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Registros recuperados: 8
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Do quantitative vessel and pit characters account for ion-mediated changes in the hydraulic conductance of angiosperm xylem? Naturalis
Jansen, S.; Gortan, E.; Lens, F.; Assunta Lo Gullo, M.; Salleo, S.; Scholtz, A.; Stein, A.; Trifilò, P.; Nardini, A..
• The hydraulic conductance of angiosperm xylem has been suggested to vary with changes in sap solute concentrations because of intervessel pit properties. • The magnitude of the ‘ionic effect’ was linked with vessel and pit dimensions in 20 angiosperm species covering 13 families including six Lauraceae species. • A positive correlation was found between ionic effect and vessel grouping parameters, especially the portion of vessel walls in contact with neighbouring vessels. Species with intervessel contact fraction (FC) values < 0.1 showed an ionic effect between 2% and 17%, while species with FC values > 0.1 exhibited a response between 10% and 32%. The ionic effect increased linearly with the mean fraction of the total vessel wall area occupied...
Tipo: Article / Letter to the editor Palavras-chave: Angiosperms; Hydraulic conductivity; Intervessel pit membrane; Ionic effect; Vessel grouping; Wood anatomy; 42.41.
Ano: 2011 URL: http://www.repository.naturalis.nl/record/423644
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Growing knowledge: an overview of Seed Plant diversity in Brazil. Repositório Alice
HEIDEN, G..
2015
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Angiosperms; Biomes; Endemism; Gymnosperms; Life-forms.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1031840
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Nesting of social wasps (Hymenoptera: Vespidae) in a riparianforestofriodas Mortes in southeasternBrazil Biological Sciences
Souza, Marcos Magalhaes de; Universidade Federal de Lavras; Pires, Epifânio Porfiro; Universidade Federal de Lavras; Elpino-Campos, Abner; Universidade Federal do Rio Grande do Sul; Louzada, Júlio Neil Cassa; Universidade Federal de Lavras.
The survival of social wasp species depends on the success in founding new nests. These species can use plant species with different specific characteristics for nesting, with nest architecture varying according to the habits of those plant species. The nesting of social wasps in natural environments was studied in the period from October 2005 to September 2007 inthe rio das Mortes riparian forest, municipal district of Barroso, Minas Gerais State, Brazil, with the objective of evaluating the different types of plant substrate used by social wasps for nesting, and to investigate whether there is a relationship between nest construction type and the habits of plant species. A total of 171 colonies of social wasps belonging to 29 species were recorded, which...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Colonies; Angiosperms; Phragmocyttarus nest; Social insects; Nest architecture.
Ano: 2014 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/21460
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Pearl millet in Brazil: new approaches and prospects. Repositório Alice
SANTOS, F. G. dos; RODRIGUES, J. A. S.; SCHAFFERT, R. E.; VASCONCELLOS, C. A.; PITTA, G. V. E.; PEREIRA FILHO, I. A.; NETTO, D. A. M..
2000
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Pennisetum; Poaceae; Cyperales; Monocotyledons; Angiosperms; Spermatophyta; Plants; South America; America; Developing countries; Threshold countries; Latin America.
Ano: 2000 URL: http://www.alice.cnptia.embrapa.br/handle/doc/489159
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Phylogeny, classification and divergence times of pygmy leaf-mining moths (Lepidoptera: Nepticulidae):the earliest lepidopteran radiation on Angiosperms? Naturalis
Doorenweerd, C.; Nieukerken, E.J. van; Hoare, R.J.B..
Nepticulidae represent one of the early diverging Lepidoptera lineages, and the family currently comprises over 850 described species. The larvae of the vast majority of the species are leaf miners on Angiosperms and highly monophagous, which has led to persistent ideas on coevolution with their plant hosts. We present here a molecular phylogeny based on eight gene fragments from 355 species, representing 20 out of 22 extant Nepticulidae genera. Using two fossil calibration points, we performed molecular dating to place the origin of the family in the Early Cretaceous, before the main Angiosperm diversification. Based on our results we propose a new classification, abandoning all ranks between family and genus, aswell as subgenera to allowfor a stable...
Tipo: Article / Letter to the editor Palavras-chave: Leaf miners; Angiosperms; Classification.
Ano: 2017 URL: http://www.repository.naturalis.nl/record/648813
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Polyembryony in angiospermous trees of the Brazilian Cerrado and Caatinga vegetation Acta Botanica
Salomão,Antonieta N.; Allem,Antonio C..
The occurrence of polyembryony was investigated in 75 woody species of the Cerrado in central Brazil and the xerophilous Caatinga vegetation in northeastern Brazil. Fourteen species showed polyembryony, a type of anomalous angiospermous reproduction. Polyembryony is reported for the first time for nine genera, Astronium, Byrsonima, Cariniana, Copaifera, Hancornia, Magonia, Myracrodruon, Tabebuia, and Tapirira. The positive correlation found between polyembryony, sexual reproduction, and apomictic processes suggests that a number of angiospermous species may make regular use of multiple breeding systems.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Angiosperms; Agamospermy; Apomixis; Polyembryony; Brazilian neotropics.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062001000300007
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Shamanism or science? Anais da ABC (AABC)
GOTTLIEB,OTTO R.; BORIN,MARIA RENATA DE M.B..
The interconnection of the three organismic levels, metabolism, morphology, and biogeography, can now be amplified into a multipart architecture, introducing plant bioactivity through ethnobotany-oriented descriptions. Only via such an integrative model, the diverse organismic levels can be connected within a more holistic, realistic scheme. Construction of qualitative and quantitative models via evolutionarily conceived implantation into dahlgrenograms and Sporne indices, allows ethnobotany to acquire predictive validity. The coherence of such systems was demonstrated by comparison of the vast ethnobotanical Brazilian database by Pio Corrêa with relatively very minute databases referring to three Amazonian Indian societies.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ethnobotany; Angiosperms; Medicinal species; Edible species; Systematic trends; Evolutionary trends; Chácobo; Kayapó; Ka'apor.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652002000100010
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The adaptive value of shoot differentiation in deciduous trees and its evolutionary relevance Boletín de la Sociedad
Dörken,Veit M.; Stützel,Thomas.
Pronounced long shoot/short shoot differentiation is typical for deciduous angiosperm trees. It also occurs in a number of gymnosperms and very few evergreen angiosperm trees. The study of 719 angiosperm tree species (602 deciduous and 117 evergreen species) demonstrated that the deciduous condition is nearly always associated with shoot differentiation. Detailed measurements in 38 angiosperms showed that the leaf area of an entire short shoot equals the leaf area of a single long shoot leaf of the same species and individual. In the few cases where the leaf area of the short shoot is slightly larger than that of a single long-shoot leaf, the short shoot leaves shade each other and the projection of the short shoot equals the area of a single long shoot...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Shoot differentiation; Deciduous trees; Angiosperms; Gymnosperms; Evolution; Phytogeography.
Ano: 2009 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722009000200017
Registros recuperados: 8
Primeira ... 1 ... Última
 

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