- 更多网络例句与叶的中肋相关的网络例句 [注：此内容来源于网络，仅供参考]
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The leaf anatomical structures of the mosses are of ecological adaptation to their habitats. The mosses wider dry conditions often have thickened laminal cell-walls on the surfaces, and some of them have appendiculate structures.
藓类植物叶的解剖结构具有生态适应意义，旱生环境下的藓类植物，叶片细胞胞壁具不同程度的增厚，有些藓类植物叶片具附属结构，藓类植物中肋的有无，反映了对水分吸收和运输方式的不同。
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The differentiation states of costae indicates the ways they absorb and transport water, and their ability adapting to the dry conditions, which was elucidated by the following examples: Brachythecium plumosum, because of its thin cell-walls in the costae and the absence of hydrome, assistant and steroid cells, can absorb water and nutrition under shady and moist conditions; Plagiomnium rostratum, though often grows in shady and wet condition, has hydrome and steroid cells, a feature similar to those of xeric mosses, which endows it to grow in the conditions with periodical drought stress during its life cycle; Hygrohypnum luridum is characterized by its slender leaves with only one layer of cells, the thin cell-walls, the absence of filaments on the leaf surface, and the fewer layer cells in the costae, the absence of hydrome and steroid cells. These features make it adaptable to aquatic environments. For Pogonatum inflexum and Atrichum undulatum, their ventral surfaces covered with lamella, while for Racomitrium japonicum, Thuidium cymbifolium, Macromitrium ferriei, Diphyscium fulvifolium, Barbula unguiculata and Ceratodon purpureus, their leaves are strongly mammillose or papillos. Such appendiculate structures made them adaptable to thy conditions.
例如，荫湿生环境下的羽枝青藓Brachythecium plumosum，其中肋细胞胞壁较薄，无导水主细胞和副细胞的分化，也没有厚壁细胞分化，能够在阴湿环境下吸收水分和养分；钝叶匍灯藓Plagiomnium rostratum具有与旱生藓类植物相似的中肋结构，叶片较厚，中肋具导水主细胞，中肋背面具厚壁细胞，这些特点使该种藓类植物能够分布于间隙性干旱胁迫的环境中；水灰藓Hygrohypnum luridum叶片纤细柔弱，仅1层细胞，细胞胞壁薄，叶表无附属结构，中肋细胞层数少，无导水主细胞分化，也没有厚壁细胞，这些特点使得水灰藓'能够生长在水生环境中；东亚小金发藓Pogonatum inflerum和波叶仙鹤藓Atrichum undulatum的叶腹面覆盖着栉片，东亚砂藓Racomitrium japonicum、大羽藓Thuidium cymbifolium、福氏蓑藓Macromitrium ferriei、东亚短颈藓Diphyscium fuhifolium、扭口藓Barbula unguiculata和角齿藓Ceratodon purpureus的叶片表面有乳头状突起或疣状物，这些附属结构使它们能够适应于旱生的环境中。
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The leaf structures of 17 mosses collected from different environmental conditions were transected and compared by means of paraffin wax section. The results showed that species vary much among the features such as the absence or presence of hydrome cells, the differentiation of steroid cells, the numbers of cell layer, the density of the costae, the numbers of laminal cell layer, etc.
使用石蜡切片法，对不同生境下的17种藓类植物的叶片进行了解剖观察和比较分析，结果表明不同种类的藓类植物在中肋导水主细胞的有无、厚壁细胞是否分化、中肋细胞层数及细胞密度、叶片细胞层数、叶表附属物、叶片细胞密度等方面存在显著差异。
- 更多网络解释与叶的中肋相关的网络解释 [注：此内容来源于网络，仅供参考]
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lid：盖
苔纲植物的营养体(配子体)为叶状体,或为有茎、叶分化的茎叶体,多有背腹之分,常为两侧对称;假根单细胞;叶不具中肋,细胞内叶绿体多数,无淀粉核;孢子体的构造简单,一般无蒴轴(columella)及蒴盖(lid)、蒴齿(peristome),具有弹丝;
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lobe：叶
三叶虫这个名称,来自於背甲纵向划分的三个"叶"(lobe),中间的"叶"我们称它为中轴(axis),两侧部分则称之为肋区(pleural region). 在中轴与肋区间,有凹下的轴沟(axial furrow)作为分隔. 三叶虫的横向也可分为三部分,
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cost push：成本推动的
cost-plus 在成本外加一定费用的 | cost-push 成本推动的 | costa 叶的中肋
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sphagnum：泥炭藓
藓纲(Musci)植物约3万种,我国1500种,叶常有1-2中肋(即叶片中央由狭长细胞形成的类似叶脉的构造),成熟的孢蒴多盖裂,常见的有金发藓属(Polytrichum),提灯藓属(Mnium),葫芦藓属(Funaria),泥炭藓(Sphagnum)等.
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Anthocerotales：角苔目
苔纲通常分为3目,即地钱目(Marchantiales)、叶苔目(Jungermanniaceae)和角苔目(Anthocerotales). 地钱除有性及无性生殖外,也有营养繁殖. 地钱的营养繁殖主要是胞芽(gemmae),胞芽生于叶状体背面中肋上的绿色芽杯(cupule)中.
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Funariaceae：葫芦藓科
葫芦藓Funnaria hygromentrica Hedw.属真鲜目(Bryales)葫芦藓科(Funariaceae)葫芦藓属. 植物体(配子体)高约2cm,直立,呈茎叶型,无真正的根、茎、叶的分化. 植株基部有单列细胞组成的假根. 叶螺旋状着生,叶片具中肋1条,整个叶片除中肋外由单层细胞组成,
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Marchantiales：地钱目
苔纲通常分为3目,即地钱目(Marchantiales)、叶苔目(Jungermanniaceae)和角苔目(Anthocerotales). 地钱除有性及无性生殖外,也有营养繁殖. 地钱的营养繁殖主要是胞芽(gemmae),胞芽生于叶状体背面中肋上的绿色芽杯(cupule)中.
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Psidium：番石榴属
[科属]:桃金娘科(Myrtaceae)番石榴属(Psidium) [特性与特征]:常绿小乔木或灌木,高5~番石榴的功效12m,没有直立主干,根系发达. 单叶对生,叶背有绒毛并中肋侧脉隆起. 花单生或2~3朵聚生叶腋,花两性,雄蕊多数,雌蕊1枚.
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costae：肋脉, 叶的主肋
costa || 肋, 缘, 中脉, 前缘脉 | costae || 肋脉, 叶的主肋 | costal brace || 前缘小脉(蜉蝣的翅)
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exine：外壁
试验前,先观察母株的孢子囊群,长度不超过叶片中肋到叶缘的一半,并在光学显微镜下观察孢子囊群是由二到三列的孢子囊排列而成,成熟的孢子在电子显微镜下可观察到外壁(exine)与单沟发芽孔(monolate).