花粉

Recently, a kind of F-box genes were isolated and identified from the plants of Antirrhinum, Prunus dulcis and Prunus mume, et al.

最近从金鱼草、Prumus dulcis、梅等植物中分离的F-box基因，它具有花粉S基因特点，即在花药、成熟的花粉和花粉管中特异表达；在基因位置上，与S-RNase基因紧密连锁；不同物种或同一物种不同品种F—box基因间核苷酸和氨基酸序列上存在高度多态性。

Study on the pollen fertility and the process of pollen formation and development in autotetraploid rice showed that the pollen fertility was high (78.33%), though many abnormities appeared in this process.

通过对5个品种的同源四倍体水稻花粉发育过程和13 个品种的花粉育性调查结果表明，同源四倍体花粉平均育性为78.33%，明显比二倍体（91.85%）低。

Pollen granular, united into pollinia attached to a retinaculum through a caudicle; filaments connate into a gynostegium.

花粉颗粒状，通过一花粉块柄合并成花粉块着生retinaculum；花丝合生成为一合蕊冠。

The results show that the pollen forms of Ferula and Heracleum are prolate and perprolate, respectively, and there are 3 colporates with reticulate sculpture on the pollen exines of the both genuses.

结果表明，阿魏属花粉形状为长球形，而独活属花粉为超长球形；2属花粉外壁均具有网状纹饰，3孔沟。

The increase or decrease of Ca〓 level or inhibition of CaM activity in germinating pollen led to the inhibition of normal catabolism of total, neutral, polar lipids, phospholipids and free fatty acids and disturbance of the normal gemination—induced changes of composition of fatty acids, and finally inhibited pollen germination and tube growth.

提高或降低花粉内Ca〓水平以及使用CaM抑制剂导致正常的脂类和游离脂肪酸分解代谢过程受阻，极性脂脂肪酸组分改变，从而影响花粉的萌发和花粉管的生长。

Pollcn morphology of 11 Heracleum species was examined under LM andSEM. It is shown that pollens of these specics are all of retangular type andequatorial constricted type, with polar views of 3-splitted round, obtuse triangle ortrianglc. Interspecific variations exhibit in pollen size and exine exolamelle.

对独活属11种植物的花粉进行光镜和扫描电镜观察发现，本属花粉为伞形科中比较进化的矩形型和赤道收缩型；极面观3裂圆形、钝三角形、三角形；花粉大小及外壁纹饰在种间存在明显差异。

But they were partial sterile, had 1～4 pollen sacs in each anther and had relative bigger petals and stamens at lower temperature situation. The RGCMS plants were complete sterile at the both temperature situations, and there was no pollen sac differentiation and had smaller peta...

表现核质不育的植株，在高温条件下，花瓣小，表现彻底的polCMS不育，无花粉囊的分化；在低温条件下，花瓣变大，也表现彻底雄性不育，具有核、质不育的共同特点，每个花药可分化出 1～ 4个花粉囊，但无可育花粉，其雄性败育时期和特点与S45A和 117A相同。

The DGCMS plants were complete sterile at the both temperature situations, and there was no pollen sac differentiation and had smaller petals and stamens at the higher temperature situation, but there were 1～4 pollen sacs in each anther and had bigger petals and stamens at the lower temperature situation. The cytological characteristics of the anther development were the same as that of GMS plants in Yi-3AB.

表现质核不育的植株，在高温条件下，花瓣小，表现彻底的pol CMS不育，无花粉囊的分化，在低温条件下，花瓣变大，也表现彻底雄性不育，具有核、质不育的共同特点，每个花药可分化出1～4个花粉囊，但无可育花粉，其雄性败育时期和特点与宜3A相同。

They were partial sterile, had 1～3 pollen sacs in each anther and had relative bigger petals and stamens at lower temperature situation. The DGCMS plants were complete sterile at the both temperature situations, and there was no pollen sac differentiation and had smaller petals and stamens ...

表现质核不育的植株，在高温条件下，花瓣小，表现彻底的 pol CMS不育，无花粉囊的分化；在低温条件下，花瓣变大，也表现彻底雄性不育，具有核、质不育的共同特点，每个花药可分化出 1～ 4个花粉囊，但无可育花粉，其雄性败育时期和特点与宜 3A相同

Morphological and cytological observations showed that the pol CMS plants in DGCMS-Yi-3A were complete male sterile, had no pollen sac differentiation and had smaller petals and stamens at higher temperature situation. They were partial sterile, had 1～3 pollen sacs in each anther and had relative bigger petals and stamens at lower temperature situation.

花器形态和花药发育的解剖学观察结果表明，DGCMS-宜3A中表现波里马细胞质雄性不育的植株，其花器形态和花药发育的解剖学特点与pol CMS相同，即在高温条件下，花瓣较小，表现彻底不育，无花粉囊的分化，在低温条件下，花瓣变大，表现部分雄性不育，可分化出1～4个花粉囊，并产生一定数量可育花粉。

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