- 更多网络例句与水龙骨属相关的网络例句 [注：此内容来源于网络，仅供参考]
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The result of factor analysis can provide the changes of relative precipitation and temperature variations. In trace elements, Cu, As, Zn, Pb and Ni were apparently enrichmented in soil layers and are sensitive to climatic changes. Carbon isotope is more sensitive to climatic changes than that of oxygen isotope in loess stratigraphy. The heavy mineral are varified in the loess stratigraphy, but their content differences between loess and palaeosol is little. Though the palynologic analyses results reveal that pollens and spores are fewer in the loess stratigraphy, they differ greatly in loess layer and palaeosol layer not only in species but also in types, i. e., the pollens and spores indicating warm and moist climate, such as Lles, Podocarpus, Polopydium, Pteris grerilliana Wall, Pterocarya and Juglans appear in palaeosol layers, while those indicating cold and dry climate such as Ephedra, Artemisia, Chinopodiaceae, Picea and Abies exist mainly in loess layers. The pollen content of broad-leaved tree mainly consisting of Pterocarya is up to 60% in palaeosol 〓, while the content of Ephedra is more than 50% in 〓 loess layer, showing that the environment differed greatly when 〓 and 〓 were formed.
当然，常量元素氧化物的组合因子分析结果可提供相对降水与相对温度在剖面的变化，因而来反映气候状况更为理想；微量元素中Cu、As、Zn、Pb与Ni在成土过程中富集明显，亦较好地反映了气候变化；稳定同位素中的碳同位素比氧同位素更能敏感记录气候的变化；研究区黄土地层中重矿物种类较多，但黄土层与古土壤层中含量差异不大；孢粉分析结果揭示，尽管研究区黄土层中孢粉总量相对较为贫乏，但黄土层与古土壤层中孢粉种属相差较大：在古土壤层内出现了指示相对暖湿环境的冬青属、罗汉松属、水龙骨属、林下凤尾蕨、枫杨、胡桃等植物孢粉，而黄土层中麻黄、藜科、蒿属及冷杉、云杉含量较高。
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Any of various ferns of the widely distributed genus Polypodium, having simple or compound fronds, round sori arranged in one or more rows along the midrib, and creeping rootstocks.
水龙骨属植物一种分布广泛的水龙骨属植物，有简单的或复合的厥叶，沿中脑以一行或多行排列的圆形囊群，和爬行的根状茎
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Any of various fern s of the widely distributed genus Polypodium,having simple or compound fronds,round sori arranged in one or more rows along the midrib,and creeping rootstocks.
水龙骨属植物一种分布广泛的水龙骨属植物，有简单的或复合的厥叶，沿中脑以一行或多行排列的圆形囊群，和爬行的根状茎
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Spores,the structure of leaf epidermis,the transverse section of stipes,the rhizome scales and the venation patterns were selected for study.Several of these characteristics were studied in detail for this group for the first time.Morphologically and phytogeographically,the phy...
结果表明，在该亚科植物类群中，主要分布于亚洲亚热带地区的篦齿蕨属、拟水龙骨属和水龙骨属的亲缘关系较近，而主要分布于亚洲热带地区的棱脉蕨属和亚洲温带地区的多足蕨属的系统位置则分别较孤立。
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One of a number of families into which the family Polypodiaceae has been subdivided in some classification systems; includes genera Blechnum; Doodia; Sadleria; Stenochlaena; Woodwardia.
在某些分类系统中细分的水龙骨科成员的一个科；乌毛蕨属；水龙骨属；狗脊属。
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An observation and analysis of series of characteristics coming from sixteen species belonging to five genera of Polypodiaceae subfam.Polypodioideae were undertaken in order to unravel the phylogenetic relationships within this group.
对水龙骨科水龙骨亚科5属16种植物的孢子形态、叶表皮结构、叶柄和根状茎的横切、根状茎上的鳞片以及叶脉特征进行了详细的观察和分析，探讨了该亚科植物的系统位置和亲缘关系。
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The spores of 8 species and 1 variety belonging to 4 genera of Polypodiaceae subfam. Polypodioideae in Yunnan, China were examined under LM and SEM. Of the species it is the first time to study the spores of Metapolypodium manmeiense and Polypodiastrum mengtzeense under SEM. The results show that the spores of this subfam.
利用光学显微镜和扫描电子显微镜对云南产水龙骨科水龙骨亚科4属8种1变种植物的孢子进行了详细观察，其中篦齿蕨Metapolypodium manmeiense以及扫描电镜下观察的蒙自拟水龙骨Polypodiastrum mengtzeense为首次报道。
- 更多网络解释与水龙骨属相关的网络解释 [注：此内容来源于网络，仅供参考]
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equisetum：木贼属
部分蕨类植物,如木贼属(Equisetum)、水龙骨属(Polypodium)等,根和茎顶端的单个顶端细胞,则与其衍生的许多细胞构成简单的顶端分生组织. 石松属(Lycopodium)、瓶尔小草属(Ophioglossum)等的茎端和莲座蕨属(Angiopteris)的根端,以及种子植物根和茎的顶端...
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Salvinia：槐叶苹
囊壁由一层细胞组成,具有各式环带,孢子囊通常集成孢子囊群.孢子囊内孢子有定数,32个或64个.少数水生蕨类形成孢子囊果,具有异型孢子.如水龙骨属(Polypodium)蕨(Pteridium),槐叶苹(Salvinia).(3)银杉属(Cathaya) 叶条形扁平,