. Plant anatomy from the standpoint of the development and functions of the tissues, and handbook of micro-technic. Plant anatomy. 146 CONSTRUCTION OF PLANT'S FOOD are not easily made out in cross sections of leaves, but in sec- tions parallel to the leaf surface (tangential sections), or when looking through a bleached leaf with a microscope, they appear as in Fig. 77, where every palisade cell borders on one or more of them for a part of its. surface. This general view of leaf anat- omy shows how all the parts are related in the interest of Fig. 78.—Diagram to show the archi
. Plant anatomy from the standpoint of the development and functions of the tissues, and handbook of micro-technic. Plant anatomy. 146 CONSTRUCTION OF PLANT'S FOOD are not easily made out in cross sections of leaves, but in sec- tions parallel to the leaf surface (tangential sections), or when looking through a bleached leaf with a microscope, they appear as in Fig. 77, where every palisade cell borders on one or more of them for a part of its. surface. This general view of leaf anat- omy shows how all the parts are related in the interest of Fig. 78.—Diagram to show the architecture of a typical leaf in the region of one of the lateral veins. The shaded parts amongst the palisade and spongy parenchyma represent intercellular spaces. It will be well now to recapitulate -briefly the main facts in what has thus far been told about the leaf: The epidermis is transparent and lets the light through. The chloroplasts in the palisade cells absorb most of the light and use approxi- mately 2 per cent, of its energy in carrying on food synthesis. Light that escapes through the palisade parenchyma is arrested so completely by the spongy tissue that not enough goes on through the leaf to be useful to other leaves. The intercellular spaces of the spongy parenchyma receive and distribute to all. 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 Stevens, William Chase, 1861-. Philadelphia, P. Blakiston's Son
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectplantanatomy, bookyea
