Browsing by Author "Argandoña, Victor H."
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Bravo, Héctor R.; Copaja, Sylvia V.; Argandoña, Victor H. (2004)Natural hydroxamic acids and related compounds derived from the 1,4-benzoxazin-3-one structure show antifeedant activity against the aphid Rhopalosiphum padi. This antifeeding activity is based on the electrophilic character ...
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Bravo, Héctor R.; Villarroel, Elisa; Copaja, Sylvia V.; Argandoña, Victor H. (Verlag der Zeitschrift fur Naturforschung, 2008)Germination inhibition activity of N-aryl hydroxamic acids and acetanilide analogues was measured on lettuce seeds (Lactuca sativa). Lipophilicity of the compounds was determined by HPLC. A correlation between lipophilicity ...
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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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Soule, Silvia; Güntner, Carlos; Vázquez, Alvaro; Argandoña, Victor H.; Ferreira, Fernando; Moyna, Patrick (Kluwer Academic/Plenum Publishers, 1999)Common Solanum glycosides were tested against a non-Solanum pest, the greenbug, Schizaphis graminum, fed by artificial diet supplemented with the tested compounds. In contrast with the potato aphid Macrosiphum euphorbiae, ...
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Zúñiga, Gustavo E.; Copaja, Sylvia V.; Bravo, Hector R.; Argandoña, Victor H. (1990)Hydroxamic acids were quantified by HPLC in leaves of one-week-old seedlings and in 30 day-old callus tissues of four wheat cultivars. Leaves accumulated preferentially 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA). ...
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Argandoña, Victor H.; Faini, Francesca (1993)The concentration of the triterpene oleanolic acid in leaves of Baccharis linearis varies at different stages of plant growth from 1.9 to 3.0 g kg-1 fr. wt. Larvae of Heliothis zea, starved with 1.4 mg of oleanolic acid ...
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Chaman, Mercedes E.; Copaja, Sylvia V.; Argandoña, Victor H. (2003)It has been suggested that salicylic acid (SA) is a signal in acquired resistance to pathogens in several plants. Also, it has been suggested that infestation of plants causes an increase in the activity of phenylalanine ...
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Cabrera Arana, Hernan Marino (Universidad de Chile, 1994)
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Argandoña, Victor H.; Luza, Juvenal G.; Niemeyer, Hermann M.; Corcuera, Luis J. (1980)Hydroxamic acid concentration in Gramineae, both natural and incorporated, correlates with resistance to the aphid Metopolophium dirhodum. 2,4-Dihydroxy-7-methoxy-2H-1,4-benzoxazin-3(4H)-one, a hydroxamic acid isolated ...