裸植代 的英文怎麼說
中文拼音 [luǒzhídài]
裸植代
英文
paleophytic-
The occurrence of haploid endosperm in the gymnosperms provides a sound basis for further investigations into progenies.
裸子植物中單倍體胚乳的存在，為進一步對於後代的研究提供良好的基礎。The gymnosperms of jiangxi province interacted with areas being connected with jiangxi province through nanling mountains, wuyi mountains and luoxiao mountains, the similarity coefficient indicates that there is close relationship between gymnospermous flora of jiangxi province and those of southern china or central china or southeasten china ( similarity coefficient above 50 % ), while far relationship between jiangxi and shanxi province ( northern china ) ( similarity coefficient 6. 1 % )
江西現代裸子植物通過南嶺山脈、武夷山脈和羅霄山脈等與周邊地區聯系密切，相似性系數顯示江西裸子植物區系與華南、華中、西南聯系密切（相似系數皆大於50 % ） ，與華北比較疏遠（相似系數為6 . 1 % ） 。In most modern classifications they are placed in the class psilopsida of the filicinophyta
在大多數現代分類系統中，它們被分為真蕨植物門裸蕨植物亞門裸蕨綱。With the development of modem biological science and technology, great progress has been made in tissue culthe as an importam means of science study ginkgo is a gymnosperm, so its tissue culture is especially hard. at present, the research aboot ginkgo tissue culture and genetic transformation was limited and it has not been reported abollt its success, so it is very necessary to establish ginkgo regeneration system
隨著現代生物技術的發展，植物組織培養作為一種重要的研究手段取得了可喜的進步，裸子植物銀杏組織培養尤其困難。但目前銀杏組織培養和遺傳轉化的研究並不多，成功的例子還沒有。建立一個銀杏的高頻高效再生體系已是刻不容緩的事。Ginkgo biloba, which is now unique in ginkgopsida, is referred as a " living fossil " plant. as a wild species, ginkgo biloba is native to china
銀杏（ ginkgobilobal . ）是裸子植物銀杏綱中唯一現存的中生代孑遺植物，在中國具有悠久的栽培歷史，種質資源豐富，具有重要的經濟價值和植物系統學價值。In many gymnosperms the nuclei divide within the pollen grain to produce a small number of cells ( 2 - 40 depending on the group ) representing the male prothallus
在許多裸子植物中，細胞核在花粉粒中分裂以產生少量的細胞（ 2 40個，取決于不同種類） ，代表雄性原葉體。分享友人