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Examples ofpollen tube
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In oaks, early fertilized ovules prevent the fertilization of other ovules by inhibiting thepollentubeentry into the embryo sac.
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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 thepollentubewithout branching any hyphae outward.
FromThis example is from Wikipedia and may be reused under a CC BY-SA license.
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This example is from Wikipedia and may be reused under a CC BY-SA license.The synergids function in the attraction and guidance of thepollentubeto the megagametophyte through the micropyle.
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This example is from Wikipedia and may be reused under a CC BY-SA license.For instance, thepollentubehas an unusual kind of growth; it extends exclusively at its apex.
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Wikipedia
This example is from Wikipedia and may be reused under a CC BY-SA license.In angiosperms, only apollentubeenters the micropyle.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Characterization of the translocator associated withpollentubeorganelles.
From theCambridge English Corpus
Characterisation of the translocator associated withpollentubeorganelles.
From theCambridge English Corpus
There is no activepollentubeinhibition within the style, but some event or process after thepollentubereaches the ovary is aberrant.
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This example is from Wikipedia and may be reused under a CC BY-SA license.The tip of thepollentubethen enters the ovary and penetrates through the micropyle opening in the ovule.
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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 quantifypollentubebehavior.
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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, thepollentubeformation genes and the haemoglobin genes.
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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 thepollentube.
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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 apollentubethrough the carpel.
FromThis example is from Wikipedia and may be reused under a CC BY-SA license.
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 thepollentube, where growth is always towards the ovules.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Pollen germination,pollentubeentry, and double fertilization processes have all been observed to proceed normally.
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Wikipedia
This example is from Wikipedia and may be reused under a CC BY-SA license.Germination and growth of thepollentubeinvolve molecular signaling between stigma and pollen.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Further studies are needed to clarify how the pollen wall andpollentubeare formed.
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This example is from Wikipedia and may be reused under a CC BY-SA license.The presence of multiple grains of pollen has been observed to stimulate quickerpollentubegrowth in some plants.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Nevertheless, several aspects have already been identified as central in the process ofpollentubegrowth.
FromThis example is from Wikipedia and may be reused under a CC BY-SA license.
Wikipedia
This example is from Wikipedia and may be reused under a CC BY-SA license.Thepollentubepasses through the pollen grain wall by way of structures called apertures.
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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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