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   细胞胚胎学 的翻译结果: 查询用时:0.273秒
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细胞胚胎学
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  cyto embryological observation
     Cyto embryological observation from emasculated flowers of genotype HS 86-11 showed it behaved psedogamous facultative apomictic reproductive type. It's characteristics were as follows. (1)Both sexual and apomictic embryo sacs were co existed which belonged to facultative apomixis.
     通过对基因型HS 86- 11去雄穗细胞胚胎学观察发现 ,该基因型具有兼性无融合生殖假配合特性 ,表现在 :( 1)有性生殖胚囊与无融合生殖胚囊同时存在 ,属于兼性无融合生殖类型。
短句来源
     Consecutive cyto embryological observation was made on a facultative apomictic genotype HS 86-11 in common wheat.Results were as follow:(1). Meiosis did happen during the megaspore mother cell (MMC) initiation to young embryo sac formation.
     对普通小麦兼性无融合生殖基因型HS 86 11细胞胚胎学连续切片观察 :在胚囊形成过程中 ,从造孢细胞出现至八核幼小胚囊期 ,行有性生殖。
短句来源
  cell embryology
     A STUDY ON CELL EMBRYOLOGY OF RICE 84_15
     水稻84-15细胞胚胎学的研究
短句来源
     STUDIES ON CELL EMBRYOLOGY AND DYNAMICS OF STARCH DURING SOMATIC EMBRYOGENESIS OF WHEAT(TRITICUM AESTIVUM L.)
     小麦组织培养中体细胞胚胎发生的细胞胚胎学及淀粉消长动态的研究
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  “细胞胚胎学”译为未确定词的双语例句
     Cytoembryological and morphological characterization of a polyembryonic mutant Brassica napus twn-119
     甘蓝型油菜胚柄多胚突变体(Brassica napus twn-119)的细胞胚胎学研究
短句来源
     Cyto embryological Study on Emasculated Florets of Genotype HS 86-11 in Wheat(Triticum aestivum)
     基因型HS86-11去雄穗细胞胚胎学观察
短句来源
     Cyto-embryological Study of the Apomixis of the Monosomic Addition Line M14 in Sugarbeet
     甜菜单体附加系M14无融合生殖的细胞胚胎学研究
短句来源
     CYTOEMBRYOLOGICAL STUDIES ON POLYEMBRYONIC LINE SB 1 OF ORYZA SATIVA: POLYEMBRYONY AND ITS ORIGIN
     多胚水稻品系SB-1的细胞胚胎学研究:多胚及其起源
短句来源
     A Cytoembryological Study on Rice 84-15, a Rice Line Presumed to be Apomictic
     水稻84-15的细胞胚胎学研究——兼论无融合生殖问题
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  相似匹配句对
     Hubbard) under light microscope by using the method of routine paraffin sectioning and whole ovary stain clearing technique.
     Hubbard作了细胞胚胎学研究。
短句来源
     A cytoembryological study on apomixis in walnut ( Jugians regia L.)
     核桃无融合生殖的细胞胚胎学研究
短句来源
     Tom Clancys Splinter Cell
     细胞分裂
短句来源
     Embryology of Tussilago farfara (Asteraceae:Senecioneae)
     款冬的胚胎学
短句来源
     2. basal cell;
     基细胞;
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Polyploid lavender has been induced by the use of colchicine treatment. Com-parative studies on morphological and biological characteristics and cytoem-bryology have been made for the man-made tetraploid lavender (2n=88) with the diploid lavender (2n=44) as control.

本文叙述了用秋水仙碱引变熏衣草多倍体的方法,并对人工获得的四倍体熏衣草(2n=88)和对照的二倍体熏衣草(2n=44)进行了形态、生物学特性和细胞胚胎学的比较研究。 四倍体熏衣草的各个器官都发生了巨大型的变异:茎粗、叶片大小和厚度,花冠和花萼、花粉粒、种子都比二倍体大,但是分枝数、叶量、花穗数都比二倍体减少。 四倍体熏衣草始花年龄比二倍体熏衣草晚一年。开花期晚1-5天,一朵花开花持续时间比二倍体延长1-2天。四倍体熏衣草的花柱比二倍体的短,成熟时间也晚,结实率约为二倍体的一半,四倍体熏衣草的抗寒力比二倍体弱。 二倍体熏衣草结实率低,主要是由于授粉后3-4天时,每朵花中有1/2-3/4的胚珠在形成6-10余个细胞的胚乳阶段退化所造成。四倍体熏衣草的结实率更低。除以上原因外,柱头成熟过迟和花柱过短,影响正常授粉过程,是构成四倍体熏衣草结实率更低的主要原因。另外,四倍体熏衣草的种子普遍不饱满,空壳率高(占52.2%)。

Experiments were Carried out in 1979 on the Institute of Genetics, Academia Sinica.The results obtained are summarized as follows: When the inoculated N.tabacum were checked to be at uninuc- leate pollen stage Which corresponded mainly to the megaspore mot- her cell stage (possess 71.89%) as well as some was dyad stage or tetrad of megaspores stage.When 3 days after inoculated most of the ovules expanded. For embryological observations.Ovaries of N.tabacum (Copus yeusuheku No4),N.rustica and Tr.aestivum (Rf_1)...

Experiments were Carried out in 1979 on the Institute of Genetics, Academia Sinica.The results obtained are summarized as follows: When the inoculated N.tabacum were checked to be at uninuc- leate pollen stage Which corresponded mainly to the megaspore mot- her cell stage (possess 71.89%) as well as some was dyad stage or tetrad of megaspores stage.When 3 days after inoculated most of the ovules expanded. For embryological observations.Ovaries of N.tabacum (Copus yeusuheku No4),N.rustica and Tr.aestivum (Rf_1) were sampled at 2—4days intervals after inoculation,fixed in Carnoy's Fluid (1 part of glacial acetic acid plus 3 parts of ethanol) for 18—24h, stored in 70% ethanol,stained in toto for14—16h in Heidenhain's haematoxylin,washed thoroughly in several changes of tap water, each for 10 minutes.The stained materials were passed through aroutine procedure of paraffin method,sectioned to 4—6um,and after being dewaxed with xy101,mounted directly in Canada balsam. Embryological observations revealed that after inoculated the unpollinated ovaries of N.tabacum were found to contain embryo sacs of different stages.Induction the megaspore mother cell were carried meiosis in vitro and formed one megaspore.It went on mitosis of formation 2—8 nuclei as more irregular free nuclei.From about 7 days on,emhryogenesis took place mass of cells in some embryo sacs,It were developed into embryoids. The results obtained revealed that there are two ways of plantlet production:(1)Ovary haploid plant was derived from the macrospore without an intervening Callus phase.For example,the N.tabacum regenerated plantlets of haploid were derived from macrospore.(2) Ovary haploid plant was derived directly from the egg cell of mature embryo sac.For example,the Tr.aegtivum regenerated plantlets of haploid were derived from differentiating Callus.In same medium embryoids not were derived from Cullas. Finally,Plantlets were developed.

未传粉的子房离体培养后,通过细胞胚胎学的观察结果表明,胚囊中出现接种时不存在的各个发育时期,并发现未传粉烟草子房中含有2—8个游离核,有的胚囊含有更多个排列不规则的游离核。当培养7天时,胚胎发生,胚囊中形成细胞团(即原胚状体),它进一步发育成为球形胚状体。单倍体烟草和小麦植株的形成来自两条途径:(1)来自大孢子,由它直接进行多次分裂,经细胞团、胚状体各阶段发育形成植株。(2)来自卵细胞,经胚状体各阶段发育而形成的。并非起源于子房壁和胚珠体细胞组织。

After studying cytoembryology, several new ways of tooacco pollen embryo were observed.They are as follows: vegetative cell(nucleus)(A-V, A-V1) , reproductive uncleus (A-G, A-G1), vegetative nucleus and reproductive nucleus (A-GV, A-GV1) , equal vegetative cell (nucleus) (B -V, B-V1), equal reproductive nucleus (B-G, B-G1) and polyplotype of nucleus (C) , of which the vegetative cell development way is the chief one.

通过细胞胚胎学研究,发现了几种新的烟草花粉胚发育方式,并把发生途径分为三大类+-亚类型:营养细胞(核)发育途径(A—V、A—V_1);生殖核发育途径(A—G、A—G_1);营养核和生殖核发育途径(A—CV、A—CV_1);均等类营养细胞(核)发育途径(B—V、B—V_1)均等类生殖核发育途径(B—G、B—G_1)及核加倍途径(C)。上述发育途径中,以营养细胞(核)途径为主,均等类营养细胞(核)途径次之。讨论了这些发育途径的最终命运。

 
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