Dent corn: Difference between revisions
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Dent Corn (''Zea mays'' var. ''indentata'') is similar to other many other varieties of ''Zea mays'' which is a fast-growing, vertically-erect, short-lived [[annual plant]].<ref name="OregonStateCornFactSheet">Hannaway, David B., and Larson, Christina. Oregon State University. [http://forages.oregonstate.edu/php/fact_sheet_print_grass.php?SpecID=16&use=Soil Corn (Zea mays L.)]. Retrieved 5 December 2013.</ref> More commonly grown to a height of 2-3 meters (6-9 feet), ''Zea mays'' is typically grows with a single, hollow main stem often called a stalk (or [[Culm (plant)|culm]]) which exhibits [[internode]]s that are cylindrical in the upper part, and alternately grooved on the lower part with a bud in the groove, and with one or occasionally two lateral branches in the leaf axils in the upper part of the plant.<ref name="OregonStateCornFactSheet" /> The [[Leaf|leaves]] of ''Zea mays'' alternate with broad, sword-shaped leaf blades, [[Vein (botany)|parallel veins]] with a prominent mid-rib, and small [[ligule]]s.<ref name="OregonStateCornFactSheet" /> The plant has an [[Adventitiousness#Botany|adventitious]], dense, fibrous root system that develops aerial roots at nodes near the soil surface.<ref name="OregonStateCornFactSheet" /> |
Dent Corn (''Zea mays'' var. ''indentata'') is similar to other many other varieties of ''Zea mays'' which is a fast-growing, vertically-erect, short-lived [[annual plant]].<ref name="OregonStateCornFactSheet">Hannaway, David B., and Larson, Christina. Oregon State University. [http://forages.oregonstate.edu/php/fact_sheet_print_grass.php?SpecID=16&use=Soil Corn (Zea mays L.)]. Retrieved 5 December 2013.</ref> More commonly grown to a height of 2-3 meters (6-9 feet), ''Zea mays'' is typically grows with a single, hollow main stem often called a stalk (or [[Culm (plant)|culm]]) which exhibits [[internode]]s that are cylindrical in the upper part, and alternately grooved on the lower part with a bud in the groove, and with one or occasionally two lateral branches in the leaf axils in the upper part of the plant.<ref name="OregonStateCornFactSheet" /> The [[Leaf|leaves]] of ''Zea mays'' alternate with broad, sword-shaped leaf blades, [[Vein (botany)|parallel veins]] with a prominent mid-rib, and small [[ligule]]s.<ref name="OregonStateCornFactSheet" /> The plant has an [[Adventitiousness#Botany|adventitious]], dense, fibrous root system that develops aerial roots at nodes near the soil surface.<ref name="OregonStateCornFactSheet" /> |
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The flowers of ''Zea mays'' are [[Plant reproductive morphology|monoecious]], and are born in separate parts of the plant.<ref name="OregonStateCornFactSheet" /> The female flowers, or [[Ear (botany)|ears]], are an [[inflorescence]] that develops from [[axillary bud]] [[apices]] several nodes below the stem apex.<ref name="OregonStateCornFactSheet" /> Male flowers, or tassels, develop from the stem apex.<ref name="OregonStateCornFactSheet" /> Anthers on the tassel [[Dehiscence (botany)|dehisce]] and release [[pollen]], which is dispersed by the wind (anemophilous).<ref name="OregonStateCornFactSheet" /> Ears consist of a [[corncob]], or [[rachis]], with rows of [[Sessility (botany)|sessile]] [[spikelet]]s bearing [[Corn kernels|kernels]], or [[Caryopsis|caryopses]] and tightly enveloped by several layers of ear leaves commonly called [[husk]]s.<ref name="OregonStateCornFactSheet" /> The kernels vary from variety to variety, and what distinguishes ''Zea mays'' var. ''indentata'' apart other varieties of ''Zea mays'' is the small indentation ("dent") that develops at the crown of each [[Corn kernel|kernel]].<ref name="OregonStateCornFactSheet" /> Comparatively, flint corn has a harder-textured, more rounded kernel that may display a slight depression but not a dent.<ref>U.S. Department of Agriculture |
The flowers of ''Zea mays'' are [[Plant reproductive morphology|monoecious]], and are born in separate parts of the plant.<ref name="OregonStateCornFactSheet" /> The female flowers, or [[Ear (botany)|ears]], are an [[inflorescence]] that develops from [[axillary bud]] [[apices]] several nodes below the stem apex.<ref name="OregonStateCornFactSheet" /> Male flowers, or tassels, develop from the stem apex.<ref name="OregonStateCornFactSheet" /> Anthers on the tassel [[Dehiscence (botany)|dehisce]] and release [[pollen]], which is dispersed by the wind (anemophilous).<ref name="OregonStateCornFactSheet" /> Ears consist of a [[corncob]], or [[rachis]], with rows of [[Sessility (botany)|sessile]] [[spikelet]]s bearing [[Corn kernels|kernels]], or [[Caryopsis|caryopses]] and tightly enveloped by several layers of ear leaves commonly called [[husk]]s.<ref name="OregonStateCornFactSheet" /> The kernels vary from variety to variety, and what distinguishes ''Zea mays'' var. ''indentata'' apart other varieties of ''Zea mays'' is the small indentation ("dent") that develops at the crown of each [[Corn kernel|kernel]].<ref name="OregonStateCornFactSheet" /> Comparatively, [[flint corn]] has a harder-textured, more rounded kernel that may display a slight depression but not a distinct dent.<ref>U.S. Department of Agriculture, Grain Inspection, Packers & Stockyards Administration. [http://www.gipsa.usda.gov/VRI/OF/OF_flintdent.html Visual Reference Library - Other Factors: OF-Flint & Dent Corn]. Retrieved 10 December 2013.</ref><ref>U.S. Department of Agriculture, Grain Inspection, Packers & Stockyards Administration, Federal Grain Inspection Service. [http://www.gipsa.usda.gov/Publications/fgis/handbooks/grain-insp/grbook2/corn.pdf Grain Inspection Handbook, Book II, Chapter 4 Corn] (30 July 2013), Section 4.20. Retrieved 10 December 2013.</ref> |
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Dent corn is typically cultivated as a row crop grown commercially for grain and fodder. Cultivars developed for commercial cultivation are either single or double-cross hybrids bred for special growing areas, soils or climatic conditions.<ref name="OregonStateCornFactSheet" /> |
Dent corn is typically cultivated as a row crop grown commercially for grain and fodder. Cultivars developed for commercial cultivation are either single or double-cross hybrids bred for special growing areas, soils or climatic conditions.<ref name="OregonStateCornFactSheet" /> |
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Revision as of 17:14, 10 December 2013
Dent Corn also known as Yellow Dent Corn, Reid's Yellow Dent Corn, or Field Corn (Zea mays var. indentata) is a variety of maize or corn with a high soft starch content. It received its name because of the small indentation ("dent") at the crown of each kernel on a ripe ear of corn. It is a variety developed by northern Illinois farmer James L. Reid. Reid and his father Robert Reid, moved from Brown County, Ohio to Tazewell County, Illinois in 1846 bringing with them a red corn variety known as "Gordon Hopkins", and crossed it with varieties of Flint corn and floury corn.[1] Most of today's hybrid corn varieties and cultivars are derived from it. This variety won a prize at the 1893 World's Fair.
Most of the corn grown in the United States today is Yellow Dent or a closely related variety derived from it.[2] Dent corn is the variety used in food manufacturing as the base ingredient for cornmeal flour (used in the baking of cornbread), corn chips, tortillas and taco shells. Starch derived from this high-starch content variety is turned into plastics, as well as fructose which is used as a sweetener (High-fructose corn syrup) in many processed foods and soft drinks.
Taxonomy
- Zea mays var. indentata, synonym Zea indentata Sturtev., was identified and published by American agronomist and botanist Edward Lewis Sturtevant (1842–1898).[3] It is categorized as a species within the Family Poaceae and tribe Andropogoneae—a tribe of grasses that use the NADP–malic enzyme subtype of C4 photosynthesis in carbon fixation.
Description
Dent Corn (Zea mays var. indentata) is similar to other many other varieties of Zea mays which is a fast-growing, vertically-erect, short-lived annual plant.[4] More commonly grown to a height of 2-3 meters (6-9 feet), Zea mays is typically grows with a single, hollow main stem often called a stalk (or culm) which exhibits internodes that are cylindrical in the upper part, and alternately grooved on the lower part with a bud in the groove, and with one or occasionally two lateral branches in the leaf axils in the upper part of the plant.[4] The leaves of Zea mays alternate with broad, sword-shaped leaf blades, parallel veins with a prominent mid-rib, and small ligules.[4] The plant has an adventitious, dense, fibrous root system that develops aerial roots at nodes near the soil surface.[4]
The flowers of Zea mays are monoecious, and are born in separate parts of the plant.[4] The female flowers, or ears, are an inflorescence that develops from axillary bud apices several nodes below the stem apex.[4] Male flowers, or tassels, develop from the stem apex.[4] Anthers on the tassel dehisce and release pollen, which is dispersed by the wind (anemophilous).[4] Ears consist of a corncob, or rachis, with rows of sessile spikelets bearing kernels, or caryopses and tightly enveloped by several layers of ear leaves commonly called husks.[4] The kernels vary from variety to variety, and what distinguishes Zea mays var. indentata apart other varieties of Zea mays is the small indentation ("dent") that develops at the crown of each kernel.[4] Comparatively, flint corn has a harder-textured, more rounded kernel that may display a slight depression but not a distinct dent.[5][6]
Dent corn is typically cultivated as a row crop grown commercially for grain and fodder. Cultivars developed for commercial cultivation are either single or double-cross hybrids bred for special growing areas, soils or climatic conditions.[4]
See also
References
- ^ Kansas Agricultural Extension Service. Bulletin 227: Varieties of Corn in Kansas (1921).
- ^ University of Missouri, College of Agriculture Food and Natural Resources. Division of Plant Sciences Corn Extension. Retrieved 23 July 2013.
- ^ Sturtevant, Edward Lewis. Varieties of Corn. Bulletin No. 57. (Government Printing Office, 1899).
- ^ a b c d e f g h i j k Hannaway, David B., and Larson, Christina. Oregon State University. Corn (Zea mays L.). Retrieved 5 December 2013.
- ^ U.S. Department of Agriculture, Grain Inspection, Packers & Stockyards Administration. Visual Reference Library - Other Factors: OF-Flint & Dent Corn. Retrieved 10 December 2013.
- ^ U.S. Department of Agriculture, Grain Inspection, Packers & Stockyards Administration, Federal Grain Inspection Service. Grain Inspection Handbook, Book II, Chapter 4 Corn (30 July 2013), Section 4.20. Retrieved 10 December 2013.
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