花粉

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。

Pollen morphology of 5 species in genus Tillandsia were observed by standard electronic modules. The results revealed the common features in their shape: i.e l-colporate and reticulate exine. All these showed that genus Tillandsia plants were more advanced in evolution than the other species within the same taxa.

在扫描电子显微镜下观察了5种铁兰属植物花粉的微形态，结果表明：铁兰属植物花粉的微形态具有一定的共性，即都具有1个萌发沟，花粉外壁都具网纹纹饰，说明铁兰属植物是自然类群中较进化的类群。

Pollen activity of trisomic 2,7,9 was lower than that of diploid significantly;Pollen activity of trisomic 7 was the lowest.

5.9号三体的花粉活力显著低于二倍体；2号、7号三体的花粉活力极显著低于二倍体；7号三体的花粉活力最低。

Monosomic 3, monosomic 5, monosomic 10, trisomic 4 and trisomic 5 as experiment materials, their meiosis behavior of pollen mother cell, pollen characteristics, physiological and biochemical characteristics of anther, section observation of pollen development and the structure of embryo sac were studied, and the effects on the seed set and transmission rate were analyzed.

本文以大白菜同源四倍体小孢子培养产生的且已鉴定为3号单体、5号单体、10号单体、4号初级三体、5号初级三体的非整倍体株系及二倍体株系等为试材，对各材料的结籽率、雄配子传递率进行了统计，并对花粉母细胞减数分裂行为、花粉特性、花粉发育和胚囊结构以及花药生理生化特性等方面进行了观察研究，进而分析了其对大白菜单体n-1雄配子和三体n+1雄配子传递率的影响。

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。

Effects of different fruit-retaining reagents upon fruiting on Yunan seedless wampee;2. To probe into the seedless reason of fruit of the Linyuan 1 seedless wampee ,the Linyuan 1 seedless wampee is observed at its flower organs, pollen quantity and degree of satiation, and germination, and compared with the seed wampee.

为了探讨林院 1号无核黄皮果实无籽的原因，于 1992年～ 2 0 0 0年在广西大学林学院观察林院 1号无核黄皮的花器、花粉数量及饱满程度、花粉萌发情况，并和有核黄皮比较；采用随机区组试验设计，对林院 1号进行自然授粉、去雄不授粉套袋、去雄后用有核黄皮花粉授粉并套袋的授粉试验；观察林院 1号的授粉受精过程。

Pollen grains are adapted according to the method of pollination, those carried by insects often being sticky or barbed, while wind-pollinated plants generally produce smooth light pollen.

花粉粒与授粉方式相适应，那些虫媒花，花粉通常是粘性的或有刺的，而具有风媒花的植物，其花粉通常光滑而轻。

Four testing methods to detect the pollen viability of cucumber were being compared. The results indicated that I-KI staining method and acetic red dyeing were not suitable to judge the pollen viability of cucumber. Tetrazolium method can be used but the error is oversize. By and large, the Germination in vitro method was an efficient, stable and simple way to judge the pollen viability of cucumber. The component of culture medium is 10% sucrose+ 100mg/L H_3BO_3. If inoculated intraday, collect pollen of fresh abloom flower at 6:00 and if inoculated at the second day, collect before dark.

比较了4种常用的花粉活力测定方法——I-KI染色法、醋酸洋红染色法、TTC染色法和离体萌发法，认为I-KI染色法和醋酸洋红染色法不适于测定黄瓜花粉生活力，TTC染色法虽适用但误差较大，综合考虑各项因素，确定离体萌发法是最准确、简便、稳定的测定黄瓜花粉活力的方法。

Objective: To investigate the antigenic components of Amaranthus spinosus pollen, and to lay theoretical base for the purification of Amaranthus spinosus pollen allergens and the standardization of allergenic vaccine.

目的：分析刺苋花粉的抗原成分以及刺苋花粉特异性变应原组分，为刺苋花粉变应原的纯化和标准化变应原疫苗的研制提供理论依据。

Self-pollination was brought as the essential reason for causing emptied seeds by former researchers. Based on those studies, potassium antimonate and electron microscopy were used to study the calcium distribution of pollens in the micropylar canal of self-pollinated and cross-pollinated ovules and morphological changes in certain cells undergoing programmed cell death from pollination to fertilization, and observation of histo-chemical changes during microgametopyte development was performed by paraffin section.

前人研究认为自交是华北落叶松产生空粒的主要原因，本论文在此基础，运用焦锑酸钾沉淀法配合电镜观察研究了传粉后到受精前异交控制和自交辅助授粉胚珠珠孔道内花粉的钙分布情况，及此过程中细胞程序化死亡超微结构的变化，并通过石蜡切片研究了华北落叶松传粉后到受精前雌配子体发育过程及细胞内含物的变化，以研究在受精前胚珠内是否存在花粉识别与选择系统，探讨钙信号传导和花粉与胚珠相互作用及细胞程序化死亡的关系。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了