Browsing by Author "8c74b154-f041-48ab-8e1c-253ba06a3b72"
Now showing items 1-14 of 14
-
Gianoli, Ernesto; Niemeyer, Hermann M. (Birkhauser Verlag Basel, 1998)We characterized the induction of hydroxamic acids (Hx) by aphid infestation in the wild wheat Triticum uniaristatum by addressing the following questions: i) Do different leaves have similar responses to aphid damage?, ...
-
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 ...
-
Gianoli, Ernesto; Niemeyer, Hermann M. (Springer New York LLC, 1997)Hydroxamic acids (Hx) are natural products of Gramineae that are associated with cereal resistance to pests. We aimed at characterizing the induction of Hx accumulation in seedlings of wheat. Triticum aestivum, by short-term ...
-
Collantes, Hugo G.; Gianoli, Ernesto; Niemeyer, Hermann M. (Kluwer Academic/Plenum Publishers, 1999)The effect of defoliation and consecutive defoliation (condefoliation) of rye seedlings on the allocation patterns of biomass and hydroxamic acids (Hx) was evaluated five days after treatment. Growth of condefoliated ...
-
Gianoli, Ernesto; Niemeyer, Hermann M. (Kluwer Academic Publishers, 1998)Hydroxamic acids are secondary metabolites typical of Poaceae that play a role in cereal resistance against pests and pathogens. The content of the hydroxamic acid aglucones DIBOA (2,4-dihydroxy-1,4-benzoxazin-3-one) and ...
-
Gianoli, Ernesto; Niemeyer, Hermann M. (Springer New York LLC, 1997)The effects of temperature and photoperiod on accumulation of hydroxamic acids (Hx) in wheat (Triticum aestivum L.) seedlings were evaluated under laboratory conditions. Hx concentrations were significantly higher at higher ...
-
Gianoli, Ernesto; Niemeyer, Hermann M. (Springer Verlag, 1996)The effects of temperature and photoperiod on the ability of wheat (Triticum aestivum L.) seedlings to show induced responses (increased accumulation of hydroxamic acids, Hx) upon infestation by the bird cheery-oat aphid. ...
-
Gonzáles, Wilfredo L.; Gianoli, Ernesto (2003)The preference-performance hypothesis predicts that insect preference should correspond to host suitability for offspring development. We studied the pattern of within-plant preference in the aphid Sipha flava and its ...
-
Suárez, Lorena H.; Gonzáles, Wilfredo L.; Gianoli, Ernesto (2009)Pollination is a requisite for sexual reproduction in plants and its success may determine the reproductive output of individuals. Pollinator preference for some floral designs or displays that are lacking or poorly developed ...
-
Gianoli, Ernesto; Niemeyer, Hermann M. (Blackwell Publishing Ltd, 1997)Aphid infestation triggered a significant induction of hydroxamic acids (Hx) in wild wheat Triticum uniaristatum seedlings in comparison to control seedlings. We hypothesized that indirect costs of Hx induction (expressed ...
-
Gianoli, Ernesto; Niemeyer, Hermann M. (Universite Laval, 1998)Following a short-term infestation by aphids, wheat seedlings show an increase in their concentration of hydroxamic acids (Hx), secondary metabolites conferring resistance against insects. The benefits for a wheat cultivar ...
-
Córdova-Yamauchi, Leslie; Gianoli, Ernesto; Quiroz, Andrés; Niemeyer, Hermann M. (Czech Academy of Sciences, 1998)The behavioural response of an aphid-tending ant, the Argentine ant Linepitherma humile, to semiochemicals related with spacing behaviour in the aphid Rhopalosiphum padi (L.) was used evaluated. The compounds involved were ...
-
Gianoli, Ernesto; Caillaud, Claudia M.; Chaubet, Bernard; Di Pietro, Jean Paul; Niemeyer, Hermann M. (Entomological Society of America, 1997)Aphid genotype has been shown to be a source of variability in the induction of phytochemical responses in wheat after aphid infestation as well as in their performance on wheat lines. Two clones of the aphid Sitobion ...
-
Gianoli, Ernesto; Ríos, Jenny M.; Niemeyer, Hermann M. (Birkhauser Verlag Basel, 1999)The among-leaves allocation of DIBOA, a hydroxamic acid associated with plant resistance, in the shoot of rye (Secale cereale) was evaluated over the vegetative development of the plant. The appropriateness of using the ...