| 单词 | hydathode |
| 例句 | The free leaves possess under the outer layer, a tissue composed of large, thin-walled, water-storing cells; flat cavities on the upper side, having, furthermore, organs that secrete water, which the botanist calls hydathodes. At the Deathbed of Darwinism A Series of Papers In the first case the action of the hydathode should continue even after the treatment with the sublimate solution, while in the latter case it should not. At the Deathbed of Darwinism A Series of Papers But it does destroy it, and the hydathode dies. At the Deathbed of Darwinism A Series of Papers Even if the hydathode is treated with sublimate solution, all the conditions for mechanical filtration still remain: the earth has moisture which can be taken up by the roots so that root-pressure still exists. At the Deathbed of Darwinism A Series of Papers The water is in all cases conveyed to the hydathodes through the vascular fibres, the cell walls of the hydathodes are still adapted for filtration, and yet they do not filter. At the Deathbed of Darwinism A Series of Papers From these considerations it necessarily appears that the hydathodes are of great biological importance to the plant. At the Deathbed of Darwinism A Series of Papers The leaf no longer produces new hydathodes, but on its lower side it produces growths that function as vesicles, by means of which it continues to sustain itself. At the Deathbed of Darwinism A Series of Papers |
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