spore - a small usually single-celled asexual reproductive body produced by many nonflowering plants and fungi and some bacteria and protozoans and that are capable of developing into a new individual without sexual fusion; "a sexual spore is formed after the fusion of gametes" pollinium - a ...
pollen tube如何读 英:[ˈpɔlən tju:b] 美:[ˈpɑlən tub] pollen tube是什么意思 花粉管 pollen tube英英释义 noun a tube that is formed by a pollen grain and conveys the sperm nuclei to the embryo sac of an angiosperm or the archegonium of a gymnosperm noun a tube ...
The meaning of POLLEN TUBE is a tube that is formed by a pollen grain and conveys the sperm nuclei to the embryo sac of an angiosperm or the archegonium of a gymnosperm.
The pollen tube is a cellular protuberance formed by the pollen grain upon its contact with the stigma. Its main purpose is to deliver the sperm cells to the female gametophyte to ensure double fertilization. The pollen tube is a tip-growing cell characterized by its simple cell wall ...
Article https://doi.org/10.1038/s41467-023-35936-z Pollen tube emergence is mediated by ovary-expressed ALCATRAZ in cucumber Received: 28 October 2021 Accepted: 9 January 2023 Check for updates Zhihua Cheng1,4, Xiaofeng Liu1,4, Shuangshuang Yan1, Bin Liu2, Yanting Zhong1, Weiyuan Song1,...
Define pollen sac. pollen sac synonyms, pollen sac pronunciation, pollen sac translation, English dictionary definition of pollen sac. n. One of the chambers of an anther or a male cone in which pollen is produced; the microsporangium of a seed plant. Am
After germination occurs, the pollen tube is formed and the female productive gamete can then be fertilized. The main mode of transfer of the pollen grain in gymnosperms is wind. This is because cones are not typically visited by animals and insects since they do not contain nectar. The ...
8.pollen tube guidance花粉管导向 用法例句 1. PPN-At2 formed. 3 Cucumber transformation test was carried for bellow genes byPollen-tubepathway. 利用花粉管通道技术对上述基因进行了黄瓜的遗传转化实验。 2. Transgenic rice plant was obtained by transferring the Arrowhead Proteinase Inhibitor (API) gene ...
Other articles where pollen tube is discussed: angiosperm: Pollination: The pollen tube ultimately enters an ovule through the micropyle and penetrates one of the sterile cells on either side of the egg (synergids). These synergids begin to degenerate im
Once the pollen grain germinates, the two sperm cells move down the pollen tube. When they reach their destination, one of the sperm cells fertilizes the egg, while the other fertilizes a specialized cell that becomes the endosperm, or nutritious tissue for the newly formed embryo. Read ...