pollen-tube

When placed on the stigma, under favourable circumstances, the pollen-grain puts forth a pollen-tube which grows down the tissue of the style to the ovary, and makes its way along the placenta, guided by projections or hairs, to the mouth of an ovule.

Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1 Various

In _Casuarina_, _Juglans_ and the order Corylaceae, the pollen-tube does not enter by means of the micropyle, but passing down the ovary wall and through the placenta, enters at the chalazal end of the ovule.

Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1 Various

At the period of fertilization the embryo-sac lies in close proximity to the opening of the micropyle, into which the pollen-tube has penetrated, the separating cell-wall becomes absorbed, and the male or sperm-cells are ejected into the embryo-sac.

Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1 Various

Again, the pollen-tube of the abnormal grains cracked, in its turn, on mere exposure to the air, and liberated the fovilla, so that the pollen of these atrophied anthers was necessarily impotent, because it opened before it could be applied to the stigma, even had that been rendered possible by the opening of the anther.

Vegetable Teratology An Account of the Principal Deviations from the Usual Construction of Plants Maxwell T. Masters

The gametophyte or prothallial generation is thus extremely reduced, consisting of but little more than the male and female sexual cells -- the two sperm-cells in the pollen-tube and the egg-cell (with the synergidae) in the embryo-sac.

Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1 Various

Schleiden's views on cell-formation were drawn from some rather imperfect observations on the embryo-sac and pollen-tube, but he extended his theory to cell-formation in general.

Form and Function A Contribution to the History of Animal Morphology

The male-cells are carried to their destination in the tip of the pollen-tube.

Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1 Various

Amici's subsequent (1846) discovery of the entrance of the pollen-tube into the micropyle, fertilizing the female cell which then develops into the embryo.

Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" Various

It is down these style-branches that the pollen-tube passes on its way to the ovules or embryo seeds.

The Apple-Tree The Open Country Books—No. 1 1906

No more interesting discovery stands recorded in the voluminous literature of this subject than the one originally announced by Martin Barry, afterwards discredited, and still later confirmed by Mr. Newport and others; namely the fact that the fertilizing filament reaches the interior of the ovum in various animals; -- a striking parallel to the action of the pollen-tube in the vegetable.

Complete Project Gutenberg Oliver Wendell Holmes, Sr. Works Oliver Wendell Holmes 1851