Browsing by Author "b104d8fb-0aa8-4667-a1d4-76fd56130f08"
Now showing items 1-20 of 22
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Muñoz Muñoz, Orlando; Argandoña, Víctor H.; Corcuera, Luis J. (1998)Stress, pathogens or insects induce profound changes in the expression of the chemical constituents of plants. Some of these changes could be adaptations to the new conditions or the expression of new defensive characteristics. ...
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Dabed, Rebeca G.; Toral Ponce, María; Corcuera, Luis J.; Niemeyer, Hermann M. (1983)
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Zúñiga Navarro, Gustavo; Argandoña Cortés, Víctor; Corcuera, Luis (1989)The concentration of proline was found to be similar in the epidermis, the vascular bundles and mesophyll parenchyma protoplasts of barley seedlings. In stressed leaves, proline was accumulated mainly in the vascular bundles ...
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Argandoña, Victor H.; Zuñiga, Gustavo E.; Corcuera, Luis J. (1987)The first leaf of 12-day-old barley seedlings, contained 1.3 μmol/g fr. wt gramine while the concentrations were 2.2, 2.0 and 3.1 μmol/g fr. wt in lower and upper epidermis and mesophyll parenchyma, respectively. Gramine ...
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Argandoña, Victor H.; Corcuera, Luis J. (1985)The hydroxamic acid content of leaves of cereals correlates well with resistance to aphids. In maize these compounds were absent from xylem exudates and guttation drops. Lateral veins of leaves of 7-day-old maize plants ...
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Argandoña, Victor H.; Niemeyer, Hermann M.; Corcuera, Luis J. (1981)The content of hydroxamic acids in wheat plants shows substantial variations between different species and cultivars (1.0-6.3 mmol/kg fr. wt). It also varies with the age of the plant and the organ assayed. The maximum ...
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Argandon̄a, Victor H.; Pen̄a, Gabriel F.; Niemeyer, Hermann M.; Corcuera, Luis J. (1982)Toxicity of DIMBOA, the major cyclic hydroxamic acid in maize extracts, to the aphid Schizaphis graminum, was decreased by addition of cysteine to the insect diet. The ld50 for DIMBOA on aphids was, after 24 hr, 2.1 and ...
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Zúñiga, Gustavo E.; Corcuera, Luis J. (1986)Gramine (N,N‐Dimethyl‐3‐aminomethylindole) content in various barley cultivars varied from 0 to 2.6 mmoles/kg fresh weight. Those cultivars which were lacking gramine were the most susceptible to the aphid Rhopalosiphum ...
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Effect of gramine on the feeding behavior of the aphids Schizaphis graminum and Rhopalosiphum padi Zúñiga, Gustavo E.; Varanda, Elenice M.; Corcuera, Luis J. (1988)The effects of the indole alkaloid gramine on the behavior of the aphids Schizaphis graminum and Rhopalosiphum padi feeding on barley seedlings and on artificial diets were studied. On barley cv. F. Union, which lacks ...
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Marino Cabrera, Hernán; Argandoña Cortés, Victor; Zúñiga Navarro, Gustavo; Corcuera, Luis (1995)To compare the effects of aphid infestation with some effects of wounding and drought-stress, several physiological parameters and metabolite concentrations were measured in infested, mechanically wounded or water-stressed ...
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Corcuera, Luis J. (1984)The indole bases N∞-methyltryptamine, 5-methoxy-N, N-dimethyltryptamine, 3-N,N-dimethylaminomethylindole (gramine) and 5-methoxytryptamine decreased survival of nymphs of Rhopalosiphum maidis with LD50 of 3.8, 3.5, 2.9 and ...
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Zúñiga Navarro, Gustavo; Corcuera Pérez, Luis (Pergamon-Elsevier, 1987)Water deficit increased susceptibility of barley to the aphid Schizaphis graminum. Proline and glycine-betaine accumulated in the stressed plants. These compounds were incorporated into artificial diets to test their effects ...
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Zúñiga, Gustavo E.; Argandoña, Víctor H.; Niemeyer, Hermann M.; Corcuera, Luis J. (1983)The content of two hydroxamic acids, 2,4-dihydroxy-1,4-benzoxazin-3-one (DIBOA) and 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA), in cultivated and wild species of Gramineae was determined. Zea mays and Triticum ...
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Velozo, Juan A.; Alvarez, Rodrigo I.; Wächter, Gerald A.; Timmermann, Barbara N.; Corcuera, Luis J. (Elsevier Ltd, 1999)The kinetics of accumulation of gramine were measured in three aphid infested and non-infested cultivars of barley (Hordeum vulgare; cvs. Frontera, Libra and Acuario). After 6 days of infestation gramine content increased ...
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Chaman Medina, Mercedes; Corcuera, Luis; Zúñiga Navarro, Gustavo; Cardemil Oliva, Liliana; Argandoña Cortés, Víctor (2001)Peroxidase enzymes have been found in soluble, ionically bound, and covalently bound forms and have been implicated in several physiological processes in plants. This paper investigates the effect of aphid infestation ...
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Queirolo, Carlos B.; Andreo, Carlos S.; Niemeyer Marich, August; Corcuera, Luis J. (1983)-DIMBOA (2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one), a hydroxamic acid from the Gramineae involved in the resistance of cereals to aphids, inhibits. © 1983.
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Zún ̃iga, Gustavo; Fernandez, Julio; Cristi, Raul; Alberdi, Miren; Corcuera, Luis (1990)Barley seedlings were subjected to water and cold stress, and the composition of lipid fractions and the accumulation of several low molecular weight metabolites in leaves determined. Proline, glycine-betaine and the total ...
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Peñaloza, Enrique; Muñoz, Gastón; Salvo-Garrido, Haroldo; Silva, Herman; Corcuera, Luis J. (2005)Proteoid roots play a major role in enabling white lupin (Lupinus albus L.) to adapt to phosphate (Pi) deficiency. Such roots release citrate from proteoid rootlets, which allows this species to mobilize Pi from sparingly ...
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Casaretto, Jose A.; Corcuera, Luis J. (1998)Proteinase inhibitors (chymotrypsin and trypsin inhibitors) accumulation in barley leaves was studied when the plants were infested with the aphids Schizaphis graminum and Rhopalosiphum padi. Aphid infestation resulted ...
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Niemeyer Marich, August; Corcuera, Luis J.; Pérez, Francisco J. (1982)An insect inhibitor isolated from maize extracts, 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA), reacted with cysteine, mercaptoethanol, ethane. © 1982.