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	Provedor de dados Rev. Ciênc. Agron. (1) Rev. Bras. Frutic. (1) Autor Cavalcante,Ítalo Herbert Lucena (2) Falcão Neto,Raimundo (2) Rocha,Leonardo Fonseca da (2) Silva Júnior,Gabriel Barbosa da (2) Beckmann-Cavalcante,Márkilla Zunete (1) Cavalcante,Lourival Ferreira (1) Martins,Antonio Baldo Geraldo (1) Mais... Palavra-chave Crescimento vegetal (1) Dipteryx lacunifera Ducke (1) Esterco bovino (1) Hylocereus undatus (1) Qualidade de mudas (1) Sombreamento (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2011 (2) País Brazil (2) Idioma Português (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 99 Primeira ... 1 2 3 4 5 ... Última Irrigacao do feijoeiro. Infoteca-e AZEVEDO, J. A. de; CAIXETA, T. J.. Reune informacoes relativas a pratica da irrigacao no feijoeiro. Mostra a sua influencia na produtividade da cultura e destaca a necessidade de sua utilizacao, diante da deficiencia de agua no solo, originada das incertezas do clima nas epocas tradicionais de plantio. Discute em detalhes as reacoes do feijoeiro a periodo de deficit e de excesso de agua. Indica as fases criticas e as necessidades totais e parciais de agua. Sao descritos os criterios que, pela simplicidade de aplicacao e maior ocorrencia de resultados experimentais, permitem decidir o momento de irrigar e quantificar os volumes de irrigacao. De alguns metodos de irrigacao, entre os com possibilidade de serem usados no cultivo do feijao (irrigacao por sulcos e por aspersao), definem-se... Tipo: Circular Técnica (INFOTECA-E) Palavras-chave: Sulco; Cultivo; Bean; Deficit hídrico; Feijoeiro; Irrigation returns; Phaseolus vulgares; Sub-irrigation; Water deficit; Yield.; Deficiência Hídrica; Cerrado; Feijão; Evapotranspiração; Manejo de Água; Irrigação por Sulco; Irrigação; Irrigação por Aspersão; Produtividade; Rentabilidade; Topografia.; Evapotranspiration; Furrow irrigation; Sprinkler irrigation; Water management.. Ano: 1986 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/547470 การทดลองเปรียบเทียบผลผลิตที่ลดลงของข้าวโพดเลี้ยงสัตว์เมื่อขาดน้ำในช่วงระยะการเจริญเติบโตต่าง ๆ กัน Thai Agricultural 4 tables Palavras-chave: Corn; Maize; Water deficit; Corn growth stage; Grain yield; ข้าวโพด; การทดสอบผลผลิต; การขาดน้ำ; การเจริญเติบโต. Ano: 1986 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4395 Effects of soil water depletion on the water relations in tropical kudzu PAB Pereira-Netto,Adaucto Bellarmino de; Magalhães,Antonio Celso Novaes de; Pinto,Hilton Silveira. Tropical kudzu (Pueraria phaseoloides (Roxb.) Benth., Leguminosae: Faboideae) is native to the humid Southeastern Asia. Tropical kudzu has potential as a cover crop in regions subjected to dryness. The objective of this paper was to evaluate the effect of soil water depletion on leaflet relative water content (RWC), stomatal conductance (g) and temperature (T L) in tropical kudzu. RWC of waterstressed plants dropped from 96 to 78%, following a reduction in SWC from 0.25 to 0.17 g (H2O).g (dry soil)-1.Stomatal conductance of stressed plants decreased from 221 to 98 mmol.m-2.s-1, following the reduction in soil water content (SWC). The day after re-irrigation, g of water stressed plants was 15% lower than g of unstressed plants. Differences in T L between... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cover crop; Ecophysiology; Forage; Leguminosae; Pueraria phaseoloides; Water deficit. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999000700006 Water deficit in relation to leaf and stem anatomy of Eucalyptus camaldulensis Dehn. shoots cultivated in vitro Scientia Agricola Souza,Gustavo Maia; Gonçalves,Antonio Natal; Almeida,Marcílio de. Shoots of E. camaldulensis seedlings from three distinct provenances were submitted to three different levels of in vitro water deficit induced by the addition of sorbitol in the growth media. Transversal sections from the leaf blades and stems were anatomically analysed using the historesin inclusion technique. Shoots from the different provenances presented distinct responses to the treatments. The Gilbert River provenance was the most sensible. The basic alterations found on the anatomical structure in response to the water deficit were: cell collapse, late tissue differentiation, vascular bundle and epidermis disorganization, and alterations on the mesophyll and epidermis thickness. Tipo: Info:eu-repo/semantics/article Palavras-chave: Eucalyptus camaldulensis; Water deficit; Anatomy; Tissue culture. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161999000300030 Isolation of a cotton NADP(H) oxidase homologue induced by drought stress PAB NEPOMUCENO,ALEXANDRE LIMA; STEWART,JAMES MCD; OOSTERHUIS,DERRICK; TURLEY,RICKIE; NEUMAIER,MORMAN; FARIAS,JOSÉ RENATO BOUÇAS. The aim of this study was to identify and isolate genes that are differentially expressed in four selected cotton (Gossypium hirsutum L.) genotypes contrasting according to their tolerance to water deficit. The genotypes studied were Siokra L-23, Stoneville 506, CS 50 and T-1521. Physiological, morphological and developmental changes that confer drought tolerance in plants must have a molecular genetic basis. To identify and isolate the genes, the mRNA Differential Display (DD) technique was used. Messenger RNAs differentially expressed during water deficit were identified, isolated, cloned and sequenced. The cloned transcript A12B15-5, a NADP(H) oxidase homologue, was up regulated only during the water deficit stress and only in Siokra L-23, a drought... Tipo: Info:eu-repo/semantics/article Palavras-chave: Messenger RNA; Gene expression; Genetic transformation; Water deficit. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2000000700015 Effects of different water regimes on the anatomical characteristics of roots of grasses promising for revegetation of areas surrounding hydroelectric reservoir Ciência e Agrotecnologia Silva,Silvana da; Castro,Evaristo Mauro de; Soares,Ângela Maria. The objective of this study was to evaluate the effect of different water regimes on some aspects of root anatomy of three grasses: Echinochloa pyramidalis (canarana), Setaria anceps (setária) and Paspalum paniculatum (paspalo). The plants were cultivated in a greenhouse and submitted to three water regimes: daily watering; suspension of watering and suspension of watering followed by submersion of the root system. Segments of the middle part of the roots were taken and submitted to classical techniques in botany for slide making and tissue analysis. Anatomical differences were observed among the three grasses submitted to water regimes regarding the number of cell layers in the external cortex and thickening of lignin and suberin. The submerged roots of... Tipo: Info:eu-repo/semantics/article Palavras-chave: Revegetation; Grasses; Water deficit; Echinochloa pyramidalis; Setaria anceps; Paspalum paniculatum; Flood; Aerenchyma; Anatomical characteristics; Roots. Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542003000200020 Approximate Entropy as a measure of complexity in sap flow temporal dynamics of two tropical tree species under water deficit Anais da ABC (AABC) Souza,Gustavo M.; Ribeiro,Rafael V.; Santos,Mauro G.; Ribeiro,Henrique L.; Oliveira,Ricardo F.. Approximate Entropy (ApEn), a model-independent statistics to quantify serial irregularities, was used to evaluate changes in sap flow temporal dynamics of two tropical species of trees subjected to water deficit. Water deficit induced a decrease in sap flow of G. ulmifolia, whereas C. legalis held stable their sap flow levels. Slight increases in time series complexity were observed in both species under drought condition. This study showed that ApEn could be used as a helpful tool to assess slight changes in temporal dynamics of physiological data, and to uncover some patterns of plant physiological responses to environmental stimuli. Tipo: Info:eu-repo/semantics/article Palavras-chave: Approximate Entropy; Complexity; Sap flow; Time series analysis; Tropical ecophysiology; Water deficit. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000300015 Temporal dynamics of stomatal conductance of plants under water deficit: can homeostasis be improved by more complex dynamics? BABT Souza,Gustavo Maia; Oliveira,Ricardo Ferraz de; Cardoso,Victor José Mendes. In this study we hypothesized that chaotic or complex behavior of stomatal conductance could improve plant homeostasis after water deficit. Stomatal conductance of sunflower and sugar beet leaves was measured in plants grown either daily irrigation or under water deficit using an infrared gas analyzer. All measurements were performed under controlled environmental conditions. In order to measure a consistent time series, data were scored with time intervals of 20s during 6h. Lyapunov exponents, fractal dimensions, KS entropy and relative LZ complexity were calculated. Stomatal conductance in both irrigated and non-irrigated plants was chaotic-like. Plants under water deficit showed a trend to a more complex behaviour, mainly in sunflower that showed better... Tipo: Info:eu-repo/semantics/article Palavras-chave: Beta vulgaris; Complexity; Helianthus annus; Stability; Time series analyses; Water deficit. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000300013 Gas exchange and yield response to foliar phosphorus application in Phaseolus vulgaris L. under drought Braz. J. Plant Physiol. Santos,Mauro Guida dos; Ribeiro,Rafael Vasconcelos; Oliveira,Ricardo Ferraz de; Pimentel,Carlos. This study was conducted to evaluate the effect of foliar Pi application on gas exchange and yield of bean genotypes submitted to a mild water deficit at the pre-flowering stage. In the first experiment, when extra Pi (10 g.L-1) was sprayed on leaves during water stress or during recovery, there was no effect on gas exchange or yield in the A320, Carioca and Ouro Negro genotypes. However, net CO2 assimilation (A) of A320 and Ouro Negro was less affected, but not significantly, than Carioca at the end of the stress, when Pi was supplied five days before water deficit. In the second experiment, two different doses of Pi (10 and 20 g.Pi L-1) were sprayed five days before water deficit on the Carioca genotype. During the last three days of the mild water... Tipo: Info:eu-repo/semantics/article Palavras-chave: Common bean; Inorganic phosphorus; Photosynthesis; Water deficit. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202004000300007 Exploring drought tolerance in coffee: a physiological approach with some insights for plant breeding Braz. J. Plant Physiol. DaMatta,Fábio Murilo. This paper briefly reviews some selected traits (leaf area, crown architecture, water-use efficiency and carbon isotope discrimination, water relations and root characteristics), which may be explored in breeding programmes to tolerance to drought stress in arabica and robusta coffee. Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffea; Water deficit; Water use; Yield. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202004000100001 Eucalyptus ESTs involved in the production of 9-cis epoxycarotenoid dioxygenase, a regulatory enzyme of abscisic acid production Genet. Mol. Biol. Guerrini,Iraê A.; Trigueiro,Rodrigo M.; Leite,Regina M.; Wilcken,Carlos F.; Velini,Edivaldo D.; Mori,Edson S.; Furtado,Edson L.; Marino,Celso L.; Maia,Ivan G.. Abscisic acid (ABA) regulates stress responses in plants, and genomic tools can help us to understand the mechanisms involved in that process. FAPESP, a Brazilian research foundation, in association with four private forestry companies, has established the FORESTs database (<A HREF="https://forests.esalq.usp.br">https://forests.esalq.usp.br</A>). A search was carried out in the Eucalyptus expressed sequence tag database to find ESTs involved with 9-cis epoxycarotenoid dioxygenase (NCED), the regulatory enzyme for ABA biosynthesis, using the basic local BLAST alignment tool. We found four clusters (EGEZLV2206B11.g, EGJMWD2252H08.g, EGBFRT3107F10.g, and EGEQFB1200H10.g), which represent similar sequences of the gene that produces NCED. Data... Tipo: Info:eu-repo/semantics/other Palavras-chave: Eucalyptus EST; Abscisic acid; Water deficit; Drought resistance; NCED. Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000400020 The complexity-stability hypothesis in plant gas exchange under water deficit Braz. J. Plant Physiol. Souza,Gustavo M.; Pincus,Steven M; Monteiro,José Alberto F.. We hypothesized that more complex, i.e. irregular, temporal dynamics and a more interconnected overall network supports greater stability to gas exchange parameters (herein, CO2 net assimilation and transpiration) in plants under water deficit. To test this hypothesis two genotypes of Phaseolus vulgaris were subjected to a period of absence of irrigation, and subsequent rewatering to achieve recovery. Gas exchanges parameters were measured each 10 s during 6 h to obtain time series to evaluate complexity by Approximate Entropy (ApEn) calculations, and network connectance in each water regime. Notably, the Jalo Precoce genotype showed significantly more stability than the Guarumbé genotype under system perturbation, coincident with greater irregularity in... Tipo: Info:eu-repo/semantics/article Palavras-chave: Approximate Entropy; Complexity; Network connectance; Plant stress theory; Photosynthesis; Temporal dynamics; Water deficit. Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202005000400004 Asymmetrical leaves induced by water deficit show asymmetric photosynthesis in common bean Braz. J. Plant Physiol. Souza,Gustavo Maia; Viana,Juliana de Oliveira Fernandes; Oliveira,Ricardo Ferraz de. In this study we tested the hypothesis that leaf asymmetric growth induced by water deficit in common bean (Phaseolus vulgaris L.) might be correlated with different net photosynthesis rates between the two opposed leaflets (right and left) considering a bilateral symmetric plane. In order to induce developmental instability, the drought-sensitive common bean genotype "Jalo Precoce" was subjected to periods of suspended irrigation during its vegetative growth. Developmental instability was evaluated by measurements of leaflets asymmetry, and the effects of drought on gas exchanges were taken in both symmetrical leaflets (right and left) in relation to the central leaflet. Water deficit induced an increase of 80 % in leaf asymmetry. Net photosynthesis of P.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Developmental instability; Leaf symmetry; Water deficit. Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202005000200005 Impacts of drought and temperature stress on coffee physiology and production: a review Braz. J. Plant Physiol. DaMatta,Fábio M.; Ramalho,José D. Cochicho. Overall, drought and unfavourable temperatures are the major climatic limitations for coffee production. These limitations are expected to become increasingly important in several coffee growing regions due to the recognized changes in global climate, and also because coffee cultivation has spread towards marginal lands, where water shortage and unfavourable temperatures constitute major constraints to coffee yield. In this review, we examine the impacts of such limitations on the physiology, and consequently on the production of mainly Coffea arabica and C. canephora, which account for about 99 % of the world coffee bean production. The first section deals with climatic factors and the coffee plant’s requirements. The importance of controlling oxidative... Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffea; Chilling; Frost; Heat; Photosynthesis; Water deficit; Water use; Yield. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000100006 Leaf water potential, gas exchange and chlorophyll a fluorescence in acariquara seedlings (Minquartia guianensis Aubl.) under water stress and recovery Braz. J. Plant Physiol. Liberato,Maria Astrid Rocha; Gonçalves,José Francisco de Carvalho; Chevreuil,Larissa Ramos; Nina Junior,Adamir da Rocha; Fernandes,Andreia Varmes; Santos Junior,Ulysses Moreira dos. The physiological performance of acariquara (Minquartia guianensis) seedlings submitted to water deficit and the recovery of physiological parameters during rehydration were investigated in a greenhouse experiment. The analyzed parameters were: leaf water potential, gas exchange and chlorophyll a fluorescence. After thirty-five days, non-irrigated plants exhibited a leaf water potential 70 % lower compared to control plants (irrigated daily) and the stomatal conductance reached values close to zero, inducing a severe decrease in gas exchange (photosynthesis and transpiration). Six days after the beginning of the rehydration of drought-stressed plants, the results demonstrated that water stress did not irreversibly affect gas exchange and quantum efficiency... Tipo: Info:eu-repo/semantics/article Palavras-chave: Chlorophyll a fluorescence; Photochemical efficiency of PSII; Stress physiology; Tree species; Water deficit. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000200008 Foliar phosphorus supply and CO2 assimilation in common bean (Phaseolus vulgaris L.) under water deficit Braz. J. Plant Physiol. Santos,Mauro G. dos; Ribeiro,Rafael V.; Teixeira,Marcelo G.; Oliveira,Ricardo F. de; Pimentel,Carlos. Two common bean cultivars were grown in pots under greenhouse conditions. Plants were submitted to a foliar Pi spray two days before suspending irrigation, what enhanced net CO2 assimilation rate of Ouro Negro cultivar but did not change significantly the photosynthesis of Carioca cultivar under both water deficit and rehydration periods. The results revealed that a foliar Pi spray induced an up-regulation of photosynthesis in common bean under mild water deficit, with this effect being genotype-dependent. Tipo: Info:eu-repo/semantics/other Palavras-chave: Drought stress; Ortophosphate; Photosynthesis; Water deficit. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000300007 Identifying water stress-response mechanisms in citrus by in silico transcriptome analysis Genet. Mol. Biol. Torres,Gisele A.M.; Gimenes,Marcos A.; Rosa Jr.,Vicente E. de; Quecini,Vera. Water deficit is one of the most critical environmental stresses to which plants are submitted during their life cycle. The evolutionary and economic performance of the plant is affected directly by reducing its survival in the natural environment and its productivity in agriculture. Plants respond to water stress with biochemical and physiological modifications that may be involved in tolerance or adaptation mechanisms. A great number of genes have been identified as transcriptionally regulated for water deficit. EST sequencing projects provide a significant contribution to the discovery of expressed genes. The identification and determination of gene expression patterns is important not only to understand the molecular bases of plant responses but also... Tipo: Info:eu-repo/semantics/article Palavras-chave: Environmental stress; CitEST; Data mining; Tolerance mechanisms; Water deficit. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000500018 Maize yield and rainfall on different spatial and temporal scales in Southern Brazil PAB Bergamaschi,Homero; Wheeler,Timothy Robert; Challinor,Andrew Juan; Comiran,Flávia; Heckler,Bruna Maria Machado. This study aimed to establish relationships between maize yield and rainfall on different temporal and spatial scales, in order to provide a basis for crop monitoring and modelling. A 16-year series of maize yield and daily rainfall from 11 municipalities and micro-regions of Rio Grande do Sul State was used. Correlation and regression analyses were used to determine associations between crop yield and rainfall for the entire crop cycle, from tasseling to 30 days after, and from 5 days before tasseling to 40 days after. Close relationships between maize yield and rainfall were found, particularly during the reproductive period (45-day period comprising the flowering and grain filling). Relationships were closer on a regional scale than at smaller scales.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays; Rainfall; Water deficit; Crop models; Critical period. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007000500001 Response to water deficit of Nothofagus dombeyi plants inoculated with a specific (Descolea antárctica Sing) and non-specific (Pisolithus tinctorious (Pers.) Coker &amp; Couch) ectomycorrhizal fungi RChHN ALBERDI,MIREN; ÁLVAREZ,MARICEL; VALENZUELA,EDUARDO; GODOY,ROBERTO; OLIVARES,ERICK; BARRIENTOS,MÓNICA. The influence of the specific Descolea antárctica {Da) and the non-specific Pisolithus tinctorious {Pt) ectomycorrhizal fungi on some physiological leaf parameters of the Chilean evergreen Nothofagus dombeyi subjected to a low soil water potential (-1.6 to -1.9 MPa in a growth chamber for 35 days) and a high water potential (-0.07 to -0.09 MPa, control) was studied. Drought decreased the water status and increased carbohydrates in mycorrhizal and non-mycorrhizal plants, appearing Z)a-mycorrhizal and non mycorrhizal plants better osmotically adjusted (OA= 0.60 MPa and 0.52 MPa, respectively) than ft-mycorrhizal (0.39 MPa). Proline is not involved in the O A of mycorrhizal plants. The inoculation of N. dombeyi with both ectomycorrhizal fungi favored a better... Tipo: Journal article Palavras-chave: Nothofagus dombeyi; Ectomycorrhizal fungi; Water deficit; Osmotic adjustment; Performance of the PS II. Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2007000400009 Comparison between climatological and field water balances for a coffee crop Scientia Agricola Bruno,Isabeli Pereira; Silva,Adriana Lúcia da; Reichardt,Klaus; Dourado-Neto,Durval; Bacchi,Osny Oliveira Santos; Volpe,Clóvis Alberto. The use of climatological water balances in substitution to complete water balances directly measured in the field allows a more practical crop management, since the climatological water balances are based on data monitored as a routine. This study makes a comparison between these methods in terms of estimatives of evapotranspiration, soil water storage, soil available water, runoff losses, and drainage below root zone, during a two year period, taking as an example a coffee crop of the variety Catuaí, three to five years old. Climatological water balances based on the estimation of the evapotranspiration through the methods of Thornthwaite and Penman-Monteith, can reasonably substitute field measured balances, however underestimating the above mentioned... Tipo: Info:eu-repo/semantics/article Palavras-chave: Evapotranspiration; Soil water storage; Available water; Water deficit; Water excess. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000300001 Registros recuperados: 99 Primeira ... 1 2 3 4 5 ... Última

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