保卫细胞

H〓O〓 was found to be involved in the signal transduction pathway of ABA inducing stomatal closure.

H〓O〓是最近两年发现的参与保卫细胞ABA信号转导的新成员。

The results indicated that chromosome counting was the most reliable and precise method, however, it was cumbersome and required skilled cytological techniques; The chromocenter size, heterochromatin number, chroloplast number of guard cell and certain plant morphological characteristics are simple and practical methods for ploidydetermination but with some shortages.

结果表明：对体细胞染色体的直接计数法是最可靠的方法，但费时、难度大；叶片气孔大小与倍性无显著相关性；保卫细胞叶绿体数目、体细胞染色中心大小以及异染色质个数与黄瓜倍性密切相关，是简单、快速而有效的倍性鉴定方法；植株的形态学观察也能间接确定植株倍性，但鉴定时期偏晚，精确性较差。

Under SEM, the cuticula membrane of the leaf epidermis is distinct, and granular, reticulate, scaly or papilliform in shape. The stomatal apparatus is of paracytic type and occurs only on the lower surface.

气孔器几乎全部生在下表皮，有些种气孔下陷，气孔器一般是一对保卫细胞和一对副卫细胞平列。

But the long axis between guard cell and epidermal cell are vertical.

但保卫细胞与表皮细胞的长轴相互垂直。

Guard cell regulates photosynthesis and transpiration, which play an important role in the life of plant, with their special cell wall structure.

保卫细胞以其特殊的胞壁结构调控着植物的光合作用和蒸腾作用，在植物生命活动中起着重要的作用。

Guard cell A specialized kidney-shaped epidermal cell, located to the side of a STOMA.

保卫细胞：是植物中一种特化的肾形表皮细胞，位于气孔两侧。

Other modifications include the uneven thickening of guard cells, the sieve plates in phloem, the suberization of endodermal cells, the waterproof coverings of epidermal and cork cells.

此外还有其他的一些修饰形式，包括不均匀的加厚保卫细胞和韧皮部中的筛板，内皮细胞的栓化等。

Excessive O(superscript – subscript 2) could lead to the damage of cytomembrane, and as a result, the cytomembrane permeability was increase finally. On the other hand, the two kinds of weedicide could damage cell construct, expand cell interspaces, and shrink the guard cell.

灭狼毒"和"灭棘豆都可以使狼毒和棘豆叶片栅栏组织排列呈疏松变化趋势，细胞间隙增大，叶肉细胞结构破坏，形成大的空腔；保卫细胞萎缩，气孔下腔增大。

Using count the leave.and flow cytometric to identifiy ploidy levels for the regenerated plants derived from antherculture in burley tobacco in this article,it shows that using count the chloroplast method could identify the ploidy levels simply and economic but it cannot identify the mixoploid accurately, so it easily lead to misidentify.

本文分别用气孔保卫细胞叶绿体计数和流式细胞仪两种方法来鉴定花药培养再生植株染色体的倍性，结果发现叶绿体计数法可以简单经济的检测烟草花药培养再生植株的染色体倍性，但它不能准确地鉴定出混倍体植株，易造成误判。

The significant differences existed in lower epidermis among materials:in 2 splitting-resistant cultivars,their anticlinal walls had clearly sinuous ridges and the periclinal walls had equal thick ornamentations of cuticles; the defensive cells were rounded cuticles of projected ridges,and epidermal cells were covered with dense powder.

材料间下表皮微形态存在较显著的差别：耐裂材料的垂周壁上有明显的波状嵴，平周壁上有加厚的条纹状角质层纹饰，保卫细胞四周角质层褶皱较多、起伏较大，表皮细胞上覆盖有大量的粉状或颗粒状蜡质。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。