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| Registros recuperados: 47 | |
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| Brito, Cristiane Dantas de; Loureiro, Marta Bruno; Teles, Clarissa Abreu Santosw; Schuck, Mariane Ruzza; Fernandez, Luzimar Gonzaga; Castro, Renato Delmondez de. |
| Jatropha curcas is an oil-rich Euphorbiaceae seed species renowned for its apparent tolerance to environmental stresses. It is considered a promising source of renewable feedstock for biodiesel production in the Brazilian semiarid region where crop establishment requires a better understanding of the mechanisms leading to proper seed and plant behavior under water restrictive conditions. This study describes physiological and cytological profiles of J. curcas seeds imbibed in water restriction conditions by means of osmotic stress or osmoconditioning. Seeds were characterized by size, weight, moisture content and dry mass, germinability, and cell cycle activation by means of tubulin and microtubule cytoskeleton accumulation. Osmoconditioning at -0.8 MPa... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.00.00.00-4; 5.01.03.06-7; 5.01.03.03-2 Jatropha sp.; Germination; Drought stress; Cell cycle Ciências Agrárias. |
| Ano: 2015 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19438 |
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| VALLE, L. da C. S.; VALERIO, J. R.; SOUZA, O. C. de; FERNANDES, C. D.; CORRÊA, E. S.. |
| Extensas áreas, da ordem de centenas de hectares, com pastagens secas e mortas foram vistoriadas no Estado do Mato Grosso compreendendo os municípios de Barra do Garças, Água Boa, Canarana e São Jose de Xingu, durante o período de 22 a 28 de novembro de 1999. Por meio de observações de campo, concluiu-se que a morte dessas pastagens foi resultante de um complexo de causas associadas a degradação das pastagens, assim como ambiental. Entretanto, o estresse hídrico ocorrido nos anos de 1998 e 1999. possivelmente em função de distúrbios climáticos globais, pode ter sido o responsável principal pela morte das pastagens naquelas localidades. |
| Tipo: Folhetos |
Palavras-chave: Degradação; Mato Grosso; Brasil; Pasture deterioration; Plant diseases; Drought stress; Brachiaria Brizantha; Deficiência Hídrica; Deterioração; Doença de Planta; Pastagem; Praga de Planta; Brazil; Pastures; Weeds. |
| Ano: 2000 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/324218 |
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| Pino,María Teresa; Ávila,Andrea; Molina,Andrea; Jeknic,Zoran; Chen,Tony H.H. |
| Cultivated potato crops are sensitive to drought stress, reducing yield and tuber quality when the soil water potential drops to -0.3 MPa. However, drought not only affects plant growth and physiological activity, but this stress also induces biochemical and molecular changes in the cellular gene expression profile. triggering genes that play a direct role in plant protection and gene regulation. The genes involved in regulation include C-repeat Binding Factors/Dehydration responsive element binding (CBF/DREB) transcription factors, which increase cold, drought and salt tolerance in different plant species. The aim of this research was to evaluate whether the overexpression of the ScCBF1 gene from Solanum commersonii enhances drought stress tolerance in... |
| Tipo: Journal article |
Palavras-chave: CBF gene; Drought stress; In vitro; Potato; Solanum commersonii; Solanum tuberosum. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000100015 |
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| GARCIA,LETÍCIA C.; BARROS,FERNANDA V.; LEMOS-FILHO,JOSÉ P.. |
| ABSTRACT Banded iron formations (BIF) have a particular vegetation type and provide a good model system for testing theories related to leaf phenology, due to unique stressful environmental conditions. As a consequence of the stressful conditions of BIF environment, we hypothesize that most species would retain at least some significant canopy cover, even at the end of the dry season, independently of growth form - trees, shrubs, and sub-shrubs. Considering the strong seasonality, we also hypothesize that photoperiod and rainfall act as triggers for leaf fall and leaf flushing in these environments. The majority of the fifteen studied species had a semi-deciduous behavior and shed their leaves mainly during the dry season, with a recovery at the end of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Canga; Day length; Drought stress; Evergreen; Leaf shedding; Tropical ecosystems. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000100131 |
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| Santos,Tiago Benedito Dos; Lima,Rogério Barbosa de; Nagashima,Getúlio Takashi; Petkowicz,Carmen Lucia de Oliveira; Carpentieri-Pípolo,Valéria; Pereira,Luiz Filipe Protasio; Domingues,Douglas Silva; Vieira,Luiz Gonzaga Esteves. |
| Increased synthesis of galactinol and raffinose family oligosaccharides (RFOs) has been reported in vegetative tissues in response to a range of abiotic stresses. In this work, we evaluated the transcriptional profile of a Coffea canephora galactinol synthase gene (CcGolS1) in two clones that differed in tolerance to water deficit in order to assess the contribution of this gene to drought tolerance. The expression of CcGolS1 in leaves was differentially regulated by water deficit, depending on the intensity of stress and the genotype. In clone 109A (drought-susceptible), the abundance of CcGolS1 transcripts decreased upon exposure to drought, reaching minimum values during recovery from severe water deficit and stress. In contrast, CcGolS1 gene expression... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffee; Drought stress; Raffinose family oligosaccharides (RFOs). |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000200182 |
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| Oliveira,Eder Jorge de; Aidar,Saulo de Tarso; Morgante,Carolina Viana; Chaves,Agnaldo Rodrigues de Melo; Cruz,Jailson Lopez; Coelho Filho,Maurício Antônio. |
| The objective of this work was to evaluate the effect of drought on genetic parameters and breeding values of cassava. The experiments were carried out in a completely randomized block design with three replicates, under field conditions with (WD) or without (FI) water deficit. Yield of storage roots (RoY), shoot (ShY), and starch (StY), as well as the number of roots (NR), and root dry matter content (DMC) were evaluated in 47 cassava accessions. Significant differences were observed among accessions; according to heritability, these differences had mostly a genetic nature. Heritability estimates for genotypic effects () ranged from 0.25±0.12 (NR) to 0.60±0.18 (DMC), and from 0.51±0.17 (NR) to 0.80±0.21 (RoY and StY) for WD and FI, respectively, as a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manihot esculenta; Breeding; Drought stress; Germplasm.. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015000300233 |
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| Picoli,Michelle Cristina Araujo; Duft,Daniel Garbellini; Machado,Pedro Gerber. |
| Abstract: The objective of this work was to evaluate the potential of several spectral indices, used on moderate resolution imaging spectroradiometer (Modis) images, in identifying drought events in sugarcane. Images of Terra and Aqua satellites were used to calculate the spectral indices, using visible (red), near infrared, and shortwave infrared bands, and eight indices were selected: NDVI, EVI2, GVMI, NDI6, NDI7, NDWI, SRWI, and MSI. The indices were calculated using images between October and April of the crop years 2007/08, 2008/09, 2009/10, and 2013/14. These indices were then correlated with the standardized precipitation-evapotranspiration index (SPEI), calculated for 1, 3, and 6 months. Four of them had significant correlations with SPEI: GVMI,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum officinarum; Drought stress; Image processing; Satellite imagery; SPEI; Warning systems. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001101063 |
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| Registros recuperados: 47 | |
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