查询词典 xylem

Hsüopsida is parallel to the above three plant categories in Early Devonian and differs from them in that: the trimerophytes or Euphyllophytina have long fusiform sporangia terminating in trusses and P-type tracheids; the zosterophytes or Lycophytina are characterized by the exarch xylem; the rhyniophytes bear simple isotomous branches and S-type tracheids.

徐氏蕨类群与上述早泥盆世的三大类群并行，它不同于三枝蕨类或者是真叶植物的长纺锤形、成簇顶生的孢子囊和P-型管胞；不同于工蕨类或石松植物的外始式木质部；不同于莱尼蕨类植物简单的等二叉分枝和S-型管胞。

This bacterium is resided in xylem be used to, short staff state, sheet is unripe, provide the fasciculus outside the cellular wall of several winding and afterbirth, micron of 1.0-4.0 of size 0.25-0.50 ×, without flagellum, not move about, oxidation enzymatic negative, cross oxidation enzymatic positive, good oxygen, blame barmy, of the salt that be not be addicted to, colorless element is deposit, education is difficult, the requirement has special education base, if the ability such as BCEY, JD-3 grows.

该菌在木质部习居，短杆状，单生，具数层卷绕的细胞壁和胞外纤维束，大小0.25-0.50×1.0-4.0微米，无鞭毛，不游动，氧化酶阴性，过氧化酶阳性，好氧，非发酵的，非嗜盐的，无色素沉积，培养困难，要求有非凡培养基，如BCEY.JD-3等才能生长。

Any of various vascular plants,including seed plants and fern s,having a conducting system of xylem and phloem.

导管植物任何种类的维管植物，包括种子植物和蕨类植物，具有木质部和韧皮部导管系统

The correlation analysis indicated that the apple fruitlet weight was significantly positively correlated with the total Ca, Mg, K content of single fruitlet, and also with the diameter, number of vascular bundles, xylem thickness and phloem vascular bundles area of pedicel.

相关分析表明，苹果幼果的单果重和Ca、Mg、K含量与果柄的直径、维管束数目、木质部厚度、韧皮部维管束面积呈显著正相关，说明幼果发育与Ca、Mg、K吸收和果柄结构密切相关，Ca、Mg、K吸收率低和果柄发育不良可能是导致落果的重要原因。

After taking a study of morphological anatomy on the goosefoot nutritive organ, we foud the goosefoot 's xylem in the roots is developed and the caliber is big.

对藜的营养器官进行了形态解剖学研究，结果发现：藜的根中木质部发达，导管数量多，口径大

Water potential is also affected by capillary forces, especially in the narrow tubes of the xylem; and in the interstices of cell walls, and by imbibitional forces.

水势可以收到毛细管作用力的影响，在木质部的狭窄管道和细胞壁的缝隙中尤为明显；水势还会受到到液体吸力的影响。

Object To explore the method for high quality DNA extract from plant Chinese medicinal materials containing developed xylem Methods The process of DNA includes wash with Tris buffer, extract with CYAB buffer and purification mainly Results Using this method, the total DNA was isolated from Cimicifugae foelida L., Arlia chinensis L., Paeoniae lactiflora Pall.,Aucklandia lappa Decne.,Lindera aggregata Kostern., and Akebia quinata Decne.

目的 为获得高质量的DNA，研究木质部较发达的根，根茎类以及茎木类药材的DNA提取方法。方法总DNA的提取过程包括用Tris缓冲液洗净，CTAB抽提和纯化。

The leafstalk, chief vein, bud, the cane top on side branch, bast and xylem of type B had type A and C tow components, belonging to chimeric tissues. The leaf pulp and thin leaf vein had no components of type C, belonging to pure tissues of type A. Type B plant had two kinds of color roots, the rufous roots belonged to type A tissue, the yellow roots belonged to type C tissue through the SSR identification.

深州杨B型的叶柄、叶主脉、芽、侧枝茎尖、韧皮部、木质部同时检测到深州杨A、C型两种成分存在，属于嵌合组织，B型叶肉及细叶脉中检测不到深州杨C型成分，属于深州杨A型纯合组织；深州杨B型植株的地下部分含有红褐色和土黄色两种根，经检测，红褐色根是属于深州杨A型的纯合组织，土黄色根是属于深州杨C型的纯合组织。

Peroxidase's role in xylem cell wall formation and lignification was also discussed.

剥皮再生过程中形成层区域过氧化物酶的分布和活性变化。

The degree of lignification varies from slight in protoxylem to heavy in sclerenchyma and some xylem vessels, but values of 25-30% lignin and 50% cellulose are average.

不同部位的木质化的程度不同，原生木质部中只有轻微的加厚，而在厚壁组织和一些木质部导管中则进一步加厚，平均含25％-30％的木质素和50％的纤维素。

A historical region of southwest France between the Pyrenees and the Garonne River. The duchy of Aquitaine was joined with France after the marriage of Eleanor of Aquitaine to King Louis VII in1137, but its possession was disputed after her subsequent marriage to Henry II of England.

阿基坦法国西南部一个历史地区，位于比利牛斯山和加隆河之间，在1137年阿基坦的埃莉诺与国王路易斯七世结婚之后阿基坦公国加入法国，但当她再嫁英国亨利二世后，其归属权便受到争议

There are moments when I look at the smiling , happy faces of my expectant staff and wonder how they will cope when confronted by an outraged housemaster along with an unrepentant and recalcitrant bleached blond teenager in 18 years ' time .

有时候，我看着那些满怀期待的员工微笑，幸福的脸，想着当他们遇到一位愤怒的宿舍管理员和一位不知悔改，叛逆，而且将头发染成白色的18岁少年时，他们会如何处理。