当花粉成熟时，绒毡层细胞完全解体。
Tapetal cells degenerate completely when pollen grains reach maturity.
二是花粉成熟前期，淀粉粒积累发生障碍。
The other showed the farina accumulation existing obstacle in the prophase of pollen maturation.
表皮细胞外壁在花粉成熟时期略有增厚，且具小刺状突起。
The outer wall of epidermal cells with spininess becomes slightly thick at mature pollen stage.
成熟的蜜蜂访花，收集花粉和花蜜吃。
Mature bees visit flowers to collect pollen and nectar to eat.
成熟花粉为2细胞型。
成熟花粉为二胞型。
小孢子四分体为四面体型排列，成熟花粉有2 -细胞和3 -细胞型2种。
The microspores are arranged in a tetrahedral tetrad. The mature pollen grains are of the 2-celled and 3-celled types.
成熟花粉为2 -细胞型。
能够在成熟花粉以及叶片、根、萼片和柱头中检测到GUS的高水平表达。
High level of GUS expression was detected in mature pollens as well as leaves, roots, sepals and stigmas.
小孢子发育过程涉及花药发育到花粉粒成熟过程中一系列基因的表达。
The expressions of a series of genes are involved in the anther and pollen development.
成熟花粉粒大多是二细胞型，很少产生三细胞型。
Mature pollen grains were mostly two-celled, rarely three-celled.
小孢子壁形成时开始在绒毡层内切线壁出现的球状体到花粉粒成熟时仍有一部分附着于花粉粒表面。
The ubisch bodies which appeared on the inner tangential wall of the tapetum at the time of microspore wall formation are partially remain on the surface of matured pollen grain.
单瓣紫花木槿的小孢子母细胞经过减数分裂形成四面体状的四分体，成熟花粉是二细胞型花粉，圆球型，表面有刺毛。
The results showed that the type of microsporic tetrads of the simple flower is belong to tetrahedral type and the mature pollen is two-celled with bristles on the surface.
在成熟花粉中正常花粉只占45.5%，还有54.5%的花粉在发育过程中发生败育。
The percentage of normal pollen was only 45.5%, and the total frequency of pollen aborted during developmental process was 54.5%.
成熟花粉粒中多糖和蛋白质并存。
The polysaccharoses present in the mature pollen grain accompary with proteins.
风会将成熟玉米的花粉从一片田带到另一片田。
The wind picks up pollen from the ripening corn and swirls it from field to field.
本试验用含有EMS的石蜡油溶液处理10个玉米材料的成熟花粉，研究了EMS对花粉离体萌发率、M1代生理损伤以及M2代的诱变效应。
The mature pollens of 10 maize varieties (lines) were treated with EMS. The induction effects on the germinating rates, the physiological damage of M1 and M2 were studied.
这朵花成熟后，风儿带着它散放出的花粉来到一个陌生的国度。
The flower matured and released its pollen to the winds, and the pollen was taken by the winds and carried to a foreign country.
本文还讨论了成熟花粉粒败育时期和败育形态的划分。
Division of mature pollens abortive stage and shape were also discussed in this paper.
这些结果表明P 0491e01在花药发育后期花粉的成熟过程中起重要的调控作用。
Our results suggest that P0491E01 may play an important role during the late stage of anther development.
成熟花粉3 -细胞型。
综述果树生产中花粉直感对果实品质及果实成熟期的影响，以及花粉直感作用机理的研究现状。
This paper summarizes the effects of metaxenia on fruit quality and fruit maturation period during the fruit production and the research status on action mechanism of metaxenia.
成熟花粉为二胞型花粉。
成熟花粉为3-细胞型。
最终有92.6%—94.8%的小孢子能发育成形态正常、染色能力强的成熟花粉粒。
Finally, 92.6%-94.8% of microspores could develop into normal and stainable pollen grains.
成熟花粉为二细胞型。
从未成熟的花粉粒或者切下的完整的花药中再生出单倍体植株的过程。
Anther culture (pollen culture) the generation of haploid plants from immature pollen grains or intact excised anthers.
成熟花粉粒为二细胞型花粉粒。
成熟花粉多为2 -细胞型，偶见3 -细胞型，具三萌发孔。
Pollen grain is mainly 2-celled type when shed, occasionally 3-celled type, and has three apertures.
成熟花粉多为2 -细胞型，偶见3 -细胞型，具三萌发孔。
Pollen grain is mainly 2-celled type when shed, occasionally 3-celled type, and has three apertures.
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