SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

RIBEIRO, R. C.; MATIAS, J. R.; PELACANI, C. R.; DANTAS, B. F..

The aim of this study was to evaluate the effect of different abiotic stresses on the activity of antioxidant enzymes and on accumulation of proline in Erythrina velutina Willd. seeds during germination. Mulungu seeds were scarified and placed to germinate at constant temperatures of 15, 25, and 35 °C, moistened with distilled water, and exposed to 12 h of light. Other seeds were exposed to solutions of NaCl (EC of 0, 4, and 8 dS.m-1) and polyethylene glycol (osmotic potentials of 0.0, -0.2, and - 0.6 MPa) and maintained in a germination chamber set at 25 °C and 12 h photoperiod for seven days. At the end of each period of imbibition, the embryonic axis and cotyledons of the seedlings were collected separately and used to quantify proline content and the...

Adaptabilidade e estabilidade de linhagens de sorgo em ambientes com e sem restrição hídrica.

Palavras-chave: Erythrina velutina; Estresse abiótico; Germinação; Caatinga; Mulungu; Semente; Antioxidative metabolism; Water stress.

Ano: 2014

URL: http://www.alice.cnptia.embrapa.br/handle/doc/991571

MENEZES, C. B. de; RIBEIRO, A. da S.; TARDIN, F. D.; CARVALHO, A. J. de; BASTOS, E. A.; CARDOSO, M. J.; PORTUGAL, A. F.; SILVA, K. J. da; SANTOS, C. V. dos; ALMEIDA, F. H. L. de..

O objetivo do presente trabalho foi selecionar linhagens de sorgo mais tolerantes à seca e responsivas à melhoria do ambiente. Os tratamentos foram arranjados em um esquema fatorial, composto por 25 linhagens e dois regimes hídricos. Os experimentos foram realizados em três anos consecutivos (2006, 2007 e 2008), totalizando seis experimentos. O delineamento utilizado foi o de blocos casualizados, com três repetições. Para seleção dos genótipos foram estimados parâmetros de adaptabilidade e estabilidade para produtividade de grãos utilizando os métodos univariados de Lin & Bins e Annicchiarico, e análise multivariada AMMI. A seleção para adaptabilidade geral pelos dois primeiros métodos é bastante similar, diferindo, no entanto do terceiro método. A...

Adaptabilidade e estabilidade de linhagens de sorgo em ambientes com e sem restrição hídrica.

Palavras-chave: Estresse hídrico; Estresse abiótico; Tolerância à seca; Melhoramento vegetal; Sorghum bicolor; Water stress; Abiotic stress; Drought tolerance; Plant breeding.

Ano: 2015

URL: http://www.alice.cnptia.embrapa.br/handle/doc/1030084

MENEZES, C. B. de; RIBEIRO, A. da S.; TARDIN, F. D.; CARVALHO, A. J. de; BASTOS, E. A.; CARDOSO, M. J.; PORTUGAL, A. F.; SILVA, K. J. da; SANTOS, C. V. dos; ALMEIDA, F. H. L. de.

Agricultural water management in a water stressed catchment: lessons from the RIPARWIN project

Palavras-chave: Estresse hídrico; Estresse abiótico; Tolerância à seca; Sorghum bicolor; Resistência à seca; Melhoramento vegetal; Water stress; Abiotic stress; Drought tolerance; Plant breeding.

Ano: 2015

URL: http://www.alice.cnptia.embrapa.br/handle/doc/1025090

AgEcon

McCartney, Matthew P.; Lankford, Bruce A.; Mahoo, Henry F..

With contributions from Julien Cour, Reuben Kadigi, Japhet Kashaigili, Magayane Machibya, Abraham Mehari, Sylvie Morardet, Kossa Rajabu, Charles Sokile, Siza Tumbo, Barbara van Koppen, Thalia Vounaki and Daniel Yawson

Tipo: Report

Palavras-chave: River basin management; Water stress; Irrigation programs; Irrigation management; Irrigation efficiency; Water use; Water allocation; Wetlands; Water rights; Water law; Economic aspects; Water rates; User charges; Water users associations; Decision support tools; Crop Production/Industries; Environmental Economics and Policy; Farm Management; Land Economics/Use; Productivity Analysis; Resource /Energy Economics and Policy.

Ano: 2007

URL: http://purl.umn.edu/37668

Alteração no potencial osmótico e teor de carboidratos solúveis em plantas jovens de lobeira (Solanum lycocarpum St.-Hil.) em resposta ao estresse hídrico

Rev. Bras. Bot.

CHAVES FILHO,JALES TEIXEIRA; STACCIARINI-SERAPHIN,ELIANE.

Solanum lycocarpum é uma espécie típica da vegetação do cerrado brasileiro e tem demonstrado resistência à seca que ocorre em seu ambiente. O ajustamento osmótico é um decréscimo do potencial osmótico causado pelo acúmulo de solutos nas células, o qual mantém o gradiente de potencial hídrico e, ao mesmo tempo, a turgescência necessária ao crescimento celular. A influência do estresse hídrico no potencial osmótico e no teor de carboidratos solúveis foi investigada neste trabalho. A análise dos resultados mostrou que as plantas de Solanum lycocarpum apresentaram redução significativa nos valores de potencial osmótico em resposta ao estresse hídrico. O aumento no teor de carboidratos solúveis foi verificado em plantas sob condições estressantes em casa de...

Análise comparativa entre parâmetros morfofisiológicos de soja GM e convencional sob déficit hídrico.

Palavras-chave: Osmotic adjustment; Water stress; "cerrado" vegetation; Savannah; Carbohydrate.

Ano: 2001

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000200010

Anatomic and physiological modifications in seedlings of Coffea arabica cultivar Siriema under drought conditions

MOLINARI, M. D. C.; BARBOSA, D. A.; FUGANTI-PAGLIARINI, R.; MARIN, S. R. R.; QUEIROZ, A. A.; CARNEIRO, E. A.; MERTZ-HENNING, L. M.; FARIAS, J. R. B.; NEUMAIER, N.; NEPOMUCENO, A. L..

bitstream/item/167933/1/183.pdf

Tipo: Artigo em anais de congresso (ALICE)

Palavras-chave: Soja; Parâmetro genético; Seca; Soybeans; Application parameters; Water stress.

Ano: 2017

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1081215

Ciência e Agrotecnologia

Melo,Emanuelle Ferreira; Fernandes-Brum,Christiane Noronha; Pereira,Fabrício José; Castro,Evaristo Mauro de; Chalfun-Júnior,Antonio.

Due to the weather changes prognostic for the coming years, the understanding of water deficit and physiological responses of plants to drought becomes an important requirement in order to develop technologies such as mechanisms to assist plants to cope with longer drought periods, which will be essential to maintenance of Brazilian and worldwide production. This study aimed to evaluate ecophysiological and anatomical aspects as well as the nitrate reductase activity in Siriema coffee seedlings subjected to four treatments: Daily irrigated, non-irrigated, re-irrigated 24 hours and re-irrigated 48 hours after different stress periods. Non-irrigation promoted a reduction in leaf water potential being accented from the ninth day of evaluation onwards....

Anatomical and morphological modifications in response to flooding by six Cerrado tree species

Palavras-chave: Coffee tree; Ecophysiology; Water stress; Nitrate reductase.

Ano: 2014

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000100003

Acta Botanica

Oliveira,Adilson Serafim de; Ferreira,Cristiane Silva; Graciano-Ribeiro,Dalva; Franco,Augusto César.

Wetlands are common in the Cerrado (Brazilian savannas) biome, however flooding of these wetlands impairs growth and development of most plants. We evaluated flood tolerance of typical Cerrado trees. Seedlings of Aspidosperma macrocarpon (Apocynaceae), Tabebuia rosea (Bignoniaceae), Handroanthus chrysotrichus (Bignoniaceae), Myracrodruon urundeuva (Anacardiaceae), Kielmeyera coriacea (Calophyllaceae) and Copaifera langsdorffii (Fabaceae) were flooded up to the stem base for 30 days. Stems with cortical cracks, secondary aerenchyma and hypertrophic lenticels were observed in flooded plants of M. urundeuva,H. chrysotrichus and T. rosea while adventitious roots were formed in flooded plants of T. rosea and H. chrysotrichus. However, only T. rosea developed...

Aplicación de tecnologías de percepción remota en la estimación de rendimientos en caña de azúcar.

Palavras-chave: Aerenchyma; Biomass partitioning; Flood tolerance; Hypoxia; Water stress.

Ano: 2015

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000400478

Colegio de Postgraduados

Zenteno Cruz, Guillermo Alberto.

Los productores de caña de azúcar buscan constantemente formas de reducir costos, aumentar la productividad y los rendimientos, pero en general, son pocas las herramientas que se están aplicando para tal fin. Por otra parte, es cada vez más importante la predicción temprana del rendimiento de los cultivos que permita una planificación de políticas agrícolas y de seguridad alimentaria en una economía de mercado globalizado. Con el propósito de calibrar una metodología para enfrentar estos problemas, la presente investigación se llevó a cabo en la zona de abasto del Ingenio Emiliano Zapata, en Morelos, México, en una superficie de 10, 664 hectáreas, durante el ciclo agrícola 2009-2010. El propósito del estudio fue determinar una función matemática para...

Palavras-chave: Predicción temprana; Indices de vegetación; Estrés hídrico; Evapotranspiración; Saccharum officinarum; Early prediction; Vegetation indices; Water stress; Evapotranspiración; Maestría; Hidrociencias.

Ano: 2012

URL: http://hdl.handle.net/10521/737

Application of the Hybrid-Maize model for limits to maize productivity analysis in a semiarid environment

Scientia Agricola

Liu,Yi; Yang,Shenjiao; Li,Shiqing; Chen,Fang.

Effects of meteorological variables on crop production can be evaluated using various models. We have evaluated the ability of the Hybrid-Maize model to simulate growth, development and grain yield of maize (Zea mays L.) cultivated on the Loess Plateau, China, and applied it to assess effects of meteorological variations on the performance of maize under rain-fed and irrigated conditions. The model was calibrated and evaluated with data obtained from field experiments performed in 2007 and 2008, then applied to yield determinants using daily weather data for 2005-2009, in simulations under both rain-fed and irrigated conditions. The model accurately simulated Leaf Area Index , biomass, and soil water data from the field experiments in both years, with...

ASSESSMENT OF CORN WATER UPTAKE BASED ON SAP HEAT TRACING UNDER WATER-STRESSED CONDITIONS

Palavras-chave: Crop simulation; Maize model; Potential productivity; Water stress; Spring maize.

Ano: 2012

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162012000500003

AGRIAMBI

Santos,Antonio Odair; Bergamaschi,Homero; Rosa,Luís M. G.; Bergonci,João I.; Radin,Bernadete.

ABSTRACT Crop water monitoring is an important aspect for precise control of irrigation. A reliable and movable technique is needed to properly assess water uptake of crops in the field. Water uptake by field grown maize ( Zea mays L.), in water-limited conditions was verified with the heat pulse system. The temperature difference between two radially inserted thermocouples, one 9 mm above and the other 4 mm below a heater piercing the maize stem, was measured every 0.3 sec following emission of a heat pulse in conditions of varied atmospheric demand. Comparisons of heat pulse system outputs and a high precision transpiration model estimates were done on hourly and daily basis, when low sap velocities were expected to occur. Hourly and daily basis of the...

Assessment of drought tolerance of peanut cultivars based on physiological and yield traits in a semiarid environment.

Palavras-chave: Sap flow; Transpiration; Water stress; Heat pulse.

Ano: 1999

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43661999000200145

PEREIRA, J. W. de L.; ALBUQUERQUE, M. B.; MELO FILHO, P. A.; NOGUEIRA, R. J. M. C.; LIMA, L. M. de; SANTOS, R. C. dos.

tThe regular water supply during life cycle is essential to determine the yield in the legumes. In semiaridenvironments, the irregular rainfall and high temperature influence the phenology of crops impairing theyield. Peanut is an oleaginous crop with broad adaptation to tropical and semiarid climates, but yield isoften harmed when plants face water irregularities during reproductive phase. The recommendation ofcultivars tolerant to environments with water?limitation is indispensable to farmers in order to ensurereasonable production when drought settles down. Here, we evaluating peanut bred lines in order toassess drought tolerance based on physiological and yield traits, in greenhouse and field assays. In green-house experiment, 2 genotypes (BR 1,...

Autonomy and network modulation of photosynthesis and water relations of Coffea arabica in the field

Palavras-chave: Genótipo; Amendoim; Water stress; Legumes; Phenology; Semiarid zones.

Ano: 2016

URL: http://www.alice.cnptia.embrapa.br/handle/doc/1064841

Braz. J. Plant Physiol.

Camargo-Bortolin,Lívia H.G. de; Prado,Carlos H.B. A.; Souza,Gustavo M.; Novaes,Paula.

The degree of connection between leaf gas exchange and leaf water potential, and the autonomy of these variables in relation to meteorological conditions were determined in three cultivars of Coffea arabica during clear and cloudy days. High values of vapor pressure deficit, air temperature and photosynthetic photon flux density resulted in low leaf autonomy during a clear day, irrespective the degree of connection among leaf physiological variables. Tight synchronization between physiological and meteorological variables was considered one important cause of net photosynthesis (P N) decreasing during a clear day. In contrast, diurnal P N was around three times higher on a cloudy day, when all cultivars presented high autonomy. Principal component analyses...

Avaliacao da qualidade fisiologica de sementes de soja, apos o processo de hidratacao-desidratacao e envelhecimento acelerado.

Palavras-chave: Coffea canephora; Connectance degree; Daily net photosynthesis; System analysis; Water stress.

Ano: 2008

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202008000200006

BRACCINI, A. de L. E; REIS, M. S.; SEDIYAMA, C. S.; SCAPIM, C. A.; BRACCINI, M. do C. L..

Foi conduzido um experimento com o objetivo de avaliar a qualidade fisiologica de sementes de soja (Glycine max (L.) Merrill), envolvendo as variedades UFV-10, IAC-8 e Doko RC, submetidas ao processo de hidratacao-desidratacao, seguido por uma condicao de estresse induzida pelo teste de envelhecimento acelerado. As sementes foram pre-condicionadas em PEG 6000, com potencial osmotico de -0,8 MPa, a uma temperatura de 20 Graus C., por quatro dias. Em seguida, as sementes foram novamente desidratadas, ate atingir o conteudo de umidade inicial, sendo entao submetidas ao teste de envelhecimento acelerado pelos seguintes periodos: 0, 24, 48 e 72 horas. As sementes pre-condicionadas foram comparadas com duas testemunhas: sementes nao-tratadas e sementes embebidas...

Avaliação de cultivares de soja quanto à tolerância ao estresse hídrico em substrato contendo polietileno glicol - DOI: 10.4025/actasciagron.v30i2.1731

Palavras-chave: Glycine max; Germinacao; Vigor; Estresse hidrico; Condicionamento osmotico; Germination; Water stress; Osmoconditioning.

Ano: 1999

URL: http://www.alice.cnptia.embrapa.br/handle/doc/86411

Agronomy

Texeira, Leandra Regina; UEM; Braccini, Alessandro de Lucca e; UEM; Sperandio, Decio; UEM; Scapim, Carlos Alberto; UEM; Schuster, Ivan; Cooperativa Central de Pesquisa Agricola; Viganó, Joselaine; UEM.

O trabalho teve por objetivo avaliar genótipos de soja quanto à tolerância ao estresse hídrico, em substrato embebido com polietileno glicol (PEG 6000). Foram utilizadas sementes armazenadas por um ano, em condições não-controladas de laboratório das cultivares: CD 201, CD 202, CD 204, CD 205, CD 206, CD 208, CD 215, CD 216, Embrapa 48, BRS 132, BRS 184 e BRS 212. As avaliações consistiram em submeter às sementes aos testes de germinação, classificação do vigor das plântulas, comprimento e biomassa seca das plântulas, em condição de estresse hídrico, utilizando dois níveis de potencial osmótico (zero e -0,1 MPa). As cultivares foram agrupadas em diferentes classes de tolerância à seca, em razão da redução percentual nas características avaliadas {% Redução...

Palavras-chave: 5.01.03.05-9 Melhoramento Vegetal Glycine max (L.) Merrill; Sementes; Potencial osmótico; Germinação; Estresse hídrico 5.01.03.05-9 Melhoramento Vegetal Glycine max (L.) Merrill; Seeds; Osmotic potential; Germination; Water stress.

Ano: 2008

URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1731

Avaliação de plantas transgênicas de soja superexpressando o gene AtNCED3 sob estresses hídricos.

Barley grown under limiting water conditions.

SILVA, M. H. P.; CRUZ, G. E. N.; FUHRMANN, M. B.; ANDREATTA, E. C.; MOLINARI, M. D. C.; MARIN, S. R. R.; NEPOMUCENO, A. L.; MERTZ-HENNING, L. M..

bitstream/item/204728/1/p-87.pdf

Tipo: Capítulo em livro científico (ALICE)

Palavras-chave: Soja; Planta Transgênica; Resistência a Seca; Soybeans; Transgenic plants; Water stress.

Ano: 2019

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1114377

CASTRO NETO, M. T. de..

Tres cultivares de cevada (Hordeum vulgare L.) foram cultivadas com uma irrigacao de pre-plantio e precipitacao adicional na Universidade do Arizona, com o objetivo de estudar a relacao existente entre o crescimento, fisiologia e produtividade. A produtividade da cultivar Bold foi semelhante a da cultivar 4-21-13, e esta obteve produtividade superior a da cultivar 309-1. A cultivar que obteve a maior taxa de crescimento da espiga no final do periodo reprodutivo obteve alta produtividade. As cultivares mais produtivas nao apresentaram ponto de maturacao precoce.

Behavior and water needs of sesame under different irrigation regimes: Analysis of growth.

Palavras-chave: Estresse hidrico; Estudo fisiologico; Hordeum vulgare; Water stress; Physiological studies.

Ano: 1997

URL: http://www.alice.cnptia.embrapa.br/handle/doc/86634

PEREIRA, J. R.; GUERRA, H. O. C.; BEZERRA, J. R. C.; ZONTA, J. H.; ARAÚJO, W. P.; ALMEIDA, E. S. A. B. de.

The aim of this work was to evaluate the growth of sesame BRS 196 CNPA G4 in different irrigation depths (305, 436, 567 and 698 mm), applied on the basis of crop evapotranspiration? ETc (the depth of 567 mm was equal to 100% ETc). It was conducted at Embrapa Cotton, in Barbalha County, Ceará State, Brazil, 2012. The experiment was in randomized blocks, with treatments distributed in plots with three replications. The ETc was calculated by multiplying the reference evapotranspiration (ETo), determined by the Penman-Monteith method, by the crop coefficients (Kc), recommended for each phenological stage of the crop and by FAO. For the other irrigation treatments, the ETc was multiplied by 0.4, 0.7 and 1.3 (40, 70 and 130% of ETc). Primarily, height, stem...

Behavior and water needs of sesame under different irrigation regimes: III. Production and hydric efficiency.

Palavras-chave: Água; Sesamum indicum; Gergelim; Irrigação; Evapotranspiração; Taxa de crescimento; Water stress; Evapotranspiration; Irrigation.

Ano: 2017

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1083011

PEREIRA, J. R.; GUERRA, H. O. C.; ZONTA, J. H.; BEZERRA, J. R. C.; ALMEIDA, E. S. A. B. de; ARAÚJO, W. P..

This study aimed to identify the irrigation depth (305, 436, 567 and 698 mm), applied on the basis of crop evapotranspiration- ETc (the depth of 567 mm was equal to 100% of ETc) for best yield (Y) and water use efficiency (WUE) for irrigation and soil water stress tolerance (Ky) of sesame BRS 196 CNPA G4. The experiment was conducted at Embrapa Cotton, Barbalha County, CE State, Brazil, in 2012. The experimental design was randomized block, with three replications. ETc was calculated by multiplying the reference evapotranspiration (ETo) determined by Penman-Monteith method with the crop coefficients (Kc) recommended by FAO. For other irrigation treatments, ETc was multiplied by 0.4, 0.7 and 1.3 (40, 70 and 130% of ETc). During harvest, number of capsules...

Biomass production and grain yield of three sorghum lines difering in drought resistance

Palavras-chave: Evapotranspiração; Sesamum indicum; Gergelim; Irrigação; Water stress; Evapotranspiration; Irrigation; Oil content.

Ano: 2017

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1083020

Phyton

Castro-Nava,S; Ortiz-Cereceres,J; Mendoza-Castillo,M del C; Huerta,AJ.

The aim of this study was to determine the eficiency of drought classification criteria that we previously reported for our grain sorghum genotypes. Two tolerant genotypes of grain sorghum [Sorghum bicolor (L.) Moench] (UAT-124 and UAT-152) and one susceptible (UAT-30) were subjected to drought under greenhouse conditions at either panicle initiation, flag leaf, or flowering. Results showed that the effects of drought depended on when drought stress occurred during development. Biomass of the three sorghum genotypes was significantly reduced at the flag leaf stage (48%) by drought stress, but the greatest reduction occurred in the susceptible genotype UAT-30 (71%). Results showed that biomass accumulation for UAT-124 and UAT-30 was...