Browsing by Subject "Zea mays"

Now showing items 1-7 of 7

    • Changes in growth and chemical defences upon defoliation in maize 
      Collantes, Hugo G.; Gianoli, Ernesto; Niemeyer, Hermann M. (1998)
      The effect of defoliation on growth and on levels and allocation patterns of hydroxamic acids (Hx) in maize seedlings was evaluated 6 days after treatment. No significant differences were found between defoliated and ...
    • Distribution of hydroxamic acids in zea mays tissues 
      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 ...
    • Effect of cysteine on stability and toxicity to aphids of a cyclic hydroxamic acid from gramineae 
      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 ...
    • Effects of hydroxamic acids on electron transport and their cellular location in corn 
      Massardo, Francisca; Zúñiga, Gustavo E.; Ptrez, Luz M.; Corcuerat, Luis J. (1994)
      DIMBOA, the main hydroxamic acid in maize and wheat, is found mainly as a glucoside in intact maize plants; when the tissue is damaged a β-glucosidase releases DIMBOA from DIMBOA-glucoside. The effects of DIMBOA and its ...
    • Hydroxamic acid content in wild and cultivated gramineae 
      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 ...
    • Partial purification and characterization of a hydroxamic acid glucoside β-d-glucosidase from maize 
      Cuevas, Liliana; Niemeyer Marich, August; Jonsson, Lisbeth M.V. (Elsevier, 1992)
      β-Glucosidase activities measured in extracts from maize leaves during development gave different curves when p-nitrophenyl β-d-glucopyranoside (PNP-Glc) or hydroxamic acid glucoside (Hx-Glc) were the substrates. The PNP-Glc ...
    • Reaction of a cyclic hydroxamic acid from gramineae with thiols 
      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.