Leaf Ontogeny
Mostrando 1-12 de 26 artigos, teses e dissertações.
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1. A morphological reappraisal of the immature stages and life history of Elachista synethes Meyrick (Lepidoptera, Elachistidae), an Australian leaf miner alien to Chile
ABSTRACT Elachista synethes was recently recognized as an alien species in northern Chile, where its larvae mine the rescue grass Bromus catharticus (Poaceae). In order to provide the necessary information to allow field detection of E. synethes during early ontogeny, we conducted a morphological reappraisal of the immature stages of this leaf-miner moth, ba
Rev. Bras. entomol.. Publicado em: 2015-12
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2. Efeito do nitrogênio sobre o desenvolvimento foliar e sua consequência na estrutura da copa em Senna alata (L.) Roxb. (Leguminosae) / Effect of nitrogen of leaf development and its consequences in the canopy vertical structure in Senna alata (L.) Roxb. (Leguminosae)
O tempo de vida e o desenvolvimento foliar sempre foram questões que intrigaram a humanidade, para além da questão científica, há um interesse até mesmo estético, uma vez que as folhas senescentes do hemisfério Norte e algumas do hemisfério Sul mudam sua coloração de verde para vermelho ou para um amarelo vistoso. Do ponto de vista científico o t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/10/2011
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3. Shelter building behavior of Pyrrhopyge papius (Lepidoptera: Hesperiidae) and the use of the Mayfield method for estimating survivorship of shelter-building Lepidopteran larvae
Estimating the survivorship of lepidopteran larvae in the field poses many problems, most notably the potential for monitored subjects to simply wander away. Larvae of the family Hesperiidae, however, construct and dwell in shelters built out of leaf tissue on their host plants, return to their shelters between feeding bouts, and build a predictable series o
Zoologia (Curitiba). Publicado em: 2010
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4. Ecologia das interações entre Udranomia spitzi (Lepidoptera, Hesperiidae) e formigas tendo como hospedeira Ouratea spectabilis (Ochnaceae) em um cerrado mineiro / Ecology of interactions between Udranomia spitzi (Lepidoptera, Hesperiidae) and ants on Ouratea spectabilis (Ochnaceae) in a savanna from Minas Gerais state, Brazil
Studies in multitrophic systems can serve as tools to investigate the structure and organization of ecological communities. Because it is a biome rich in multitrophic interactions, the Cerrado (tropical savanna) is a good model for the study of insect-plant interactions. Udranomia spitzi (Hesperiidae) is an endemic butterfly from Cerrado. In the immature sta
Publicado em: 2010
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5. Características anatômicas, histoquímica das estruturas secretoras e ontogenia de idioblastos da folha de Pothomorphe umbellata (L.) Miq. (Piperaceae) / Anatomical characteristics, histochemistry of the secretory structures and ontogeny of idioblasts on the leaf of Pothomorphe umbellata (L.) Miq. (Piperaceae)
Pothomorphe umbellata, commonly known as pariparoba or capeba, occurs in humid environments and is used in almost entire Brazil due to its medicinal properties. The goals of this work were to understand the leaf anatomy of P. umbellata, to perform the histochemical characterization of the secretory structures present, and to describe the ontogeny of its secr
Publicado em: 2008
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6. Ecologia de populações de Lytocaryum hoehnei (Burret) Toledo (Arecaceae) na Reserva Florestal do Morro Grande, Cotia, SP
The present study has investigated aspects of the natural history and ecology of palm Lytocaryum hoehnei. The palms were accompanied in three sites at the Reserva Florestal do Morro Grande, Cotia, SP, approximately 4 km apart from each other, during 2000, 2001, and 2002. Four ontogenetic stages were identified: 1) seedling: individuals with entire leaves, 2)
Publicado em: 2004
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7. Estudos sobre crescimento e conteudo de esteviosideo, açucares soluveis totais e proteina de folhas de Stevia rebaudiana Bert. em dois fotoperiodos
Stevia rebaudiana Bert. contains a tetracyclic diterpene glycoside, stevioside, which is three hundred times sweeter than sucrose. As such this compound is of potential economic interest. Stevioside from plant extracts may be rapidly isolated and quantified through bi-dimensional thin layer chromatography.Isolated samples may be eluted in water, with insigni
Publicado em: 1979
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8. Elevated CO2 Effects during Leaf Ontogeny (A New Perspective on Acclimation).
For many plants growth in elevated CO2 leads to reduced rates of photosynthesis. To examine the role that leaf ontogeny plays in the acclimation response, we monitored photosynthesis and some related parameters at short intervals throughout the ontogenetic development of tobacco (Nicotiana tabacum L.) leaves under ambient (350 [mu]L L-1)- and high (950 [mu]L
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9. Indole Acetic Acid Distribution Coincides with Vascular Differentiation Pattern during Arabidopsis Leaf Ontogeny1
We used an anti-indole acetic acid (IAA or auxin) monoclonal antibody-based immunocytochemical procedure to monitor IAA level in Arabidopsis tissues. Using immunocytochemistry and the IAA-driven β-glucuronidase (GUS) activity of Aux/IAA promoter::GUS constructs to detect IAA distribution, we investigated the role of polar auxin transport in vascular differe
American Society of Plant Physiologists.
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10. The Development of Microbodies (Glyoxysomes and Leaf Peroxisomes) in Cotyledons of Germinating Watermelon Seedlings 1
The ontogeny of glyoxysomes and leaf peroxisomes has been examined in the cotyledons of germinating watermelon (Citrullus vulgaris) seedlings. Organelles from the cotyledons were extracted by razor blade homogenization and microbodies were separated by sucrose density gradient fractionation. Both kinds of microbodies have the same mean equilibrium density on
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11. Expression of 1-Aminocyclopropane-1-Carboxylate Oxidase during Leaf Ontogeny in White Clover1
We examined the expression of three distinct 1-aminocyclopropane-1-carboxylic acid oxidase genes during leaf ontogeny in white clover (Trifolium repens). Significant production of ethylene occurs at the apex, in newly initiated leaves, and in senescent leaf tissue. We used a combination of reverse transcriptase-polymerase chain reaction and 3′-rapid
American Society of Plant Physiologists.
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12. Ontogeny of Photosynthetic Performance in Fragaria virginiana under Changing Light Regimes 1
Apparent photosynthesis and dark respiration were followed during development in four light environments of leaves of Fragaria virginiana Duchesne. Leaf expansion was completed more rapidly the higher the growth photon flux density and leaves senesced more quickly in high light. Maximum photosynthetic capacity coincided with the completion of blade expansion