韧皮部

In the primary structure of root, the primary xylem is diarch and the development of both the primary xylem and the primary phloem is exarch.

在根的初生结构中，其初生木质部为二原型，木质部及韧皮部的发育均为外始式。

The cortical cells had thin walls and mitochondrium, and nucleus wassurrounded by chloroplasts, and vesicles were next to cell plasmalemma. However, cellwalls of velamen, cortex and exodermis in the mycorrhiza of D. nobile had ring orpapillary thickenings in many cases. The hyphae were surrounded by moremitochondria and vesicles of plant, and the hyphae were digested and their structure waschanged at last. The cell wall of endodermis also had typical ring thickenings, and manysieve orifices in sieve tube elements of phloem were covered by callose, while therewere liaison cords in a few sieve orifices.

金钗石斛菌根的根被细胞的细胞壁多处出现环形圈，外皮层细胞壁加厚，木质化，也有环形圈存在，皮层细胞细胞壁多角形明显，加厚，皮层细胞中存在被消化、失去结构的真菌菌丝，在菌丝周围有较多的线粒体、小泡，内皮层细胞的细胞壁呈现的典型的加厚及木质化环形圈，韧皮部筛管的筛板结构，绝大多数筛孔已为胼胝质所覆盖，仅个别筛孔中还存在连络索。

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。

The results showed that leaf shielding and half girdling could increase K content to some extent, but removing plastic film did not

打顶后烟株脚叶遮光或者顶部和脚叶均遮光的处理，以及茎基部韧皮部1／2环割处理都能提高烟叶含钾量

This study indicates that the new berry-cup technique can be used continuously to measure the accumulation of sugar in ripening grape berries, and also is an ideal method for studying the mechanism of sugar phloem unloading and influence of inside and outside factors on the accumulation of sugar in ripening grape berries.

结果表明新浆果杯法可连续测定葡萄第二生长期果实糖分积累，是研究葡萄韧皮部糖分卸载机理和内外因子对葡萄果实糖分积累影响的理想方法。

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。

Although their role in formation and deposition of cellulose microfibrils had been proposed, they may also performed a function in the lignification.

另外，在茎的部分基本薄壁组织细胞和韧皮部等未木质化的细胞壁中，过氧化物酶也同样表现出较强的活性，这说明在茎的不同组织中分布的这种酶，可能是几种不同功能的同工酶形式。

The structures of the two-year-old tap roots are similar to that of the one-year-old ones, while the periderm thickness is increased. In the secondary xylems of the two-year-old roots, the woody fibers are distributed in groups and the interxylary phellem appears. The vascular rays are multiseriate. Phellem cells surround a sclereid form the phellem cycle in the phloem nearby the periderm.

二年生黄芩主根的主要结构与一年生的基本相同，其不同之处为：二年生主根的周皮增厚，次生木质部中木纤维成群分布，出现木间木栓；维管射线为多列且明显；在近周皮的韧皮部内出现包围石细胞的木栓环组织。

Gibberellins can induce PARTHENOCARPY, and are used in the production of seedless fruits.

一般植物的根茎都可产生赤霉素并输送到木质部和韧皮部。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。