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| Gallinari,Rafael Henrique; Coletta,Rafael Della; Araújo,Pedro; Menossi,Marcelo; Nery,Mariana Freitas. |
| Abstract Hemicellulose and cellulose are essential polysaccharides for plant development and major components of cell wall. They are also an important energy source for the production of ethanol from plant biomass, but their conversion to fermentable sugars is hindered by the complex structure of cell walls. The glucuronic acid substitution of xylan (GUX) enzymes attach glucuronic acid to xylan, a major component of hemicellulose, decreasing the efficiency of enzymes used for ethanol production. Since loss-of-function gux mutants of Arabidopsis thaliana enhance enzyme accessibility and cell wall digestion without adverse phenotypes, GUX genes are potential targets for genetically improving energy crops. However, comprehensive identification of GUX in... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: GUX; Sugarcane; Phylogeny; Angiosperms; Biofuels. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572020000100602 |
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| 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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| 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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| 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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| 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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| 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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