授粉

After pollinated 50days the result indicated that fruit shape index weight of single fruit and volume of single fruit on Suli pear variety during fruit growth were significant different because of pollex xenia action of some of different varieties pollinating on Suli pear variety .

选用当前生产中推广的8个梨优良品种给酥梨授粉，授粉后50d调查分析，结果显示：由于授粉品种的花粉直感作用，使得酥梨果实的果形指数，单果重及体积发生变化，一些品种间存在着显著差异。

The result indicates that honeybee is the most ideal pollinator, and honeybee industry has played a vital role in maintenance of environment development and protection of ecological equilibrium.

研究结果表明，蜜蜂是最理想的授粉昆虫，蜜蜂产业在维护环境发展和保护生态平衡中具有重要作用，当前要大力宣传蜜蜂授粉对农业的增产和维护生态平衡的作用，出台保护授粉的法规，培育龙头企业，推进产业化进程，带动农业增产和农民增收，把保护蜜蜂提高到保护人类的高度来认识。

With pollen of Dashizaosheng, Black jewel pollinate respectively for Fengweihuanghou, setting rate were 13.33% and 5.83%, which were significantly higher than the setting rate of self-pollination of Fengweihuanghou, and they can achieve the output of production requirements. So they were taken for pollinizer of Fengweihuanghou.

用大石早生和黑宝石的花粉为风味皇后授粉，坐果率分别为13.33%和5.83%，均极显著地高于风味皇后自花授粉的坐果率，且均能达到生产上要求的产量，认为上述2个李品种均可作为风味皇后的授粉树。

Thus, flowering plant species dependent on insect pollination, as opposed to self-pollination or wind pollination, could be endangered when the population of insect-pollinators is depleted by the use of pesticides.

因此，依赖于昆虫授粉的开花类的植物，因为不同于自身授粉或风媒授粉，在花粉媒虫数量因杀虫剂的使用而减少时，会濒临灭绝的危险。

In the mature embryo sac, the synergid filiform apparatus, the polari-ties of the egg and zygote and the two polar nuclei are significant.

在授粉后18-24小时，卵细胞开始受精，在授粉后54-58小时，合子开始分裂，但初生胚乳核则在授粉后32小时已开始分裂。4。

Morphology of sexual reproduction abortion in'High Noon', a distant hybridization cultivar of tree peonies(P.delavayi var. lutea×P. suffruticasa), was systematically investigated with light microscopy and cross. The results indicated that:(1)The stamens matured earlier than the gynoecia and pollens dispersed at the early stage of anthesis but the rate of normal 2-celled pollens were merely 2.41%.

采用光镜和杂交等方法对牡丹远缘杂交一代品种'正午'有性生殖败育进行系统形态学观察发现：(1)雄蕊较雌蕊先成熟，初花期即散粉，正常2-细胞花粉仅占2·41%，且花粉在多种培养液中、在自身和其它两种柱头上均不萌发；柱头在谢花期大量分泌粘液，进入最佳授粉状态；(2)同一胚珠中多个大孢子母细胞减数分裂高度不同步，胚囊发育与受精延迟，部分胚乳游离核在细胞化时期分裂异常；(3)自花及品种内异花授粉不结实，天然授粉结实率为0·053‰~0·130‰。

The results showed that the germinating rates were highest when inbred seeds of sweet corn (su 1) were harvested 25～30 days after pollination or whe n effective accumulated temperature from pollination to harv...

结果表明，发芽率最高的收获期及其有效积温分别为：普甜玉米自交系种子于授粉后的 2 5～ 30d ，授粉到收获有效积温为 4 2 7.4～ 5 2 8℃；杂交组合F1代种子于授粉后 30～ 35d ，授粉到收获有效积温为5 2 8～ 6 2 0℃。

At the same time, there was remarkable difference in the calcium distribution on the wall of micropylar canal between self-pollinated and cross-pollinated ovules: abundant calcium precipitates were found on the wall of self-pollinated ovules, whereas none on cross-pollinated pollen.

同时，自交和异交授粉胚珠珠孔道壁钙信号表达也存在很大差异，自交授粉胚珠珠孔道壁有大量钙颗粒密集，而异交授粉胚珠珠孔道壁无钙沉淀积累。

Conversely the seeds had the longest mean length of incubation time and germination peak value when pollinated every day.4 The planting date had effects on yield and quality of carrot seeds from different seed umbels and poisons of seed disc, also had effects on the growth and development of carrot steckling.

不同授粉时期对种子产量、千粒重、发芽率、发芽势的影响不显著，仅对种子的平均发芽天数、发芽高峰日分别存在显著、极显著影响，且&每日授粉&的种子平均发芽天数及发芽高峰日最长，&隔1日授粉&的种子平均发芽天数及发芽高峰日最短。

In a giving stage after pollination,p53 homologue showed high levels in the antipodal cells,integument,immature endosperm,ovary wall,tracheary elements,and aleurone layer,while c-myc homologue showed low levels in these tissues,only before pollination showed high expression in polar nucleus.

结果发现，在授粉后的一定阶段，在反足细胞、珠被、未成熟的胚乳、子房壁、导管组织和糊粉层中，p53同源基因表达强烈，c-myc同源基因的表达相反，在授粉后的这些组织中基本不表达，而在授粉前的中央细胞的极核中表达水平较高。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。