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	Provedor de dados Infoteca-e (1) Autor BORBA, E. R. (1) OLIVEIRA, N. M. de (1) PONZONI-REY, R. W. (1) SELAIVE-VILLARROEL, A.B. (1) VAZ, C. M. S. L. (1) Palavra-chave Caracteristica (1) Corriedale (1) Ovino (1) Preço. (1) Remate (1) Romney Marsh. (1) Mais... Tipo do documento Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) (1) Ano 1988 (1) País Brazil (1) Idioma Português (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 99 Primeira ... 1 2 3 4 5 ... Última Response to water deficit of Nothofagus dombeyi plants inoculated with a specific (Descolea antárctica Sing) and non-specific (Pisolithus tinctorious (Pers.) Coker & 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 Hydrogen sulfide, potassium phosphite and zinc sulfate as alleviators of drought stress in sunflower plants Ciência e Agrotecnologia Almeida,Gabriel Martins; Silva,Adinan Alves da; Batista,Priscila Ferreira; Moura,Luciana Minervina de Freitas; Vital,Roberto Gomes; Costa,Alan Carlos. ABSTRACT Drought is the most harmful environmental factor crop productivity. Some chemicals are used in agriculture to mitigate the damage from this stress on plants. Therefore, we examined whether the spraying of zinc sulfate (ZS), potassium phosphite (KPhi) and the hydrogen sulfide (H2S) donor sodium hydrosulfide (NaHS) would mitigate the deleterious effects of water deficit on sunflower plants by analyzing physiological and biometric characteristics. The experiment was carried out in a greenhouse using a randomized block design with five replications. The treatments were arranged in a 4 x 2 factorial scheme: [Factor A (Alleviators)] - spraying of KPhi (0.5 L ha-1), ZS (3.2 kg ha-1), NaHS (1.2 g ha-1), and water; [Factor B (substrate humidity, SH)] -... Tipo: Info:eu-repo/semantics/article Palavras-chave: Photosynthesis; Water deficit; Malonaldehyde; Leaf water potential; Mitigating substance. Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100225 Germination and biochemical changes in West Indian gherkin seeds under water stress at different temperatures Rev. Ciênc. Agron. Almeida,João Paulo Nobre de; Paiva,Emanoela Pereira de; Torres,Salvador Barros; Sá,Francisco Vanies da Silva; Leite,Moadir de Sousa. ABSTRACT Information on the effects of climate conditions on the survival of species grown in semi-arid regions is essential and at the same time scarce, especially regarding rustic species such as West Indian gherkin (Cucumis anguria L.). Thus, this study aimed to evaluate germination, growth and biochemical alterations in C. anguria seeds under water stress and different temperature regimes. The experimental design was completely randomized, in 5 x 5 factorial scheme, composed of five osmotic potentials (0.0; -0.1; -0.2; -0.3 and -0.4 MPa) and four temperatures (20; 25; 30 °C and alternating temperatures of 20-30 ºC), with each treatment composed of four replicates of 50 seeds. The seeds were sown on paper towel (Germitest®) and germinated in Biochemical... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cucumis anguria; Cucurbitaceae; Water deficit; Vigor. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000300411 NONLINEAR AGROMETEOROLOGICAL MODELS FOR ESTIMATING LYCHEE FRUIT GROWTH Rev. Bras. Frutic. APARECIDO,LUCAS EDUARDO DE OLIVEIRA; FERREIRA,RAFAEL BIBIANO; ROLIM,GLAUCO DE SOUZA; SOUZA,BIANCA SARZI DE; SOUZA,PAULO SERGIO DE. ABSTRACT The influence of climate on the development of lychee fruit is complex, but few studies have discussed the problem. We developed agrometeorological models for simulating the development of fruit fresh matter (FM), fruit dry matter (DM), fruit length (LE), fruit diameter (DI), fruit volume (VO), and fruit number per cluster (FN) of the “Bengal” lychee cultivar as functions of climatic conditions. We conducted three analyses: (a) the influence of mean meteorological elements on the rates of fruit growth, (b) estimation of fruit development by the agrometeorological models using sigmoidal adjustments, and (c) simulation of fruit development using multiple nonlinear regression of two meteorological elements to improve the accuracy. A rate of water... Tipo: Info:eu-repo/semantics/article Palavras-chave: Analysis of growth; Water deficit; Fruit number; Climate. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000200701 Establishment of Brachiaria brizantha cv. Marandu, under levels of soil water availability in stages of growth of the plants R. Bras. Zootec. Araujo,Leandro Coelho de; Santos,Patrícia Menezes; Mendonça,Fernando Campos; Mourão,Gerson Barreto. The objective of this work was to evaluate yield traits and development of palisadegrass under the influence of water deficit during the establishment period. The experiment was carried out in a greenhouse, in a completely random block statistical design in a factorial arrangement and additional treatment (3 × 3 + 1). The treatments referred to the suppression of irrigation at different phases of the establishment (sowing, germination and initial tillerring) until the soil presented water content of 75%, 50%, and 25% of the moisture related to field capacity (qFC), besides control treatment with no water restriction. Evaluations of number of grown tillers per vase, green leaves per tiller and plant height were carried out weekly, for five weeks after the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Biomass; Drought; Palisadegrass; Tillering; Water deficit. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000700002 Key factors that influence for seasonal production of Guinea grass Scientia Agricola Araujo,Leandro Coelho de; Santos,Patricia Menezes; Rodriguez,Daniel; Pezzopane,José Ricardo Macedo. ABSTRACT: Climate, soil and management are the main drives for growth and production of tropical pastures. Thus, a better understanding of the effects of these factors and their interactions under climate conditions is required to obtain effective management options. Here, we used data from two field trials to research on climate and management interactions on the production seasonality of Panicum maximum Jacq. Treatments included four sampling times (250, 500, 750, and 1000 °C accumulated) during eight regrowth period, under irrigated and rainfed conditions and, cuts were made to simulate grazing intensity. All treatments were arranged in a completely randomized block design with four replications. At each sampling time, basal tillers were sampled to... Tipo: Info:eu-repo/semantics/article Palavras-chave: Daylength; Degree-days; Mombaça; Tropical forage; Water deficit. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000300191 Water relations and some aspects of leaf metabolism of Jatropha curcas young plants under two water deficit levels and recovery Braz. J. Plant Physiol. Arcoverde,Gabriela B.; Rodrigues,Bruno M.; Pompelli,Marcelo F.; Santos,Mauro G.. Stomatal conductance (g s), transpiration (E), relative water content (RWC), superoxide dismutase activity (SOD), malondialdehyde (MDA), leaf carbohydrate soluble (LCS), free amino acids (FAA) and total protein (TP) content were measured under mild and severe drought stress in young potted Jatropha curcas L. in the greenhouse. The plants were kept for 12 days under three different water regimes, control (well hydrated), 50% irrigation control (mild stress) and 25% (severe stress), after rehydration were measured on the second and fourth day. Both mild and severe stress decreased g s and E; however, only severe stress reduced LCS, FAA and TP content and increased SOD activity (70%) and MDA content (60%) compared with the control. Moreover, under these... Tipo: Info:eu-repo/semantics/article Palavras-chave: Biodiesel; Drought tolerance; MDA; Oxidative stress; ROS; Water deficit. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202011000200004 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 Improved tolerance of wheat plants (Triticum aestivum L.) to drought stress and rewatering by the arbuscular mycorrhizal fungus Glomus claroideum: effect on growth and cell membrane stability Braz. J. Plant Physiol. Beltrano,José; Ronco,Marta G.. The aim of this paper was to investigate the contribution of the arbuscular mycorrhizal fungus Glomus claroideum to drought stress tolerance in wheat plants grown under controlled conditions in a growth chamber, and subjected to moderate or severe water stress and rewatering. Water stress tolerance was determined through total dry weight, leaf relative water content, leakage of solutes and leaf chlorophyll and protein concentrations in mycorrhizal and non-mycorrhizal wheat plants. Total dry weight and leaf chlorophyll concentrations were significantly higher in mycorrhizal plants after moderate or severe water stress treatments compared with non-mycorrhizal ones. Electrolyte leakage was significantly lower in water-stressed inoculated plants. Compared to... Tipo: Info:eu-repo/semantics/article Palavras-chave: Mycorrhizae; Relative water content; Rewatering; Solute leakage; Water deficit. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202008000100004 Agronomic performance of maize hybrids under supplemental irrigation depths AGRIAMBI Ben,Luis H. B.; Peiter,Marcia X.; Robaina,Adroaldo D.; Kirchner,Jardel H.; Mezzomo,Wellington; Pimenta,Bruna D.. ABSTRACT The choice of a maize hybrid, considering the technology level and irrigation management, contributes to the improvement of the plant productivity and water use efficiency (WUE). Thus, the objective of this study was to evaluate the effects of irrigation depths on production components, grain yield, technical efficiency, and WUE in maize hybrids. The experiment was conducted in Santiago, RS state, Brazil, in the 2015/2016 and 2016/2017 crop seasons, using a randomized block design in factorial scheme, consisting of five irrigation depths (0, 50, 75, 100 and 125% of crop evapotranspiration - ETc) and four maize hybrids in crop season I (2015/2016), and six maize hybrids in crop season II (2016/2017). The number of ears per plant, number of grains... Tipo: Info:eu-repo/semantics/article Palavras-chave: Water deficit; Zea mays L.; Water use efficiency; Genotypes; Grain yield. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000700524 Intercepted solar radiation by maize crops subjected to different tillage systems and water availability levels PAB Bergamaschi,Homero; Dalmago,Genei Antonio; Bergonci,João Ito; Krüger,Cleusa Adriane Menegassi Bianchi; Heckler,Bruna Maria Machado; Comiran,Flavia. The objective of this work was to evaluate changes in the photosynthetic photon flux density (PPFD) interception efficiency and PPFD extinction coefficient for maize crop subjected to different soil tillage systems and water availability levels. Crops were subjected to no-tillage and conventional tillage systems combined with full irrigation and non-irrigation treatments. Continuous measurements of transmitted PPFD on the soil surface and incoming PPFD over the canopy were taken throughout the crop cycle. Leaf area index and soil water potential were also measured during the whole period. Considering a mean value over the maize cycle, intercepted PPFD was higher in the conventional tillage than in the no-tillage system. During the initial stages of plants,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays; Leaf area; No-tillage; Photosynthetic photon flux density; Water deficit. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010001200001 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 Water deficit modifies the carbon isotopic composition of lipids, soluble sugars and leaves of Copaifera langsdorffii Desf. (Fabaceae) Acta Botanica Bertholdi,Angelo Albano da Silva; Costa,Vladimir Eliodoro; Rodrigues,Angélica Lino; Almeida,Luiz Fernando Rolim de. ABSTRACT Water deficit is most frequent in forest physiognomies subjected to climate change. As a consequence, several tree species alter tissue water potential, gas exchange and production of carbon compounds to overcome damage caused by water deficiency. The working hypothesis, that a reduction in gas exchange by plants experiencing water deficit will affect the composition of carbon compounds in soluble sugars, lipids and vegetative structures, was tested on Copaifera langsdorffii. Stomatal conductance, leaf water potential, and CO2 assimilation rate declined after a period of water deficit. After rehydration, leaf water potential and leaf gas exchange did not recover completely. Water deficit resulted in 13C enrichment in leaves, soluble sugars and... Tipo: Info:eu-repo/semantics/article Palavras-chave: Carbon assimilation; Carbon isotopic composition; Lipids; Soluble sugars; Water deficit. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000100080 Physiology of cashew plants grown under adverse conditions Braz. J. Plant Physiol. Bezerra,Marlos A.; Lacerda,Claudivan F. de; Gomes Filho,Enéas; Abreu,Carlos E. B. de; Prisco,José T.. The cashew (Anacardium occidentale L.) is an important crop for semi-arid agriculture and contributes to the social and economical development of several world regions, including the northeast of Brazil. In spite of its importance, very few studies aim to understand the effects of abiotic stresses on the development and yield of the cashew. This review covers the research on cashew ecophysiology, with emphasis on the effects of water and salt stress on its development, mineral nutrition and gas exchange processes. The results presented here were obtained at different plant growth stages and under different environmental conditions of soil and climate. The ecophysiological significance of this information is also discussed. Tipo: Info:eu-repo/semantics/article Palavras-chave: Anacardium occidentale; Development; Salt stress; Water deficit. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202007000400012 Effect of different levels of water deficit on rapeseed (Brassica napus L.) crop Ciência e Agrotecnologia Bilibio,Carolina; Carvalho,Jacinto de Assunção; Hensel,Oliver; Richter,Uwe. Effects of different levels of water deficit applied during rapeseed crop development were assessed in a trial with metallic pots in greenhouse at the Department of Agricultural Engineering of Kassel University, Witzenhausen, Germany. A randomized block design was used with one cultivar (Ability Summer Rape) and three levels of water deficit (0, 30, and 60% of evapotranspiration) in three treatments and 20 replicates. Irrigation management was carried out through daily water balance, where ET = I - D; ET: evapotranspiration; I: irrigation; and D: drainage. The following evaluations were carried out weekly: stem diameter (mm); plant height (cm); number of leaves; number of branches and number of pods. At the end of the experiment, assessed total green... Tipo: Info:eu-repo/semantics/article Palavras-chave: Water management; Irrigation; Water deficit. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000400005 Mapping QTLs for drought tolerance in a SEA 5 x AND 277 common bean cross with SSRs and SNP markers Genet. Mol. Biol. Briñez,Boris; Perseguini,Juliana Morini Küpper Cardoso; Rosa,Juliana Santa; Bassi,Denis; Gonçalves,João Guilherme Ribeiro; Almeida,Caléo; Paulino,Jean Fausto de Carvalho; Blair,Matthew Ward; Chioratto,Alisson Fernando; Carbonell,Sérgio Augusto Morais; Valdisser,Paula Arielle Mendes Ribeiro; Vianello,Rosana Pereira; Benchimol-Reis,Luciana Lasry. Abstract The common bean is characterized by high sensitivity to drought and low productivity. Breeding for drought resistance in this species involves genes of different genetic groups. In this work, we used a SEA 5 x AND 277 cross to map quantitative trait loci associated with drought tolerance in order to assess the factors that determine the magnitude of drought response in common beans. A total of 438 polymorphic markers were used to genotype the F8 mapping population. Phenotyping was done in two greenhouses, one used to simulate drought and the other to simulate irrigated conditions. Fourteen traits associated with drought tolerance were measured to identify the quantitative trait loci (QTLs). The map was constructed with 331 markers that covered all... Tipo: Info:eu-repo/semantics/article Palavras-chave: Abiotic stress; Interpopulation gene-pool; Molecular markers; QTL mapping; Water deficit. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000500813 Physiological traits for drought phenotyping in cotton - doi: 10.4025/actasciagron.v33i1.9839 Agronomy Brito, Giovani Greigh de; Embrapa Algodão; Sofiatti, Valdinei; Embrapa Algodão; Lima, Marleide Magalhães de Andrade; Embrapa Algodão; Carvalho, Luiz Paulo de; Embrapa Algodão; Silva Filho, João Luiz da; Embrapa Algodão. The objective of this study was to identify physiological traits that could distinguish between cotton genotypes that were tolerant or sensitive to water deficits. The experiment was conducted in a completely randomized design through a factorial combination to analyze four genotypes (BRS 187 8H and ACALA SJ-4 - water deficit tolerant; CNPA 7H and SU-0450/8909 - water deficit sensitive) and two water regimes (watered/always irrigated and stressed/with a water deficit imposed at flowering). Irrigation was suspended for the plants in the water deficit treatment groups when their first flowers appeared. Leaf water potential (ψpd) was monitored until the plants reached -3.0 MPa predawn, at which point leaf samples were collected for analysis. The plants were... Palavras-chave: 5.01.03.06-7 abiotic stress; Gossypium; Water deficit Fisiologia de plantas cultivadas abiotic stress; Gossypium; Water deficit. Ano: 2011 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/9839 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 Effects of water deficit on gas exchange of different age leaves and both stem and leaves solute content of sunflowers Agrociencia Canavar,Öner. Water deficit alters biochemical and physiological processes ranging from photosynthesis to protein synthesis and solute accumulation in the different organs of the plant. The objectives of this study were to determine the effect of water deficit on photosynthetic responses of leaves at different ages and the accumulation of soluble sugar and starch in the stems and leaves of sunflowers (Helianthus annuus L.). Two sunflower cultivars (Sanbro and TR-3080) were used under two water regimes, well watered (70 % irrigation) and water deficit (20 % irrigation) according to the field capacity of soil under greenhouse conditions. The experimental design was randomized complete block with five replicates. The transpiration rate (E), the ratio of intercellular air... Tipo: Info:eu-repo/semantics/article Palavras-chave: Helianthus annuus L.; Photosynthesis; Stomatal limitation; Water deficit. Ano: 2015 URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952015000600005 Climatic effects on sugarcane ripening under the influence of cultivars and crop age Scientia Agricola Cardozo,Nilceu Piffer; Sentelhas,Paulo Cesar. The lack of information about the effects of cultivars, crop age and climate on the sugarcane (Saccharum ssp.) crop yield and quality has been the primary factor impacting the sugar-ethanol sector in Brazil. One of the processes about which we do not have a satisfactory understanding is sugarcane ripening and the effects of cultivars, crop age and climate on that. Sugarcane ripening is the process of sucrose accumulation in stalks, which is heavily influenced by several factors, mainly by climatic conditions such as air temperature and water deficits. Because it is a complex process, studies of the variables involved in sugarcane ripening can provide important information, resulting in a better use of commercial cultivars, bringing advantages to growers,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Saccharum spp; Air temperature; Precipitation; Water deficit; Sucrose. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000600011 Registros recuperados: 99 Primeira ... 1 2 3 4 5 ... Última

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