块茎状,
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Isoetes：水韭属
形小,叶禾草状或翮状,螺旋排列,具中央导管和石松部(Lycophyta)水韭目(Isoetales)水韭属(Isoetes)蕨类植物的统称. 约60馀种. 多原产于北美北部和欧亚大陆多沼泽、寒冷的地区. 形小,叶禾草状或翮状,螺旋排列,具中央导管和4个通气道,
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Piperales：胡椒目
或常有大的胚和很少的胚乳或无胚乳......2.樟目(Laurales)5.花具极退化的花被或无花被,常簇生形成肉穗状花序,胚珠大多数直生;植物体不含马兜铃酸(aristolochic acid);种子常具外胚乳......3.胡椒目(Piperales)6.水生植物,导管缺(在莲属Nelumbo的根中除外);
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scalariform vessel：梯纹导管
特别是 Myodocarpus 属,具有如伞形科植物那样的双果爿(bicarpellate)和中央 心皮柄的分果(schizocarp),但又具有五加科那样的花序和营养体结构, 它的木材是比较原始的,具梯纹导管(scalariform vessel),管壁有 7-本目包括山柳科(Clethracea
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soft wood：软材
麻黄科(Ephedraceae)的麻黄Ephedra sinica;千岁兰科 (Welwitschiaceae)的千岁兰 Welwitschia mirabilis等具导管),在横切面上不见管孔. 商业上称针叶树材为软材(soft wood),阔叶树材为硬材(hard wood),但不能说明木材的性质.