Consulta: subjectFacets:"Leaf age"
Registros recuperados: 3
Data/hora: 12/06/2024 08:31:36

Effect of host age on the oviposition and performance of Ascia monuste Godart (Lepidoptera: Pieridae)
Provedor de dados: Neotropical Entomology
Autores: Bittencourt-Rodrigues,Rebecca de S.; Zucoloto,Fernando S.
Ascia monuste Godart, known as the kale caterpillar, has a specialized diet on Brassicaceae and represents one of the main herbivores of this family in the Neotropical region. The objective of the present study was to determine the performance and oviposition preference of A. monuste for common kale Brassica oleracea (Brassicaceae, var. acephala) of different ages. The parameters used to assess performance were time to pupation and emergence, emergence rate, digestive indices, relative consumption and growth rates, number of eggs per female, hatching rate, and weight of the imagoes. Chemical and physical properties of young and old kale leaves were determined. In general, caterpillars feeding on new leaves showed better performance than those feeding on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Insecta; Oviposition preference; Leaf age; Feeding behaviour.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2005000200004

Gas exchange and plant growth after defoliation on Leandra lacunosa, a cerrado woody species with continuous leaf production
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Damascos,Maria Angélica; Ronquim,Carlos Cesar; Prado,Carlos Henrique Britto Assis.
Morphological and physiological leaf traits were studied on control and defoliated potted Leandra lacunosa young plants. After defoliation, remaining bottom leaves showed no significant change in net photosynthesis and stomatal conductance values with time, but the leaf transpiration rate was higher. The production of the new leaves was greater after defoliation in top defoliated plants. Bottom defoliated plants increased stem extension rates and net photosynthesis transitorily. Two months after defoliation, control and defoliated plants did not differ in stem length and root dry mass values. In spite of smaller area and photosynthetic capacity, remaining bottom leaves were able to compensate top leaves elimination. The effectiveness of this compensatory...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Compensatory photosynthesis; Herbivory; Leaf age; Leaf phenology; Leandra lacunosa.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000800013

Intensity of bitterness of processed yerba mate leaves originated in two contrasted light environments
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Rakocevic,Miroslava; Medrado,Moacir José Sales; Lucambio,Fernando; Valduga,Alice Teresa.
The bitterness intensity of beverage prepared from the leaves produced on the males and females of yerba mate (Ilex paraguariensis), grown in the forest understory and monoculture, was evaluated. The leaves were grouped by their position (in the crown and on the branch tips) and by the leaf age. The leaf gas exchange, leaf temperature and photosynthetic photon flux density were observed. Inter and intra-specific competition for light and self-shading showed the same effect on yerba mate beverage taste. All the shading types resulted in bitterer taste of the processed yerba mate leaves compared to the leaves originated under the direct sun exposure. The leaves from the plants grown in the monoculture showed less bitterness than those grown in the forest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaf age; Photosynthesis; Shade; Stomatal conductance; Temperature; Transpiration.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000300018