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mature anther
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  “mature anther”译为未确定词的双语例句
     4.Approximately1/4-1/3 of pollen grains are sterele and wizened in mature anther.
     4、成熟的花药约有1/4-1/3花粉粒是败育、干瘪的。
短句来源
     the mature anther wall comprises the epidermis, the fibrous endothecium, 2-3 middle layers and a secretory tapetum;
     串果藤的花药四室,花药壁由表皮(1层细胞)、药室内壁(1层细胞)、中层(2一3层细胞)及腺质绒毡层(1层细胞)组成。
短句来源
     The mature anther has a fibrous layer of cells.
     成熟花药具纤维层细胞;
短句来源
     Mature anther wall comprises an epidermis followed by endothecium layer, 2 middle layers, and a single-layered tapetum.
     花粉囊由1层表皮、1层纤维层、2层中层和2层绒毡层细胞组成。
短句来源
     Southern hybridization showed that the ZM401 sequence is present in one copy in the maize genome. Northern blots analysis revealed that the expression of ZM401 is restricted to mature pollen and nearly mature anther, and ZM401 transcripts were not detected in leaves, root and other vegetative tissues.
     经基因组 Southern杂交和 Northern杂交分析表明,ZM401基因以单拷贝存在于玉米基因组中,只在花粉组织中表达,在叶片、根、花药的营养组织中均检测不到ZM401 mRNA的积累。
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  相似匹配句对
     Mature
     成熟女人的时尚生活
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     The mature anther has a fibrous layer of cells.
     成熟花药具纤维层细胞;
短句来源
     MATURE LOVE
     成熟女子的成熟情爱
短句来源
     Analysis of growth regulative substances and mineral nutrients in mature anther of pears
     梨成熟花药中生长调节物质及矿质元素含量的分析
短句来源
     The anther of Pachyrhizus erosus (L.)
     豆薯(Pachyrhizus erosus(L.)
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  mature anther
In the mature anther, two or three sub-epidermal layers develop fibrous thickenings.
      
Moreover, 314 genes responded to either GA3 or JA treatment, and 24 GA3- and 82 JA-responsive genes showed significant changes in expression between meiosis and the mature anther stages.
      
Using the lily clone as a probe, a cDNA clone, BMP1, was isolated from a mature anther library of Brassica napus.
      
A cDNA clone, LMP131A, which is preferentially expressed in mature anther was isolated from a lily cDNA library.
      
In the mature anther, a positive signal in the cytoplasm of pollen grains with some detectable localisation in the exine layer of the pollen wall was obtained.
      
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1. In the anther of the rice of male fertility, between two anther chambers that lie at the connective bilateral edge, two "tissue spaces between two anther chambers" are formed beneath the epidermis at the bottom of the concave places. They both get through the bilateral edge of the anther longitudinally. The mature anther has a fibrous layer of cells. On the two ends of the anther and between the two anther chambers in the concave places, the cell walls of the fibrous layer produce strong...

1. In the anther of the rice of male fertility, between two anther chambers that lie at the connective bilateral edge, two "tissue spaces between two anther chambers" are formed beneath the epidermis at the bottom of the concave places. They both get through the bilateral edge of the anther longitudinally. The mature anther has a fibrous layer of cells. On the two ends of the anther and between the two anther chambers in the concave places, the cell walls of the fibrous layer produce strong annular secondary thickened strips which are oriented perpendicularly to the circumference, and which connet transversally with each other, thus making up respectively a "spring" on the partial walls (circumference) of the two anther chambers. The same end of the two "springs" respectively connects with the two lateral edges of the "tissue space between two anther chambers". The strong "spring" and the "tissue space between two anther chambers", when they exist simultaneously, are the inner factors of the opening of the anther.2. The failure for the anther of male sterile lines in rice to open is due either to the non-existence of the "tissue space between two anther chambers", or to the formation of very weak "springs".3. Secondary thickened indensity on the cell walls of the fibrous layer of the concave places between the two anther chambers, become weaker and weaker from the two ends of the anther to its central parts and in the central place no secondary thickness is formed. This tissue structure has decided the orders of the longitudinal slits of the anther, which begin at the two ends and then the slits extend to each others central parts till their complete opening.4. When conditions are not suitable, there will appear a part of anthers of male sterilily in some hybrids of rice.

1.雄性能育水稻的花药,位于药隔两侧的各两药室间凹陷部位底部的表皮细胞下形成两个“药室间组织间隙”,它们纵贯花药两侧。成熟花药具纤维层细胞;在花药两端两药室间凹陷部位上的那些纤维层细胞壁,沿垂周方向产生强烈的环状次生增厚条纹,它们横向地互相连接而分别在两药室的那段壁(圆周)上各自形成一条“弹簧”,两条“弹簧”的同一端分别和“药室间组织间隙”的两侧边相连;强劲的“弹簧”与“药室间组织间隙”二者同时存在是水稻花药开裂的内因。 2.雄性不育水稻花药不开裂,或者是由于无“药室间组织间隙”的存在,或者是由于形成很微弱的“弹簧”。 3.在两药室间凹陷部位上的那些纤维层细胞壁上次生增厚的强度,由花药两端向中部逐渐减弱,终至中部不产生次生增厚。这种组织结构决定了水稻花药开裂的顺序是两端先开裂,裂缝由两端向中部延伸,直至完全开裂。 4.当条件不适宜时,某些杂种水稻会出现部分雄性不育的花药。

In order to obtain good potato cultivars effectively by cross methord,the anatomical observation of potato male organ was conducted systematically.The result was as follows: Sporogenous tissue of potato was arranged as crescentiform,and mature anther cell was hippocrepiform.The thickness of wall of anther cell was unequal.There was little difference between endothecium and mid-layer of anther cell.Tapetum was adenoid tissue,whose outer layer was originated from wall cell and intine which is...

In order to obtain good potato cultivars effectively by cross methord,the anatomical observation of potato male organ was conducted systematically.The result was as follows: Sporogenous tissue of potato was arranged as crescentiform,and mature anther cell was hippocrepiform.The thickness of wall of anther cell was unequal.There was little difference between endothecium and mid-layer of anther cell.Tapetum was adenoid tissue,whose outer layer was originated from wall cell and intine which is often dichotocarpism from anther septum tissue. When sporogenous cells in potato anther produced 3-4 layers they became microsporocytes.The meiosis of microsporocyte was simultaneous type,and most of tetrad arranged as tetrahedron.The mature microdiode was dikaryocyte and spherical form with 3 pore canals.The size of microdiode was small but its amount was large. Potato anther was mainly of porous dehiscence with part of longitudinal split.The marginal cell wall of pore was thickened striately.The broken heteromorphic cells were found in the part of longitudinal split.Before dehis- cence of anther,septum between the two anther cells of the same side was dissolved,so it was beneficial for pollen scattering.

为了更有效地通过有性杂交选育优良品种,本文对马铃薯的雄性器官进行了系统的形态学观察:1.马铃薯花药的孢原组织为新月形排列,成熟花药药室呈马蹄形。花药壁厚薄不均,药室内壁与中层细胞无明显区分;绒毡层为腺质型,其来源有二;外侧的来源于壁细胞,内侧的来源于药隔组织,并常有二型性。2.马铃薯花药中的造孢细胞产生3~4层时,进而变成小孢子母细胞。小孢子母细胞的减数分裂为同时型,四分体多呈四面体型排列,成熟花粉为2-细胞型。花粉圆球状,具3孔沟,花粉较小,花粉量较大。3.马铃薯花药的开裂,以孔裂为主兼部分纵裂。孔口边缘表皮下有纤维层状(即具条纹状加厚的细胞壁)细胞。部分纵裂部位有裂口异形细胞。花药开裂前,同侧两药室彼此勾通,有利于散粉。

Development of pollen and embryo sac in Populus euphratica Oliv. were observed in brightfield and fluorescence microscopes, and scanning electron microscope. The resultus are as follows.The anther is tetrasporangiate. The mature anther wall comprises an epidermis, a layer of endothecium, 2 middle layers, and a single-layered tapetum. The epidermis is persistant. The endothecium develops fibrous thickenings. One of the middle layer becomes flattened and crushed by the uninucleate pollen stage, and the other...

Development of pollen and embryo sac in Populus euphratica Oliv. were observed in brightfield and fluorescence microscopes, and scanning electron microscope. The resultus are as follows.The anther is tetrasporangiate. The mature anther wall comprises an epidermis, a layer of endothecium, 2 middle layers, and a single-layered tapetum. The epidermis is persistant. The endothecium develops fibrous thickenings. One of the middle layer becomes flattened and crushed by the uninucleate pollen stage, and the other may delay its disintegration until prior to the dehiscence of the anther. Glandar tapetum, the tapetal cell is uninucleate at the early stage and becomes binucleate at PMC (pollen mother cell) meiotic stage. The Ubisch bodies are studded on its inner tangential walls, manifesting bright green, auramine orange induced fluorescence. SEM micrograph shows "bridge" between the Ubisch body and the exine of pollen grain. The meiotic division does not exhibit a high degree of synchrony. It may be asynchronous within a pollen sac or in two different pollen sacs of the same anther. Simultaneous cytokinesis in the PMCs follows meiosis and the majority of microspore tetrads are tetrahedral and rarely isobilateral.The deposition of callose during microsporogenesis starts at the corner of the PMCs and extends gradually to enveloping PMC by metaphase I, reaches its peak by metaphase Ⅱ, and separates the microspore tetrads along cellular plates. Subsequently, prior to the spore release, the callosic envelop begins to dissolve, and then the callosic cellular plates appear. Pollen grains are 2-celled at shedding stage.The ovule is anatropus, bitegmic at MMC (megaspore mother cell) stage, and the inner integument is arrested in development and becomes unitegmic by the time of megasporogenesis. The nucellus is crassinucellar, containing usually one but sometimes two MMCs. Cytokinesis in the MMC accompanies meiosis and the megaspore tetrads are linear or T-shaped. Callose appears in the transverse walls (linear type) or in the transerve and vertical walls (T-shaped type) formed after each meiotic division but never appears in the side walls (outer walls). The chalazal or subchalazal megaspore is functional, which develops into a Polygonum type embryo sac.Generally, the mature embryo sac comprises a 3-celled egg apparatus, 3 antipodal cells and a central cell with the secondary nucleus. Occasionally, the polar nuclei remain distinct even though the sperm has adhered to one of them. Owing to the degeneration of the nucellus at the micropyle pole during megagametogenesis, the egg apparatus pole of the mature embryo sac directly contacts with the integument and more or less penetrates into the micropyle.

用明视野和荧光显微镜及扫描电镜,观察胡杨花粉和胚囊的发育,结果如下:花药4 室。表皮宿存;药室内壁发育为纤维状增厚;中层2层:1层在单核花粉时消失,另1层则直至花药开裂前才完全退化;腺质绒毡层,内切向壁上分布着乌氏体。小孢子母细胞减数分裂并非高度同步的。胞质分裂为同时型,小孢子四分体为四面体形,少数为左右对称形;胼胝质壁的积累从小孢子母细胞的角隅开始。花粉散出时是 2-细胞的。胚珠在发育的早期为双珠被,以后内珠被停止发育,成为单珠被;厚珠心,含1或2个大孢子母细胞;大孢子四分体为直线形或T形排列。大孢子发生过程中胼胝质出现于二分体和四分体的横隔壁或纵隔壁,但侧壁(外壁)始终不沉积胼胝质。合点端的第1个或第2个大孢子发育为功能大孢子。蓼型胶囊。在胚囊发育过程中珠孔端的珠心组织退化,故成熟胶囊的卵器端直接与珠被和珠孔相接。

 
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