查询词典 epidermis

Secondly, according to the stem and leaf anatomy, leaf epidermis, pollen morphology and floral development, it is found that there are no close relations between Acorus and Typhales, especially in the aspect of floral development. In the course of floral development of A. calamus, neither bracteloe primordium nor common primordium occurs in the whole course. Early development of the flower is strongly unidirectional. Three shield carpels develop into a pistil. In Sparganium fallax, each female flower has a bracteole. The bracteole primordium and the floral primordium originate from a complex structure. A single saccate carpel develops into a pistil. In staminate flowers, petal and stamen primordia initiate spirally.

菖蒲属与香蒲目的茎叶解剖特征、叶表皮特征、花粉特征及花器官发生特点等亦存在着明显区别，特别是花器官发生特点差异尤为显著，如菖蒲属花器官发生过程中，没有苞片原基，也不存在任何形式的复合原基，花被与雄蕊原基均以单向性方式发生，雌蕊由3心皮发育而成，具有&盾状心皮&的特点等，黑三棱属则有苞片原基发生，且苞片原基与雌花原基起源于共同的复合结构，雄花的花被原基和雄蕊原基均以螺旋状方式发生，雌蕊由单心皮发育而成，未发现有2或3个心皮原基或其痕迹的现象，体现出&囊状心皮&的特点。

Based on these characteristics observed, species in Pteridaceae tended to accumulate and deposit silica in long cells in lower epidermis and forming spicular cells. This might helps them to enhance the supporting function of their lateral veins.

综合以上特徵推测，凤尾蕨科倾向将二氧化矽堆积於叶下表皮与叶脉平行之表皮细胞上，并形成矽异形细胞，该特徵可能与加强叶片的支持力有关。

Squamate reptiles have a complicated shedding cycle and their epidermis have heterogeneous histological layers, but only the oberhautchen bears the repeating pattern of ornamentation.

有鳞目动物具有复杂的蜕皮循环，表皮层还具有复杂的组织学层次，然而只有最外面的角皮层有稳定的微细结构。

Squamate reptiles have a complicated shedding cycle and their epidermis have heterogeneous histological layers , but only the oberhautchen bears the repeating pattern of ornamentation.

中文摘要：有鳞目动物具有复杂的蜕皮循环，表皮层还具有复杂的组织学层次，然而只有最外面的角皮层有稳定的微细结构。

In most plants stomata are located mainly in the lower epidermis of the leaf, where evaporation rates are lower.

在多数植物中气孔主要分布于叶片的下表皮，因为该处的蒸腾作用较弱。

Stomata One of a large number of pores in the epidermis of plants through which gaseous exchange occurs.

每个气孔被两个新月形的保卫细胞头尾相接围绕而成。

Stomata : mainly at lower epidermis, for gases exchange and water loss by transpiration.

气孔 ：主要在叶底表皮，用作气体交换和水分的蒸发。

The results showed that leaf epidermal characters of the genus revealed a remarkable consistency: the leaf epidermal cells were usually polygonal and subpolygonal bearing with straight or arched anticlinal walls; and the stomatal apparatus was mainly anisocytic type and presented in abaxial epidermis of all studied species.

结果表明秋海棠属植物叶表皮形态在属内组间具有较大的相似性，表皮细胞为多边形或近多边形，垂周壁平直或弓形，大多数种类表皮细胞内具有晶体，气孔器仅分布于下表皮，且以不等型为主。

The results showed:(1) The histological changes of KC were in fact a wound-repair process;(2) The increased melanin in KC coordinated with "multi-overlapping screen" effect, a result of multiple layers of "supranuclear cap", was the direct cause of hyperpigmentation of the graft and (3) The hydrolytic disturbance of melanin in KC and the longer life span of the KC were probably the important reasons for the increase of melanin in the epidermis.

结果表明，角朊细胞的组织学改变实际上是一个损伤后修复的过程；角朊细胞内黑色素含量增加及出现的多层次的&核上帽&状分布而形成的&多重帘幕&效应，是皮片过度色素化的直接原因；黑色素在角朊细胞内的降解障碍及角朊细胞更新周期延长可能是表皮内黑色素含量增多的重要原因。

The results showed: four devices flower pollen sacs, anther wall conforms to the basic, from epidermis, the indoor wall, middle (2-3 layers) and tapetal composition tapetum to glandular type.

对悬铃木小孢子发生及雄配子体发育过程进行了观察，结果表明：花药具4个花粉囊，花药壁发育为基本型，由表皮、药室内壁、中层（2-3层）和绒毡层组成，绒毡层为腺质型。

So it was last week in Selma , alabama.

上星期在亚拉巴马州塞尔马市发生的事件也是这样一个转折点。

The group also spearheads various social programs in China.

该组织还带头参与中国的各种社会活动。