hydathodes

Little Guy no more possessed hydathodes, through which he could express excess water, than he did any other means of transpirational pull.

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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 Eberhard Dennert

In order to pass any further judgment regarding it, we should have to ascertain whether the whole phenomenon is not a case of so-called adaptation; if so, processes should be found in nature, analogous to the poisoning of the hydathodes in this experiment, which result in the destruction of the hydathodes so that in consequence the plant would have gained the power of making good the loss, by means of the substitute organs.

At the Deathbed of Darwinism A Series of Papers Eberhard Dennert

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 Eberhard Dennert

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 Eberhard Dennert

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 Eberhard Dennert

As the secretion ceased the obvious conclusion to be deduced from this experiment is that the hydathodes do not act as purely mechanical filtration-apparatuses, as one might have thought, but that there is here evidence of an active vital process in the plant; the unusual term

At the Deathbed of Darwinism A Series of Papers Eberhard Dennert

Little Guy no more possessed hydathodes, through which he could express excess water, than he did any other means of transpirational pull.

365 tomorrows submission 2010

In older hyd/fk shoot tissues, ectopic expression in the cotyledon occurs in the vicinity of late-differentiating xylem, vascular islands, and in regions where the xylem trace shows poor coherence in the strand, particularly at the hydathodes (

PLoS ONE Alerts: New Articles Margaret Pullen et al. 2010