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Physiological Botany Volume 2 book

Physiological Botany Volume 2 by George Lincoln Goodale
Physiological Botany Volume 2
Author: George Lincoln Goodale
Page Count: 202 pages
Published Date: 01 Mar 2012
Publication Country: Miami Fl, United States
Language: English
ISBN: 9781130371185
File Name: Physiological.Botany.Volume.2.pdf
Download Link: Physiological Botany Volume 2

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1885 Excerpt: ...a fountain. s "It is of the highest significance that those plants which are submerged, or those parts of plants which grow in the ground and therefore cannot lose water by transpiration, possess a cuticle which permits water and dissolved matters to pass through with comparative facility; while the parts growing in the air have a cuticle of a different quality, through which water passes on'y with difficulty, and thus they are protected from too great a loss of water" (Pfefler: Pllanzenphysiologie, i., 1881. p. 139). The amount of aqueous vapor which can escape through cuticle is very small. According to lioussingault, .005 gram of water may evaporate in one hour from one square centimeter of the rind of an apple, while from the surface of a peeled apple fifty-five times as much is lost (Agronomie, vi., 1878, p. 349). MECHANISM OF STUM ATA. '2G9 so that they may be fairly regarded as a part of the system for aerating the plant. 722. By reference to the structure of the more common kinds of leaves (see Chapter III.), it will be seen that the terminations of the delicate fibrils of the framework approach very closely to the acriferous spaces, and thus by the uninterrupted communication between the minute fibrils in the root-system, the stem-system, and the leaf-system of the plant, water which has been absorbed by the roots is brought finally to the parenchyma cells which surround the spaces under the stomata. If it evaporates from the outer side of the wall of these cells into the intereellular spaces, the water may make its escape through the stomata. 723. Stomata are not mere epidermal rifts having an aperture of unvarying width. The guardian cells of a stoma are so arranged with respect to each other and the proper epidermal cells contiguous to ...

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