Identifier: pecanrosetteitsh1038rand (find matches)
Title: Pecan rosette : its histology, cytology, and relation to other chlorotic diseases
Year: 1922 (1920s)
Authors: Rand, Frederick Vernon, 1883-1961
Subjects: Pecan rosette Pecan
Publisher: Washington, D.C. : U.S. Dept. of Agriculture
Contributing Library: U.S. Department of Agriculture, National Agricultural Library
Digitizing Sponsor: U.S. Department of Agriculture, National Agricultural Library

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Epidermis and Sections of Pecan Leaves. A.—Epidermis of a healthy pecan leaflet collected before sunrise and stained with iodin to showthe retention of starch in the guard cells, x 540. B.— Vertical section of a pecan leaflet, show-ing a calcium oxalate crystal aggregate. X 420. C—Vertical section of a young pecan leafletcollected just after emergence from the bud, showing the differentiation of the palisade tissue atthis early stage of development. Killed in Carnoys fluid; Flemings triple stain used. X 540.D.—Horizontal section of spongy parenchyma at the margin of a yellow spot, secondary stage,stained with iodin to show the presence of starch in the green periphery but a smaller quantityor total absence of starch toward the center of the yellow area. X 540*. Photomicrographs bythe writer. Bui. 1038, U. S. Dept. of Agriculture. PLATE VIM
Text Appearing After Image:
Vertical Sections of Normal and Mottled Pecan Leaflets, Frotscher Variety. Collected in August, 1919, at Thomasville, Ga. Killed with Carnoys fluid; Flemings triple stainused. X 540. A.—Section of normal leaflet. B.—Green portion of mottled leaflet, showing theenlargement of the cells, the reduction in size of the intercellular spaces in the spongy parenchyma,and the unevenness in the arrangement of the palisade cells. Photomicrographs bythe writer. Bui. 1038. U. S. Dept. of Agri culture. Plate IX. - aKWD^M^^Ij^^JiB^SpM^M A *-./ *v 1 h0yd^ *Sc iT ^^a* x -ft*. # # rJSP I _; li J^ * .Hi ilfciii jJE. Si, mk 1 Mil - W ■. . . jfcp Br * ^ . : %jJ 1 I§1^ ••■•• 1 - * i - • d ! c ;. D _ i tI^^^^^^^^^^^^BBh t Horizontal Sections of Normal and Mottled Pecan Leaflets. A and B.—Horizontal sections through the palisade tissue illuslral ed in figures A and B of Plate VIII,showing the enlargement of the short diameter of the palisade cells in the mottled leaflet (B). Cand D.—Ho

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