. Elementary plant physiology. Plant physiology. Exchange and Movements of Gases and Liquids. 65 57. Structure of a leaf of a mesophytic plant.— Examine the leaf of any convenient mesophytic species, such as clover {Trifoliuni), beech [Fagtis), apple {Malus), oak ( Quercus). Place a few leaves in alcohol to extract the chlo- rophyl, then trace the ramifications of the nerves. Make dia- gram of same. Cut a thin cross-section of the petiole, and note the formation of the bundles. Cut a thin cross-section of part of the blade. Note the arrangement of cells contiguous to the. Fi^. 4T.—Transverse s
. Elementary plant physiology. Plant physiology. Exchange and Movements of Gases and Liquids. 65 57. Structure of a leaf of a mesophytic plant.— Examine the leaf of any convenient mesophytic species, such as clover {Trifoliuni), beech [Fagtis), apple {Malus), oak ( Quercus). Place a few leaves in alcohol to extract the chlo- rophyl, then trace the ramifications of the nerves. Make dia- gram of same. Cut a thin cross-section of the petiole, and note the formation of the bundles. Cut a thin cross-section of part of the blade. Note the arrangement of cells contiguous to the. Fi^. 4T.—Transverse section of leaf of Tri/olium praiense. o. J, upper surface ; w J, under surface; o^ epidermis ; j/i, stoma ; oca, crystals; hlz, wood of fibro- vascular bundles ; g^ vessels ; wb^ phloem ; b/, bast fibers. After De Vries. fibrovascular bundles. ^\'hat differences are to be found in the arrangement of the cells on the upper and lower sides of the leaf ? Take thin sections from the upper and lower surfaces. Estimate the number of stomata per square centimeter in both places, by the use of an eye-piece micrometer. 58. Structure of a xerophytic leaf.—ILxamine the surface, structure, and arrangement of the tissues of some spe- cies adapted to living under arid conditions, or in a situation in which transpiration is to be restricted. Russian thistle 5. 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 MacDougal, Daniel Trembly, 1865-1958. New York, London [etc. ] Longmans, Green, and Co.
Size: 1881px × 1329px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectplantph, bookyear1902
