胚珠
生物
花粉管
花粉
不育
植物
授粉
油茶
双受精
合子
胼胝质
发芽
雌蕊
人类受精
雄蕊
胚胎
胚胎发生
细胞生物学
农学
细胞壁
作者
Ting Liao,Deyi Yuan,Zhaozhong Feng,Chao Gao,Yong Yang,Lin Zhang,Xiaofeng Tan
出处
期刊:PLOS ONE
[Public Library of Science]
日期:2014-06-13
卷期号:9 (6): e99639-e99639
被引量:44
标识
DOI:10.1371/journal.pone.0099639
摘要
In this report, self-sterility in Camellia oleifera was explored by comparing structural and statistical characteristics following self-pollination (SP) and cross-pollination (CP). Although slightly delayed pollen germination and pollen tube growth in selfed ovaries compared to crossed ovaries was observed, there was no significant difference in the percentages of pollen that germinated and pollen tubes that grew to the base of the style. There was also no difference in morphological structure after the two pollination treatments. However, the proportions of ovule penetration and double fertilization in selfed ovules were significantly lower than in crossed ovules, indicating that a prezygotic late-acting self-incompatible mechanism may exist in C. oleifera. Callose deposition was observed in selfed abortive ovules, but not in normal. Ovules did not show differences in anatomic structure during embryonic development, whereas significant differences were observed in the final fruit and seed set. In addition, aborted ovules in selfed ovaries occurred within 35 days after SP and prior to zygote division. However, this process did not occur continuously throughout the life cycle, and no zygotes were observed in the selfed abortive ovules. These results indicated that the self-sterility in C. oleifera may be caused by prezygotic late-acting self-incompatibility (LSI).
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