查询词典 tapetum

Subsequently, the tapetum cell began to disorganize, and it kept the strongest Ca^2＋ fluorescence intensity from microspore to pollen maturity until the tapetum was disappeared completely.

在花药壁组织内Ca^2＋分布也呈现规律性的变化：造孢组织时期，花药壁组织Ca^2＋荧光强度在不同壁层组织中分布均匀；小孢子母细胞时期，药壁中层细胞Ca^2＋荧光最强，绒毡层细胞次之；单核小孢子时期，绒毡层细胞呈解体状态，Ca^2＋荧光最强，并保持到二核花粉时期直至绒毡层完全消失，但此时花药纤维层发育形成，表现出较强的Ca^2＋荧光。

The results show that: Each anther has four pollen sac, anthers from the epidermis, medicine room wall, the middle, composed of the tapetum, Mature middle and all the disintegration of tapetum; is symmetrical tetrad type, pollen is a 2 - cell-type pollen; in anther culture lei check standards should be time for about 3-4mm.

研究结果表明：每个花药具备4个花粉囊，花药由表皮、药室内壁、中层、绒毡层组成，成熟后中层和绒毡层都解体；四分体属左右对称型，花粉属2-细胞型花粉粒；在进行花药培养时取蕾标准应为3-4mm左右。关键词：铃兰；花药；解剖

Based on principle of pollen abortion, utilizing tapetum of anther cell, mitochondria of tapetum, callose well, process of cell meiosis during formation process of pollen, we adopt genetic transformation to create plant male sterility, such as, exogenous cytotoxin gene, chaperones, anti-sense RNA, degradation of callose ahead of time, disturbing information intercommunion between mitochondria and nucleolus and affected development of pollen sporule by bacteria.

根据花粉败育的原理，利用花药细胞绒毡层、绒毡层线粒体、胼胝质壁、细胞减数分裂过程等花粉形成过程中的不同环节，采取外源细胞毒素基因、分子伴侣、反义RNA技术、提早降解胼胝质、扰乱线粒体与细胞核之间的信息交流和细菌影响花粉小孢子发育等策略，使花粉不能正常形成，从而产生不育花粉，达到产生雄性不育的目的。

The results manifested that the development of tapetum was related to the male sterility of rice, and the abnormal distribution of Ca〓 in tapetum could be closely related with the abnormity of its function.

此研究结果表明绒毡层细胞的发育与水稻雄性不育有密切关系，绒毡层细胞中Ca〓的异常分布可能与绒毡层细胞功能失常密切相关。

Hortorum tapetum indicate that:(1) the peak of metabolism of amoeboid tapetum don't occur when the cell stay at the original site, and (2) the tapetum is not immediately degenerated and provide the pollen with the available material after invasion.

天竺葵绒毡层在发育中的动态行为表明变形绒毡层的生理活动不是在细胞还在原位的时期，而且也不是当它们流入花粉囊后只是简单地自我降解以提供花粉利用的物质。

It is suggested that the product of tapetum degeneration may be absorbed by developing pollen. The special ultrastructural pattern at aperture of pollen represent a morphological adaptation to this short—way transportation of nutrition from the tapetum to pollen.

研究证明在绒毡层的降解和花粉内贮藏物的增加之间存在相关性，这说明绒毡层的降解产物可能被正在发育的花粉所吸收，而天竺葵花粉营养细胞所具有的典型的传递细胞的特点是这种吸收活动在形态上的表现。

The results showed that the tapetum of Zhenshan 97B disrupted promptly at the late uninucleate pollen stage. Whereas, the tapetum of Zhenshan 97A disaggregated at the pollen mother cell stage, the nuclear membrane and the cell membrane disaggregated, the phenomena continued to the binucleate pollen stage.

研究发现保持系绒毡层细胞在单核花粉晚期才开始迅速解体，而不育系绒毡层细胞在花粉母细胞时期就开始出现核膜、细胞膜解体，此过程持续到二核花粉时期。

Whereas, the tapetum of Zhenshan 97A disaggregated at the pollen mother cell stage, the nuclear membrane and the cell membrane disaggregated, the phenomena continued to the binucleate pollen stage. The cytoplasm of the tapetum cells of Zhenshan 97A deposited a few Ca^2＋ precipitates at the pollen mother cell stage.

珍汕97A绒毡层细胞从花粉母细胞时期开始，细胞质内有少量颗粒状的Ca^2＋沉淀；减数分裂时期，绒毡层细胞的内切向壁表面有大量大颗粒的Ca^2＋沉淀；单核花粉时期绒毡层细胞周围集聚一层Ca^2＋沉淀。

Using cytohischemical staining methods, with the results of comparison the dynamics of proteins and polysaccharides in the anthe wall cells and colule cells of different developmental phases in female and male flowers, the anormogenesis of anther tapetum in the inflecting phase of from bisexual flower to unisexual flower was observed. In microspore developed phase, the tapetum functions of preserving and transportingmutritive material for microspore development and of secreting callosal enzyme for decompositing callosal cell lost no normal guadrant formed, of being abnormal meiose of pollen mother cells, and then, the stamen aborted selectively in female flowers and pistil in male flower.

利用细胞组织化学染色技术，对雌、雄花雄蕊花药壁细胞及花药内细胞发育过程中多糖及蛋白质动态进行了比较，实验中观察到雌花在从两性至单性花转变时期雄蕊绒毡层在整个发育过程中表现异常，在小孢子发育过程中未能起到贮藏、转运营养物质供小孢子发育及适时分泌胼胝质酶溶解胼胝质壁的功能，并且花粉母细胞减数分裂异常而未形成四分体结构，进而导致雌花雄蕊选择性败育，而雄花中雌蕊组织也发生了选择性败育过程。

The results showed that The tapetum had the characteristics of both glandular tapetum and metamorphous tapetum, pollen abortion is ralated to tapetum.

结果表明：韭菜花药绒毡层兼有分泌绒毡层与变形绒毡层的特点，花粉败育与绒毡层发育异常和提前解体有关。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。