. Fundamentals of botany. Botany. LOSS OF WATER 45 sap, the physiological process of secretion is also of very- great importance. Moreover, on this basis we are able to account for the ascent of sap in submerged aquatic plants, like eel-grass, pond-weed, and others, where tran- spiration is not possible. In fact it may be shown, experimentally, that a leafy branch can raise water through. Fig. 35-—Experiment to show that secretory action in the cells of a leaf are able to cause the rise of liquid in a branch, when evaporation from the leaf-surfaces is impossible, i, Beaker containing solution
. Fundamentals of botany. Botany. LOSS OF WATER 45 sap, the physiological process of secretion is also of very- great importance. Moreover, on this basis we are able to account for the ascent of sap in submerged aquatic plants, like eel-grass, pond-weed, and others, where tran- spiration is not possible. In fact it may be shown, experimentally, that a leafy branch can raise water through. Fig. 35-—Experiment to show that secretory action in the cells of a leaf are able to cause the rise of liquid in a branch, when evaporation from the leaf-surfaces is impossible, i, Beaker containing solution of eosin; 2, cork; 3, inverted glass beU-jar containing water; 4, iron support. In this experiment the eosin rose rapidly in the branch. (Modified from H. H. Dixon.) the fibro-vascular bundles, even when submerged. The apparatus is set up as shown in Fig. 35, where the leafy branch, immersed in water in an inverted glass bell-jar, has the cut end of the stem in a solution of eosin or red ink. Under these conditions only secretion can operate to withdraw water from the fibro-vascular bundles, and yet the eosin will rise in the branch and into the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Gager, C. Stuart (Charles Stuart), 1872-1943. Philadelphia, P. Blakiston's son & co.
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Keywords: ., bookauthorgag, bookcentury1900, bookdecade1910, booksubjectbotany
