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胼胝质
相关语句
  callose
    CORRELATION OF CALLOSE ACCUMULATION IN THE SIEVE TUBES OF PAULOWNIA PHLOEM WITH RESISTANCE AGAINST WITCHES'BROOM AGENT(MLO)
    泡桐筛管内胼胝质与抗丛枝病关系的研究
短句来源
    CHANGE OF CALLOSE WALL AND SPRO POLLENIN OF MICROSPORANGIUM ABORTION IN CUNNINGHAMIA LANCEOLATA
    杉木小孢子囊败育过程中的胼胝质壁和孢粉素的消长
短句来源
    Callose deposits occur in the stigmatic pailla.
    有些柱头细胞有胼胝质反应。
短句来源
    Callose spots are deposited among PMCs at leptotene stage.
    小孢子母细胞在减数分裂前期Ⅰ细线期开始沉积胼胝质壁。
短句来源
    By metaphase Ⅱ and anaphase Ⅱ, the callose plates deposit at its maximum of thickness.
    以后胼胝质壁加厚,于中期Ⅱ及后期Ⅱ达到最厚。
短句来源
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  “胼胝质”译为未确定词的双语例句
    Starch Grain and Callus of Pollen in Glyptostrobus Pensilis (Staunt.) Koch
    水松花粉中的淀粉粒和胼胝质
短句来源
    By means of microscopy,the tissues structure of branchs was measured,the result shows that the cambium relativity thickness in the healthy branch is 10.28 μm, but in the infected branch is 6.71 μm,cortex and xylem relativity thickness are unchanged basically.
    结果表明:MLO的侵入使筛管细胞产生胼胝质胼胝质的聚集堵塞了筛板孔和由胞间连丝连接筛管与相邻细胞的通道,使得皮部细胞的差别透性增大,木质部的差别透性减小,形成层相对厚度变薄。
短句来源
    The callus appears first between the inner wall and the plasmic membrane of the microspore mother cell and then a callous circle and two callous semicircles are formed in the equatoreal region of meiosis-Ⅰ, Ⅱ.
    胼胝质首先出现在花粉母细胞内壁和质膜之间,然后在减Ⅰ,Ⅱ赤道区处形成一环形和两个半圆形的胼胝质
短句来源
    There is obvious fluorescence of the callous around and between vegetative and generative cells.
    营养细胞和生殖细胞周围及其之间具有明显的胼胝质荧光。
短句来源
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  callose
Inhibition of callose hydrolysis by salicylic acid interferes with tobacco mosaic virus transport
      
The disks cut out from the inoculated leaves were used for determining virus accumulation, callose content, and ribonuclease and β-1,3-glucanase activities.
      
The extent of the resistance correlated with the callose content and the level of ribonuclease activity observed on the infection day.
      
The resistance towards the infection with PVX is probably mediated by the callose and ribonuclease induction.
      
SA stimulated the formation of "rapid" callose involved in the control of the plasmodesmal permeability, which was assessed from fluorescence after tissue staining with Aniline Blue.
      
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Incompatible barriers were studied under artificial pollination with light microscopy, epifluorescence microscopy and scanning electron microscopy in intersectional crosses of Populus euphratica Oliv. and P. simonii Carr. The results are as follows.1. Populus euphratica Oliv.×P. simonii Carr.A considerable amount of pollen grains of Populus simonii Carr. may germinate rapidly on the stigma of P. euphratica Oliv. and penetrate into the stigmatic tissue easily. Pollen tubes of those appear in twisting, coiling,...

Incompatible barriers were studied under artificial pollination with light microscopy, epifluorescence microscopy and scanning electron microscopy in intersectional crosses of Populus euphratica Oliv. and P. simonii Carr. The results are as follows.1. Populus euphratica Oliv.×P. simonii Carr.A considerable amount of pollen grains of Populus simonii Carr. may germinate rapidly on the stigma of P. euphratica Oliv. and penetrate into the stigmatic tissue easily. Pollen tubes of those appear in twisting, coiling, creeping and bursting fashions are in rare cases. Some of the tubes can grow normally through the style and enter into the ovarian cavity, while others cease its growth due to the deposition of the pollen tips. The megasporogenesis stagnate for 6—7 days as the pollen tubes come around the ovules. Having degenerated before the maturation of the embryo sac, the pollen tubes lost its viability to enter into the embryo sac. Thus no fertilization proceeds.2. Populus simonii Carr.×P. euphratica Oliv.The pollen grains of P. euphratica Oliv. may germinatc on the stigma of P. simonii Carr. Only a few pollen tubes penetrate a straight path to the stigma. While a lot of pollen tubes appear to have a twisting, coiling, bulging and creeping fashions. Some of them are inhibited from further growth and some do penetrate into the stigma surface finally. Callose deposits occur in the stigmatic pailla. However, pollen tubes that penetrate through the stigma may grow normally into the style and then enter the ovary cavity with two well-developed sperms. Fertilization takes place 4—7 days after pollination. A considerable amount of embryos abort at various developmental stages, especially at the proembryo stage. A small quantity of them may develop to its full size and run to mature seeds.

在人工授粉条件下应用明视野显微镜、荧光显微镜和扫描电镜观察了胡杨与小叶杨派间杂交不亲和性的障碍,结果如下: Ⅰ.胡杨×小叶杨:小叶杨的花粉管多数能够顺利地进入胡杨柱头;其中一些花粉管能够正常地在花柱中生长,另一些则因先端沉积胼胝质而停止生长;当花粉管进入子房腔时胚囊尚未成熟,花粉管未能及时进入胚囊。及至胚囊成熟,花粉管衰退,丧失其进入胚囊的能力,故不能发生受精作用。Ⅱ.小叶杨×胡杨:大多数胡杨的花粉管在小叶杨的柱头上呈扭曲、盘绕或爬行状,而且管中往往充满胼胝质,不能穿入柱头;有些柱头细胞有胼胝质反应。少数胡杨的花粉管能够径直地或几经曲折后进入小叶杨的柱头组织中。在花粉管穿经花柱、进入子房腔和到达胚囊的各个阶段都可能因管端沉积胼胝质而停止生长,但也有一些能够正常地进入胚囊,并发生双受精作用。胚大多在球形期或心形期败育,只有少数可发育至成熟。

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...

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。

The male flowers of Populus lasiocarpa survive the winter in PMCs stage. Meanwhile, a large number of starch grains accumulate in the outer wall layers show a successive decrease in starch grains content in them, but retaining rich starch grains in the inner ones. Finally, all of the starch grains disappear from the wall layers and high concentration of soluble polysacchaddes is further synthesized and maintained in tapetum and PMCs. Tapetal cells always contain rich DNA, RNA and protein. The changes of the...

The male flowers of Populus lasiocarpa survive the winter in PMCs stage. Meanwhile, a large number of starch grains accumulate in the outer wall layers show a successive decrease in starch grains content in them, but retaining rich starch grains in the inner ones. Finally, all of the starch grains disappear from the wall layers and high concentration of soluble polysacchaddes is further synthesized and maintained in tapetum and PMCs. Tapetal cells always contain rich DNA, RNA and protein. The changes of the content and the distribution of RNA are similar to those of the protein during microsporogenesis.Callose spots are deposited among PMCs at leptotene stage. Gradually the spots connect with each other to form plates which completely surround the PMCs at metaphase I . By metaphase Ⅱ and anaphase Ⅱ, the callose plates deposit at its maximum of thickness. With the formation of tetrads, callose deposition starts on the center of the tetrads, and then extends rapidly along the four cells, separating them from each other. A great majority of tetrads are tetrahedral, seldom isobilateral.

大叶杨早期雄花以小孢子母细胞阶段越冬。大量淀粉粒贮存于花药表皮和药室内壁,并在减数分裂过程中向花药内部移动,逐渐消耗殆尽。与此同时,绒毡层细胞和小孢子母细胞逐渐积累多糖。绒毡层细胞始终含丰富的 DNA、RNA、蛋白质。RNA和蛋白质在小孢子发生过程中表现一致性的分布和含量变化。 小孢子母细胞在减数分裂前期Ⅰ细线期开始沉积胼胝质壁。胼胝质为颗粒状沉积,逐渐连结成片,于中期Ⅰ完全包裹小孢子母细胞。以后胼胝质壁加厚,于中期Ⅱ及后期Ⅱ达到最厚。四分体形成后,由四分体中央向各向辐射形成胼胝质侧隔壁。四分体多排列为四面体形,偶尔可见左右对称形、十字交互形排列。后期四分体周缘胼胝质壁溶解消失,小孢子释放。侧壁最后被溶解。

 
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