主脉有3个维管束，排列成三角状。
致萎毒素可引起棉苗维管束系统堵塞。
Wilting toxins can induce to block the xylem of cotton seedling.
这已经用于附生藻类和沉水维管束植物中。
It has been applied to attached algae and submerged vascular plants.
这种维管束斜生于茎内的部分，称为叶迹。
These parts of bundles in the stem be regarded as leaf trace.
自花梗顶部至子房室基部，维管束系统发生复杂的变化。
The vascular system changed complexly from the top of the pedicel to the base of the locule.
根据萼片内的许多维管束结构，通常认为其由叶发育而成。
Sepals contain several vascular bundles, and are thought to be derived from leaves.
此外，两个种的维管束结构及叶缘结构等也有很大的差异。
The structures of vascular bundle and leaf margin were also different.
对两系杂交稻穗颈节维管束特征及其籽粒充实进行了研究。
The characteristics of vascular bundle of peduncle and grain-filling in two-line hybrid rice were studied.
维管束由维管束鞘、木质部、韧皮部和大型薄壁细胞组成。
The vascular bundle consists of vascular bundle sheath, xylem, phloem and big parenchymatous cells.
表明水分亏缺显著改变了小麦穗轴维管束系统的显微解剖结构。
It showed that the vascular bundle system of rachis in wheat changed apparently under water deficit.
穗颈维管束数主要受遗传因素控制，环境条件的影响相对较小。
The number of vascular bundles in neck-panicle was mainly controlled by genetic factors.
已知浙江有水生维管束植物150种，隶属于78属，42科。
There were 150 species belonging to 78 genera and 42 families in the province.
树叶掉下之后，留下一些细胞，形成一种被称作维管束痕的小牙。
When dead leaves break away, they leave behind waxy cells that form a small bud called a bundle scar.
结果表明，叶维管束内的大型薄壁细胞为芦荟素的主要贮存结构。
Results show that the large parenchymatous cells of vascular bundles are the mainly storage site of aloin.
解剖学方法观察发现，这些畸形胚的维管束系统不明显或形态异常。
The bundle system of these abnormal embryoids were unclear or abnormal shaped by dissect anatomy observation.
所有维管束都互相连通，因而得以迅速而有效地完成器官之间的运输。
All the vascular bundles are interconnected so that transport between organs carried on rapidly and efficiently.
每个维管束的韧皮部外面有数层厚壁细胞，增加叶柄的机械支持作用。
There are some sclerenchymatous cells outside the phloem of each vascular bundle to increase the supporting force of the petiole.
次生加厚分生组织起源于正常的散生维管束中柱外侧的薄壁组织细胞。
The secondary thickening meristem originated from the parenchyma cells, which were located the outside of the atactostele.
是初生木质部的内，外方都有初生韧皮部分布的一种维管束排列方式。
Bicollateral bundle the arrangement of tissues in the vascular bundles in which the phloem is situated on both sides of the xylem.
一种大部分为维管束植物石松属植物，通常与苔藓相似，通过孢子再生。
Any of various mostly small vascular plants of the genus Lycopodium, often resembling mosses and reproducing by spores.
它们的内部结构是由气道、不同大小的维管束、基本组织以及厚壁组织组成。
Their internal structures consist of air passages, vascular bundles of various size, ground tissues and sclerenchyma.
木质部在维管束植物中的起支撑作用和输水作用的组织，主要由管胞和管道组成；
The supporting and water-conducting tissue of vascular plants, consisting primarily of tracheids and vessels; woody tissue.
以生物制片和光学显微技术研究了尼泊尔马桑根瘤维管束的形态结构和发育特点。
Morphological structure and the development of nodular vascular bundles of Coriaria nepalensis Wall. were studied by microscopical techniques.
合欢种皮侧缘厚壁(薄壁)细胞层中有维管束，它为种皮的发育提供水分与营养。
The vascular bundles in stereid layer or Parechymatous cell layer of lateral margin of its testa provide the testa development with water and nutrition.
植物激素通过影响砧木和接穗间维管束桥形成的时间和数目调控嫁接组合的发育。
Plant hormones controlled the formation of graft unions through influencing the time and the number of vascular bridges formation between the stock and the scion.
叶柄的基本组织中具有裂生分泌腔，5~8束维管束呈弧形排列或散布在薄壁组织中；
There are 5~8 vascular bundles arranged in arch shape. Secretory cavities are present in the ground tissue of petiole.
根据15年的调查结果，对浙江省水生维管束植物的区系与地理分布特点进行了研究。
The floristic features and geographical distribution of aquatic vascular plants were summarized in Zhejiang Province based on 15 - year investigations.
针对胶州湾海岸湿地发生的退化现象，提出了保护胶州湾海岸湿地维管束植物的初步措施。
In light to the degradation of coastal wetlands in Jiaozhou Bay, some countermeasures were put forward to protect the vascular plants.
本文分析了该区维管束植物科、属的种类组成，阐述了构成森林的主要植物类群及其分布。
The composition of the species, genera and families was analyzed, and the main plant groups and their distribution were also described.
本文分析了该区维管束植物科、属的种类组成，阐述了构成森林的主要植物类群及其分布。
The composition of the species, genera and families was analyzed, and the main plant groups and their distribution were also described.
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