Pearl Millet (Pennisetum americanum (L.) Leeke) and Grain Sorghum (Sorghum bicolor (L.) Moench) Ultrastructure

Zeleznak, K and Varriano-Marston, E (1982) Pearl Millet (Pennisetum americanum (L.) Leeke) and Grain Sorghum (Sorghum bicolor (L.) Moench) Ultrastructure. American Journal of Botany, 69 (8). pp. 1306-1313.

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Abstract

Ultrastructural features of pearl millet (Pennisetum americanum (L.) Leeke) and grain sorghum (Sorghum bicolor (L.) Moench) caryospses were investigated with thin sections of the dry, mature grain in the transmission electron microscope, and fractured kernels in the scanning electron microscope. The pericarp of those grains is comprised of three distinct layers: epicarp, mesocarp of parenchyma cells, and endocarp of compressed cross and tube cells. Mesocarp cells of grain sorghum contain starch granules embedded in a cytoplasmic matrix. The major constituent of sorghum and millet aleurone cells are aleurone grains (protein bodies) and lipid bodies. Subaleurone cells contain a much higher proportion of protein bodies than starch granules, and the protein bodies are structurally distinct from those in the aleurone. The germ scutellar ultrastructures of the two grains were similar; protein bodies, lipid bodies, epidermal cells and parenchyma cells of the germ are described.

Item Type: Article
Author Affiliation: Department of Grain Science and Industry, Kansas State University, Manhattan, Kansas 66506
Subjects: Plant Production > Croping Systems
Crop Improvement
Plant Physiology and Biochemistry > Plant Physiology
Social Sciences > Plant Physiology and Biochemistry > Plant Physiology
Divisions: Millet
Depositing User: Library ICRISAT-InfoSAT
Date Deposited: 28 Mar 2012 07:58
Last Modified: 28 Mar 2012 07:58
Official URL: http://www.jstor.org/stable/2442755
URI: http://eprints.icrisat.ac.in/id/eprint/4259

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