Nitrate uptake and metabolism by roots of soybean plants under oxygen deficiency.
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چکیده
منابع مشابه
Nitrate Reductase in Barley Roots under Sterile, Low Oxygen Conditions.
Levels of nitrate reductase activity (EC 1.9.6.1.) as high as 11 mumoles nitrite produced/hour gram fresh weight were found in barley (Hordeum vulgare cv. Compana) roots grown under low oxygen conditions. Roots of plants given identical treatment under sterile conditions did not develop the high levels of nitrate reductase activity. The results suggest that the buildup of particulate, reduced v...
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Fatty acid composition of old and new roots was determined for soybeans (Glycine max [L.] Merr. cv Ransom) at root-zone temperatures of 14, 18, and 22 degrees C during a 26-day period. New roots had a greater concentration of polyunsaturated fatty acids than old roots. The ratio of polyunsaturated to saturated fatty acid concentration in new roots exposed to 14 and 18 degrees C peaked at 16 day...
متن کاملOxygen Deficiency in Plants
Plants, under natural or experimental conditions, can be subject to a range of O 2 concentrations from normal (normoxia) through deficient (hypoxia) to total absence (anoxia). Many metabolic processes are affected by O 2 deficiency but the most studied events are those related to respiration and metabolism of N. In the absence of a terminal electron acceptor for the electron transport chain, th...
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Institut für Biologie V (Ökologie/Ökotoxikologie/Ökoehemie), Rheinisch-Westfälische Technische Hochschule, Worringer Weg 1, D-52056 Aachen, Bundesrepublik Deutschland Z. Naturforsch. 49c, 719-726 (1994); received August 1/September 7, 1994 Glycine max, Triticum aestivum, 3,4-Dichloroaniline, Metabolism, Translocation The roots of 13-day-old soybean (Glycine max L.) and 7-day-old wheat ( Triticu...
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The absorption characteristics of Cd(2+) by 10- to 12-day-old soybean plants (Glycine max cv Williams) were investigated with respect to influence of Cd concentration on adsorption to root surfaces, root absorption, transport kinetics and interaction with the nutrient cations Cu(2+), Fe(2+), Mn(2+), and Zn(2+). The fraction of nonexchangeable Cd bound to roots remained relatively constant at 20...
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ژورنال
عنوان ژورنال: Brazilian Journal of Plant Physiology
سال: 2009
ISSN: 1677-0420
DOI: 10.1590/s1677-04202009000100003