纹孔

对其导管分子上的侧壁穿孔板、多穿孔板和纹孔膜残余也进行了描述。

The lateral-wall perforation plates , multiple end walls and pit membrane vestige were also observed in the tracheary elements .

水分胁迫、冻害、病菌、机械胁迫、微生物引起的壁退化和纹孔膜的透性与空穴和栓塞的产生有关；

Factors related to the phenomena were water stress , freezing , pathogen , mechanical stress , microbial wall degradation and pit membrane permeability ;

通过光学数码显微镜和扫描电镜的观察，可以看到经超临界CO2流体处理后木材内的抽提物被浸提出，细胞壁上的纹孔膜被击破。

The extractives of wood solubilized and bordered pits destroy in tracheids were observed under a optics microscope scanning electron microscope after the woods were treated by SCF-CO_2 using benzene-ethanol as co-solvent .

形成层细胞阶段和伸展生长阶段，POD主要分布在径壁上，尤其是细胞壁角隅处和初生纹孔场附近的细胞壁。

POD was mainly distributed in the radial walls of the cambial cells and expanding xylem cell , especially at the corner of cell wall and cell wall close to the primary pit field .

垂周壁上具有纹孔的表皮细胞；

Epidermal cells with pitted anticlinal walls and finely striated cuticle ;

东北针叶树材交叉场纹孔扫描电镜观察

Cross-field pits of northeast coniferous woods observed by scanning electron microscope

具缘纹孔的发生和次生壁的构建；

The forming of pit bordered and secondary cell wall ;

交叉场纹孔为杉木型，2～6（8）个；

Cross fields are predominantly taxodioid with 2-6 ( 8 ) pits .

木材纹孔膜微孔尺寸与数目计算

Calculation of pit opening radii and number of opening in wood pit membrane

导管分子侧壁上的纹孔密度大。

The pit-membrane density on side wall was great .

长白鱼鳞云杉木材纹孔塞不同位置对渗透性的影响

Effect of Different Positions of Bordered Pit Torus in Yezo Spruce on Its Permeability

毛果冷杉湿心材的闭塞纹孔及细菌对木材结构的降解

Aspirated Pits in Wetwood and Micromorphology of Microbial Degradation of Sub - alpine Fir

导管分子穿孔板单穿孔，个别属梯形穿孔偶见，管间纹孔式互列；

Perforation plates simple , occasional scalariform in one genus , intervessel pitting alternate ;

交叉场纹孔长轴位置沿水平到垂直方向变化。

The long-axis position of cross field pits changed from horizontal direction to vertical direction .

利用高速搅拌的方法研究了通过纹孔将填料加入芦苇纤维细胞腔的技术。

A technique for forcing fillers into lumens of reed fibers through pits was studied .

泡桐为0%，62.2%，50.7%。4、树脂在泡桐内主要渗透路径是木射线，及射线细胞周围的纹孔，树脂在杨木内主要渗透路径是导管。

The main impregnation path in the poplar is vessel , but in Paulownia is ray .

电镜下发现湿心材部位管胞纹孔膜上存在水痕状、片状或块状的细菌，而在正常材部位却没有发现。

Bacterial , like flakily , water socked , and mass are found in pit membrane in .

管间纹孔式为互列纹孔式，导管射线间纹孔式为横列、纵列刻痕状纹孔式。

The intervascular pitting was alternate pitting and the gash - like pitting between vessel and ray .

由于其绝大多数纹孔塞偏离中央位置，气体渗透性较低，边材和心材分别为0.114和0.045darcy。

The permeability of air _dried sapwood and heartwood was as low as 0.114 and 0.045 darcy respectively .

初生纹孔场内有胞间连丝，显示细胞间已存在物质的共质运转。

The plasmodesmata in the primary pit fields indicate that a synplastic pathway is present between parenchyma cells .

远轴面长细胞的外壁，有许多园的或伸长的纹孔。

In the outer walls of long cells on the abaxial surface there are numerous round or elongated pits .

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。

The pits between the vessels and rays are mixed pits , pits with transverse gashes and scalariform pits .

其主要特征是配子体为多轴型，纹孔栓具双层帽，外层栓帽呈平板状。

Its thallus ( gametophyte ) is multiaxial , the pit plugs contain two cap layers and the outer one is plate-like .

外种皮石细胞较多，类多边形，木化，成团或单个散在，壁厚，纹孔沟明显；

Many agglomerate or single stone cells of exotesta been seen , polygon-like , lignified , wall thick . pit channel distinct ;

从管胞分子长度、管胞分子直径、射线高度、射线频率、纹孔类型、交叉场纹孔类型、交叉场纹孔数目等方面，比较了它们木材解剖特征的差异。

Wood anatomy characteristics including tracheid length , tracheid diameter , rays height and frequency , cross field pits types and numbers were studied .

具缘纹孔的闭塞率较低以及部分具缘纹孔周缘破裂是高频真空干燥后木材浸注性提高的主要原因。

Low pit aspiration ratio and cracks of some bordered pits are the main reasons for increasing liquid impregnation after radio-frequency vacuum drying treatment .

在次生壁形成的整个过程中，在降解的细胞质、凝聚的染色质、纹孔和运输小泡膜上一直存在Ca2+。

During the secondary wall formation , Ca ~ ( 2 + ) persisted in the disintegrated cytoplasm , agglutinated chromatin and pit channel and transfer vesicles .

其中有10种（隶8属、4科）木材维管间具缘纹孔膜具纹孔塞，其余不具纹孔塞。

Intervascular pit membranes with torns were found to be present in 10 species from 8 genera belonging to 4 families , but pit membranes were flat in the remainder .

利用直接碳复型和超薄切片技术，在透射电镜下观察了我国与种（隶28属、15科）阔叶树材的纹孔超微构造。

An electron microscopic study was undertaken on the pit structure of 15 families , 28 genera and 45 spelles in hardwoods of China using ultrathin section and direct carbon replicas .

而正常材大多数是非闭塞的，早、晚材的闭塞程度分别只有6.8%和13.4%。湿心材中大量存在的闭塞纹孔，是引起木材干燥困难的直接原因。

Most of bordered-pit membranes in normal wood are un-aspirated at green condition and the proportions of aspirated pits in early wood and latewood counted only 6.8 % and 13.4 % respectively .