| 词汇 | pollen-tube |
| 释义 | BETA pollen tubecollocation in Englishmeanings of pollenand tubeThese words are often used together. Click on the links below to explore the meanings. pollen noun[ U ] uk /ˈpɒl.ən/ us /ˈpɑː.lən/ a powder, produced by the male part of a flower, that causes the female part of the same type of flower to produce seeds. It is carried by insects or ... See more at pollen tube noun uk /tʃuːb/ us /tuːb/ a long cylinder made from plastic, metal, rubber, or glass, especially used for moving or containing liquids ... See more at tube Examples of pollen tubepollen tube In oaks, early fertilized ovules prevent the fertilization of other ovules by inhibiting the pollentube entry into the embryo sac. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The fungal spores germinate at the anthesis and grow down the pollentube without branching any hyphae outward. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The synergids function in the attraction and guidance of the pollentube to the megagametophyte through the micropyle. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. For instance, the pollentube has an unusual kind of growth; it extends exclusively at its apex. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In angiosperms, only a pollentube enters the micropyle. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Characterization of the translocator associated with pollentube organelles. Characterisation of the translocator associated with pollentube organelles. There is no active pollentube inhibition within the style, but some event or process after the pollentube reaches the ovary is aberrant. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The tip of the pollentube then enters the ovary and penetrates through the micropyle opening in the ovule. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. There are also microsystem-based assays to assess and quantify pollentube behavior. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The main donors to the pathway were the genes associated with the arbuscular mycorrhiza symbiosis genes, the pollentube formation genes and the haemoglobin genes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Depending on the species, this can occur while the pollen forms in the anther or after pollination and growth of the pollentube. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Once the pollen lands on the stigma of a receptive flower, it germinates and starts growing a pollentube through the carpel. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. An example of chemo-tropic movement can be seen during the growth of the pollentube, where growth is always towards the ovules. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Pollen germination, pollentube entry, and double fertilization processes have all been observed to proceed normally. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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