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- The degeneration of mitochondria is one of the earliest events in pollen abortion. 线粒体的退化是花粉败育中最早发生的现象之一。
- We hold that pollen abortion is a significant character of seedless shatian pumelo. 花粉败育是无核的一个重要性状。
- According to the characteristies described above the process is referred to as "hyperplastic"pollen abortion. 基于以上的特点,称之为“核增生型”花粉败育途径。
- Preliminary Studies on the Relationship Between Meiosis of Pollen Mother Cells and Pollen Abortion of Aloe arboresens Mill. 木立芦荟小孢子母细胞减数分裂与花粉育性关系的初步研究。
- 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。
- Of all the chromosomal aberrations, the appearance of asynapitc univalent and resultant pollen abortion was the major cause of seedless fruits. 在各种染色体异常中,不联会的单价体是引起花粉败育产生无籽果实的主要原因。
- The different types of pollen abortion were observed among 3 Phyllostachys species by the examination of pollen viability. 花粉活力的测定说明存在不同类型的花粉败育现象。
- The hypothesis that the disturbance of the sequence of gene expression in the period of the development of anther was the most important cause for pollen abortion was posed. 花药发育过程中基因表达程序的扰乱是引起花粉败育的最主要的原因。
- C412S in normal PMC meiosis, however, showed a peak pollen abortion at later mononucleate stage of microsporogenesis, which mostly belonged to spherical abortion type. C412S花粉败育的高峰在单核小孢子晚期，主要表现圆败型不育。
- The results proposed that the abnormalities of microsporocytic cytoplasm or pollen exine, rather than the tapetal development caused the pollen abortion of Peiai 64S. 据此认为，培矮64S的花粉败育可能是由小孢子母细胞或花粉外壁的异常发育造成的，而不是由绒毡层发育引起的。
- The couse of the pollen abortion in a dual usage nuclear sterile strain the newtype upland rice Kunzhi S-1 is reported in this paper for the first time. 摘要 本文首次报道了一种新型旱稻昆植S-1两用核不育系的花粉败育过程。
- Complete male sterility and partial male sterility were induced on 2 cultivars K78 1B and T0002B by chemical hybridization agents SC2053 and BAU2. In the course of pollen abortion, the change of endogenous hormones was assayed. 实验以K78－1B和T0002B为材料，分别用化学杂交剂SC2053和BAU2诱导完全和部分雄性不育，测定了花粉败育过程中花药组织各种内源激素的变化。
- The results showed that the wholly developmental process could be tentatively divided into four stages, i.e. microsporocyte formation, microsporocyte meiosis, pollen formation, and pollen abortion. 在这一过程中绒毡层发育既表现过早解体，又表现肥大生长、延迟退化的现象。同一枚花药中4个花粉囊的发育也存在明显的先后次序。
- Therefore, it could be inferred that the abortive processes and stages of the two sterile lines were almost the same;and that the key stages of pollen abortion were from uninucleate to trinucleate. 推断2类不育系的败育过程和败育时期基本一致，花粉败育的关键时期可能均为单核期到三核期。
- He took a lot of flak for his stand against abortion. 他因坚持反对堕胎而饱受责难。
- There is a high pollen count in the air. 空气中有很高的花粉计数。
- The abortion issue is political dynamite. 堕胎问题在政治上是个爆炸性的问题。
- They are discussing the morality of abortion. 他们正在讨论堕胎的道德性。
- Abortion is illegal in this country. 人工流产在这个国家是不合法的。
- Abortion is illegal in some states. 堕胎在某些州是非法的。
