- 更多网络例句与蕨类相关的网络例句 [注：此内容来源于网络，仅供参考]
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A variety of already extinct ferns such as the Lepidodendrales and Sigillaria stand tall and upright above the forests ad numerous ferns of grasses and trees cover the everglade of the marsh.
已经在地球上灭绝的鳞木、封印木等蕨类矗立于森林上层，无数草木蕨类覆盖在沼泽湿地上。
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Hsüopsida is parallel to the above three plant categories in Early Devonian and differs from them in that: the trimerophytes or Euphyllophytina have long fusiform sporangia terminating in trusses and P-type tracheids; the zosterophytes or Lycophytina are characterized by the exarch xylem; the rhyniophytes bear simple isotomous branches and S-type tracheids.
徐氏蕨类群与上述早泥盆世的三大类群并行，它不同于三枝蕨类或者是真叶植物的长纺锤形、成簇顶生的孢子囊和P-型管胞；不同于工蕨类或石松植物的外始式木质部；不同于莱尼蕨类植物简单的等二叉分枝和S-型管胞。
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In former classifications: comprising plants with a vascular system including ferns and fern allies as well as seed plants.
用于旧的分类中；由有维管的植物组成，包含蕨类和蕨类联盟以及种子植物。
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Fern species are usually distinguished by their leaf shapes, venations, scales, sporangia, and indusium, etc.
蕨类又分为真蕨和拟蕨两类；前者孢子囊生长在叶片，包括一般常见的蕨类；后者的孢子囊长在茎干上，包括其他石松科、卷柏科、水韭科及木贼科。
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The Rhynie Chert has been radiometrically dated at 396 Ma. Plants remains show excellent cellular preservation. Three groups of plants are represented: the Rhyniophytes, the Zosterphyllophytes and a lycopod.
莱尼碎石的同位素顶年结果为 3.96亿年，其中化石植物保存有精美的细胞结构，主要的植物代表类群有莱尼蕨类，工蕨类和石松类。
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The spore germination and gametophyte development of 21 ferns are studied. It indicates that :① the development period of prothallium and young sporophyte of the same species is different due to seeding time of spores;② the optimal temperatures of spores germination and gametophyte development of 21 ferns are about 15 -24 ℃;③ the rate of spore germination of rare ferns is much lower than the ferns which occur large populations in nature;④ the treatment with GA 3 can accelerate the germination of the spores;⑤ the prothallium changes from large to small, green to yellow when young sporophyte comes out. The prothalliums of all 21 ferns die away after the appear of the 3rd leaf of sporophytes;⑥ shapes of the 1st and 2nd leaves of the young sporophyte are different from those emerged later;⑦ spores cultured in dark can not germinate;⑧ a prothallium can develop only one young sporophyte though it has many archegoniums, and the spore propagation with leaf mould substrate is an economical method.
摘 要：以腐叶土为培养基质，对 21 种蕨类植物进行了孢子萌发和原叶体发育的研究，结果表明：①不同时期播种的同种蕨类的孢子，发育出原叶体和幼孢子体所历经的时间长短不同；②孢子萌发和配子体生长发育的适宜温度约为 15 ～ 24 ℃；③稀有蕨类的孢子萌发率低，而在野外能形成较大种群的蕨类的孢子萌发率高；④用 GA 3 处理孢子可以促进萌发；⑤当原叶体上长出幼孢子体时，原叶体由大变小，由绿变黄， 21 种蕨类的原叶体都在幼孢子体上长出第 3 片叶时消失；⑥幼孢子体上长出的第 1 、 2 片叶在形态上与以后长出的叶不同；⑦孢子萌发需要光；⑧ 1 片原叶体尽管有多个颈卵器，但仅发育出 1 株幼孢子体；⑨利用腐叶土进行蕨类孢子繁殖是一种经济实用的繁殖方法。
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So this research has a particular sigaifilance of physiological ecology. It is first reported that there are about 22 familias,38genera,67species (embrace 3 subspecies) of the wild Pteridophyte's and fern's spore mature period in this article.
但是 ，黑龙江省的蕨类，有着显著的特征∶大中型种类居多，生长周期短，生长速度快，往往形成大面积的群落，总贮量相当丰富，构成了黑龙江省独特的蕨类生态自然景观[5] 。
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The total DNA has been extracted from the fresh leaves of 4 medicinal species of pteridophyte with CTAB, SDS, to compare their effects on DNA extraction. The result shows that the optimum preparation method obtained to extract high-quality DNA lays theoretic and practical base for PCR amplification and primer design, for filtrating related gene of the active elements from leaves of the four pteridophytes.
以四种药用蕨类的叶片为材料，采用改进的CTAB法、SDS法分别对四种蕨类进行了总DNA提取效果的比较分析，结果表明，通过实验获得最佳的DNA提取方法，为PCR扩增，引物设计，为筛选四种药用蕨类中的活性成份的相关基因奠定理论和实践基础。
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This paper summarizes the appropriate range of some DNA sequences that are commonly used in current pteridophyte molecular phylogenetics, which comprises sequences from three plant genomes (chloroplast, nucleo-tide, and mitochondria), especially focuses on the usage of chloroplast DNA regions.
本文综述了目前蕨类分子系统发育研究中常用的DNA序列分析，它们分别来自叶绿体基因组、核基因组和线粒体基因组，着重阐明叶绿体基因在蕨类分子系统学研究中的应用。
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This indicate most of those kinds are mature from the midst of July to the midst of August,but the aquatic Pteridophyte delay twenty days,especially it is diffirent in Sphenopsids and Xeric spore.
这在研究蕨类生理生态、生长发育、开发抗旱抗寒观叶蕨类，以及筛选抗旱抗寒基因植物等，都有独特的研究价值。
- 更多网络解释与蕨类相关的网络解释 [注：此内容来源于网络，仅供参考]
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bracken heath：蕨类石南灌丛 羊齒石南灌叢
brachypterous form 短翅型 短翅型 Y | bracken heath 蕨类石南灌丛 羊齒石南灌叢 Y | brackish water 半咸水 微鹹水 Y
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fern：蕨类
这株看起来不像蕨类(fern)喔!应该是双子叶植物纲...大戟科的"叶下珠"!马茶花(学名Tabernaemontana divaricata)是夹竹桃科的植物(全株有毒),不是茶花(Lamellia)哟!这株看起来不像蕨类(fern)喔!应该是双子叶植物纲...大戟科的"叶下珠"!
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fernery：蕨类栽培地
fernbrake 羊齿植物丛 | fernery 蕨类栽培地 | ferny 蕨类的
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fernery：蕨类种植园
fern plot 蕨类种植园 | fernery 蕨类种植园 | ferns 蕨类
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fernery：蕨类丛生之处
fernene 羊齿烯 | fernery 蕨类丛生之处 | fernery 蕨类栽培地
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ferns：蕨类
另一血统发达具有维管束系而成为维管束植物(Tracheophyta)的祖先,此维管束植物包括有现生和绝灭(化石)的蕨类(ferns)、石松类、木贼类、针叶树类和被子植物.
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Eusporangiatae; eusporangiate fern; Eusporangiopsida：真囊蕨类;厚囊蕨类
真正有性的 eusexual | 真囊蕨类;厚囊蕨类 Eusporangiatae; eusporangiate fern; Eusporangiopsida | 有真正孢子囊的;厚囊蕨的 eusporangiate
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ferny：蕨类的
fernery 蕨类栽培地 | ferny 蕨类的 | ferocious 凶恶的
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Filices heterosporae：异型孢子蕨类
"蕨类植物门","Filicales;Filices" | "异型孢子蕨类","Filices heterosporae" | "同型孢子蕨类","Filices homosporae;"
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Filices homosporae：同型孢子蕨类
"异型孢子蕨类","Filices heterosporae" | "同型孢子蕨类","Filices homosporae;" | "蕨类植物门","Filices;Filicales"