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- Thread, hole patterns and Reticulate smaller catheter and tracheid. 见放射状条纹。See radial stripes.;螺纹、孔纹和网纹导管及管胞较小。
- Tracheid An elongated xylem conducting element with oblique end walls. 管胞：具有倾斜端壁的延伸的木质部运输分子。
- Tylose A bladderlike ingrowth from a parenchyma cell into an adjacent tracheid or vessel through a paired pit. 侵填体：薄壁细胞向内生长的泡状物通过纹孔伸入相邻的管胞或导管形成的结构。
- Spur of the great marrow, pulp tissue is often full of thick red crystal, tracheid also larger. 所以，仔细观察这些痕迹，可以对该铃技的年龄及历年的生长结实状况作出初步判断。
- Vascular bundle have not cambium layer, vessel, and spiral tracheid as well.Only sieve element. 维管束无形成层，无导管，也不具有螺纹管胞，只有筛分子。
- Fiber-tracheid An elongated cell with bordered pits found in wood, intermediate in form between a fiber and a tracheid. 纤维管胞：木材中具有具缘纹孔的细长细胞，是纤维和管胞的中间类型。
- A kind of silicified fossil wood with mixed pits on the radial tracheid wall is described. 报道了一种具混合型纹孔(互列式纹孔和对列式纹孔)的化石木。
- It fills the blanks in the study on the vasiform mic- rofossils in Dengying Formation, Sinian System, and sheds a light on the re- search of the formation and evolution of Late Precambrian to earliest Camb- rian shelly animals. 它的发现是继湖北房县下寒武统西蒿坪组和峡东地区震旦系陡山沱组发现瓶状微化石之后的又一新产地和层位,填补了震且纪灯影期该类化石的空白,对探讨由晚前寒武纪束期至早寒武世早期的带壳生物的发生和演化具有重要意义。
- It is thought to act like a valve, sealing the pit when the pressure on the two sides is unequal, e.g. when an adjacent tracheid is damaged. 它的作用相当于一个瓣膜，当纹孔两侧的压力不相同时，可以封闭纹孔。例如：当邻近的管胞被破坏就会出现压力相异的情况。
- The prophase variation curve of proportion of tracheid appeared as "Trapezoid" and the latter variation curve appeared as "V" from pith to outward. 树脂道比量由髓心向外，开始缓慢下降，然后迅速上升达最大值后又迅速下降。
- The relationship between the proportion of wood ray, the proportion of resin and the proportion of tracheid was significant. 术射线比量、树脂道比量和管胞比量都受到中等水平的遗传控制，无性系重复力分别是：0.;571、0
- Among the seed sources the timber air-drying density, mechanics intensity and the tracheid wall ratio were not significant different. 湿地松不同种源木材气干密度、抗弯强度、抗弯弹性模量、顺纹抗压强度与冲击韧性的广义遗传力分别为0.;3927、0
- Genetic variations of growth traits, wood basic density and tracheid length of Chinese fir clones were investigated in this paper. 摘要对杉木无性系生长性状、木材基本密度和管胞长度的遗传变异进行了研究。
- The transition age between the 2 wood zones was at the 25th growth ring for red pine specific gravity arid at the 33rd growth ring for Taiwan red-cedar tracheid length. 其林龄，红松以比重方法求得者为25年，台湾红桧以管胞长决定者为33年。
- In this paper, 12 years old Chinese Fir clones were studied on the genetic variation of growth properties, basic density and tracheid morphological characteristics. 本文综合研究了12年生杉木无性系试验林的生长性状、基本密度和管胞形态的遗传变异规律。
- Longer tracheid length，bigger tracheid diameter，thicker tracheid walls，smaller microfibrillar angles are the characteristics of the mature wood compared with those of the juvenite wood. 池杉成熟材的管胞长度、直径、壁厚比幼龄材大，纤丝角小；
- The tracheid wall in stems appears convexo-concave, and some tracheids are forked or branched. 茎中管胞的侧壁呈现凹凸不平,部分管胞具有分枝或分叉现象。
- tracheid morphology characteristics 管胞形态特征
- Tracheid double wall thickness-diameter radio 壁腔比
- THE FLOW-RESISTOR AND GAS PERMEABILITY OF SOFTWOOD TRACHEID 针叶树材管胞气体渗透流阻及其渗透系数
