NOUN
- (botany) a slender tubular outgrowth from a pollen grain when deposited on the stigma for a flower; it penetrates the style and conveys the male gametes to the ovule
How To Use pollen tube In A Sentence
- In the new study, the researchers surveyed more than 2,000 proteins expressed on synergid cells to clinch the exact molecules luring pollen tubes to the embryo sac. Science News / Features, Blog Entries, Column Entries, Issues, News Items and Book Reviews
- In several cases the pollen tubes emerged and elongated rapidly, then burst, with the cytoplasm streaming out of the burst tip.
- The number of pollen tubes and ovules in the ovaries of each of six dissected pistils from each cross is shown.
- The results presented suggest that in normal growing pollen tubes, a net exocytic flow occurs in the flanks of the tube apex mediated by SYP124. BioMed Central - Latest articles
- Transmitted light micrographs of the same samples (H and J) show GUS activity in pollen tubes.
- No differences were noted in pollen germination, pollen tube growth or fertilization between experimental tests of xenogamy and geitonogamy in S. mucugensis.
- Within the ovary, pollen tubes also grew in the ECM to penetrate the micropyle and subsequently grew intercellularly within the nucellus up to the embryo sac.
- The ovule micropyle and embryo sac were penetrated equally by cross- and self-pollen tubes.
- The path of pollen tubes has not been investigated, as male flowers were not available.
- It remains to be studied exactly how the pollen tubes reach the micropyle of the ovules.
