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| Registros recuperados: 21 | |
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| Leite,Germano Leão Demolin; Picanço,Marcelo; Guedes,Raul Narciso Carvalho; Ecole,Carvalho Carlos. |
| The objective of this work was to determine the effects of rainfall, temperature, predators, parasitoids, plant age, leaf chemical composition, levels of leaf nitrogen and potassium, besides density of leaf trichomes, on attack intensity of Bemisia tabaci biotype B on the Cucumis sativus. An increase in the number of whitefly adults and nymphs per leaf was observed with plant aging. A higher number of whitefly adults per leaf and eggs cm-2 was verified in the apical part than in the middle and bottom part of the plants canopy. However, the higher number of whitefly nymphs was observed in the mid-part than in the apical and bottom part of the plant canopy. The incidence of whitefly nymphs was negatively affected with foliar nitrogen. Pentacosane and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis sativus; Whitefly; Allelochemicals; Nitrogen; Trichomes. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2006000800005 |
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| Leite,Germano L.D; Picanço,Marcelo; Zanuncio,José C; Moreira,Márcio D; Jham,Gulab N. |
| Factors such as fertilization, allelochemicals, trichomes, weather, and natural enemies can influence pest populations. Thus, it is necessary to understand the factors that predispose vegetable species to pests and the role of polyculture, crop rotation, and neighboring plants. The objective of this research was to study the hosting capacity for pests of Abelmoschus esculentus (L.), Brassica oleracea L. vars. acephala and capitata, Capsicum annuum L., Cucurbita moschata (Duchesne), Cucurbita maxima Duchesne and Cucumis sativus L., Lycopersicon esculentum Mill., Solanum gilo Raddi and Solanum melongena L., and Phaseolus vulgaris L. The higher density of Bemisia tabaci (Genn.) adults on C. sativus can be due to the higher amount of pentacosane and octacosane... |
| Tipo: Journal article |
Palavras-chave: Trichomes; Allelochemicals; Nitrogen; Potassium; Insects. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000300006 |
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| Miranda, Ordilena Ferreira de; de Souza, Saulo Eduardo Xavier Franco; Milan, Rodrigo José; Bueno, Aline Borges; Almeida, Marcilio de. |
| Psychotria viridis Ruiz & Pav. (Rubiaceae) occurs naturally throughout the Amazon and it is traditionally used by indigenous communities, being incorporated into religious use in urban contexts over the last few decades. It is known and cultivated in many regions of South America for possessing valuable bioactive alkaloids. In this paper, we described P. viridis leaf morphology, anatomy and histochemistry from three populations cultivated in the southeastern Brazil, in order to identify possible adaptations to local environment and management. All plants presented terminal stipules and basic morpho-anatomical patterns of leaves, consistent with most species of the genus, as heterogeneous dorsiventral mesophyll, uniseriate epidermis, presents large... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Characterization; Alkaloid; Trichomes; Glandular duct; Domatia. characterization; Alkaloid; Trichomes; Secretory duct; Domatia.. |
| Ano: 2020 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/50369 |
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| Singhal,B.K; Baqual,M.F; Khan,M.A; Bindroo,B.B; Dhar,A. |
| Mulberry (Morus spp.) is the only silkworm (Bombyx mori L.) food plant. In Indian sub tropics, S-146 is the only popular and ruling mulberry genotype for silkworm rearing. As a result, mulberry leaf availability is always the limiting factor, and therefore, sub tropics are contributing less than 1% of the countrys total silk production compared with more than 60% under tropical conditions. Besides climatic conditions, this is due to a very limited number of mulberry genotypes available in this region for silkworm rearing. However, in the mean time, 15 mulberry genotypes viz. ‘Tr-10’,‘Chinese White’,‘K-2’,‘Sujanpur... |
| Tipo: Journal article |
Palavras-chave: Scanning electron microscopy; Stomata; Trichomes; Idioblasts; Leaf yield; Sericulture. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000200001 |
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| Carvalho,Suzane Margaret Fank-de-; Gomes,Misléia Rodrigues de Aguiar; Silva,Pedro Ítalo Tanno; Báo,Sônia Nair. |
| The leaf structure and micromorphology characterize plant species and reflex its interactions with the environment. Leaf epidermis sculptures aid high transpiration plants on light reflection. The form and distribution of epicuticular wax crystalloids are important to characterize the surface. Aiming to know the micromorphology and the ultrastructure of G. arborescens, G. pohlii and G. virgata, leaves of these Cerrado native species were collected in Brasília, Distrito Federal, Brazil, at the Olympic Center of the Universidade de Brasília and at Reserva Ecológica do Roncador. Leaves of G. globosa, an Indian native species, were also studied for comparison. Leaves were fractionated, fixed and treated for observation under optical and scanning electron... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anatomy; Epicuticular wax; Platelets; Trichomes; Stomata. |
| Ano: 2010 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452010000100004 |
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| VARGAS,WANDERLEIA DE; SARTORI,ÂNGELA L.B.; DIAS,EDNA S.. |
| A comparative anatomical study was carried out on the secretory structures of leaflets from taxa belonging to the genus Rhynchosia - taxa difficult to delimit because of uncertain interspecific relations - in order to evaluate the potential diagnostic value of these anatomical traits for taxonomic assignment. A further objective was to establish consensual denomination for these secretory structures. The new anatomical features found in these taxa were sufficiently consistent to separate the species evaluated. The presence and localization of glandular-punctate structures bulbous-based trichomes, the number of layers in the palisade parenchyma and the arrangement of vascular units distinguish the taxa investigated and these characteristics can be extended... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leaflets; Legume; Taxonomy; Trichomes. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000100083 |
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| Oriani,Maria A. de G.; Lara,Fernando M.. |
| The oviposition preference of Bemisia tabaci biotype B (Homoptera: Aleyrodidae) for bean (Phaseolus vulgaris L.) genotypes containing arcelin in the seeds was evaluated. The tests were carried out under greenhouse conditions, in the dry and wet seasons, with the following genotypes: ARC 3s, ARC 5s (wild genotypes containing arcelin in the seeds); ARC 1, ARC 2, ARC 3, ARC 4 (near isogenic lines containing arcelin in the seeds - EMBRAPA) and Porrillo 70, Bolinha, IAPAR MD 808 (commercial genotypes without arcelin). In the free choice and no-choice oviposition tests, Bolinha and Porrillo 70 genotypes were preferred for oviposition by that insect. The Bolinha susceptibility could be related to the great number of acicular trichomes presents on its leaves... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Phaseolus vulgaris; Whitefly; Antixenosis; Trichomes. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0301-80592000000300019 |
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| Zhao, Li; Denis, Michel; Barani, Aude; Beker, Beatriz; Mante, Claude; Xiao, Tian; Gregori, Gerald. |
| The composition of ultraphytoplankton (10 m) sampled in surface waters (1 m depth) was investigated during summer 2010 in the Bay of Marseille (NW Mediterranean) using flow cytometry. In addition to groups of Synechococcus, Prochlorococcus, picoeukaryotes and nanoeukaryotes, an unidentified additional cluster was observed. The particles forming this cluster had a high abundance (7 10(4) events mL(1)), with both orange and red fluorescence intensities like Synechococcus, but with a size signal larger than that of 2 m fluorospheres (beads). These unknown particles were sorted out by flow cytometry and then observed by epifluorescence microscopy: they appeared to be chain-forming microorganisms, just like trichomes of some diazotroph cyanobacteria with one... |
| Tipo: Text |
Palavras-chave: Ultraphytoplankton; Trichomes; Bay of Marseille; Flow cytometry; Cell sorting. |
| Ano: 2012 |
URL: https://archimer.ifremer.fr/doc/00372/48292/48454.pdf |
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| Estelita,Maria Emília Maranhão; Rodrigues,Ana Claudia. |
| The Cyperaceae show the ability to incorporate silicon by depositing colloidal silica, which is recorded by the occurrence of projections in the form of cones, in inner tangential walls of some epidermal cells or "silica cells". Leaves of C. ligularis and R. aberrans were analyzed through the technique of electron backscatter. Cyperus ligularis accumulates silica, in addition to "silica cells", in some stomata, trichomes and the cell walls that surround the cavities of the aerenchyma. The silica in the latter occurs in various forms; however, the cells located near the vascular bundles have conical projections, similar to those of the epidermis. Rhynchospora aberrans presents "silica cells" whose projections have tapered "satellites". In this species,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stomata; Epidermal cells; Trichomes; Cell walls. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062012000200004 |
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| Registros recuperados: 21 | |
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