| 单词 | pollen tube |
| 释义 | > as lemmaspollen tube pollen tube n. Botany a microscopic tube formed by protrusion of the intine of a germinating pollen grain, which grows towards and conveys the fertilizing male gametes to the ovule. ΘΚΠ the world > plants > part of plant > reproductive part(s) > flower or part containing reproductive organs > [noun] > parts of > stamen or pistil > pollen and related parts sandarac1623 globulet1671 powder1672 bread1682 farina1721 pollen1723 father-dust1728 rough wax1744 yellow rain1755 dust1776 fovilla1793 anther dust1797 pollen mass1828 pollen tube1830 intextine1835 pollen grain1835 pollen granule1835 exine1839 exintine1839 intine1839 pollinium1849 sulphur shower1854 pollinic mass1857 pollen chamber1863 smoke1868 pollen sac1872 pollinarium1881 sulphur rain1882 pollinic chamber1885 perine1895 pollen content1926 sculpturing1943 monad1947 nexine1948 sexine1948 1830 J. Lindley Introd. Bot. i. ii. 133 It has nevertheless been doubted by some whether the boyau or pollen-tube is any thing more than mucus surrounding the fovilla when emitted. 1914 F. E. Fritsch & E. J. Salisbury Introd. Study Plants xix. 250 Each pollen-grain puts out a thread-like tube (the pollen tube). 1992 M. Ingrouille Diversity & Evol. Land Plants 103 The male cells or nuclei are conveyed towards the egg in a pollen tube in a process called siphonogamy. < as lemmas |
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