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| Registros recuperados: 147 | |
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| Sassi, Maria. |
| The paper simulates the possible sorghum price change and the related probability of occurrence under different rainfall scenarios and in a context of price uncertainty on international markets. The empirical investigation is based on the stochastic approach. Results underline an expected increase in sorghum price under the effect of the high level of uncertainty in precipitation and in international market price; the most intense likely change produced by the international market price of sorghum uncertainty; the need to overcome the agricultural view in policy making in order to include a market perspective. |
| Tipo: Presentation |
Palavras-chave: Climate change; Drought; Food prices; Stochastic approach; Sudan; Environmental Economics and Policy; Q18; Q54. |
| Ano: 2012 |
URL: http://purl.umn.edu/124111 |
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| Esper Neto,Michel; Minato,Evandro Antonio; Besen,Marcos Renan; Inoue,Tadeu Takeyoshi; Batista,Marcelo Augusto. |
| ABSTRACT Brazilian soybean producers commonly apply maintenance potassium (K) fertilization during cultivation to restore the K taken up by plants; however, this measure can modify the morphophysiological plant characteristics, since the functions of K are closely related with plant growth and development. This study assessed the morphological changes in soybean plants in response to K rates, sowing fertilization, and the application periods of K fertilization in a Latossolo Vermelho eutroférrico (Oxisol) under a no-tillage system, located in the municipality of Floresta, Paraná. A randomized block design was used in the experiment with four replications in a fully crossed factorial design (5 × 2 × 2). The experiment was carried out in two growing seasons... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leaf area index; Correlation; Yield; Drought. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100525 |
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| Gava,Ricardo; Lima,Sebastião F. de; Santos,Osvaldir F. dos; Anselmo,Jefferson L.; Cotrim,Mayara F.; Kühn,Irineu E.. |
| ABSTRACT Reductions in soybean yields are mainly linked to the occurrence of dry spells, which are becoming more frequent due to climate change. Thus, the aim of this study was to evaluate soybean cultivars irrigated with different water depths under center pivot. The experiment was conducted during the 2014/15 growing season, under center-pivot irrigation in Chapadão do Sul, MS, Brazil. The design was a randomized block in split plot with four replicates, where plots consisted of 4 water depths (0, 50, 75 and 100% of crop evapotranspiration - ETc) and the subplots of 6 soybean cultivars (NA 5909 RR, DM 5958 IPRO, Anta 82 RR, M 7110 IPRO, Desafio RR, M 7739 IPRO). The cultivar Desafio RR was the one that best responded to irrigation, increasing yield to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max (L.) Merrill.; Drought; Water deficit. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000100010 |
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| Silva,Adriana C. da; Suassuna,Janivan F.; Melo,Alberto S. de; Costa,Rayssa R.; Andrade,Wellerson L. de; Silva,Duval C. da. |
| ABSTRACT Sesame is an important crop in Northeast Brazil, where climate conditions require adapted genotypes and alternatives for plant defense against drought. This study aimed to evaluate the salicylic acid as drought attenuator in sesame genotypes. The experiment evaluated six genotypes (BRS Seda, CNPA-G2, CNPA-G3, CNPA-G4, LAG-Branquinha and LAG-Pretinha), five osmotic potentials (0, -0.2, -0.4, -0.6 and -0.8 MPa) and three seed treatments (soaking in distilled water, in salicylic acid and no treatment). CNPA-G4 is tolerant to drought in the germination stage. Salicylic acid at 10-5 M induced tolerance to drought stress in sesame, but it is necessary to test other concentrations. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sesamum indicum L.; Drought; Tolerance promotion. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000300156 |
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| Macêdo,Érika C. F. de; Zonta,João H.; Melo,Yuri L.; Melo,Alberto S. de; Silva,Duval C. da; Andrade,Wellerson L. de. |
| ABSTRACT The aim of this study was to evaluate the changes in osmoregulatory metabolism of cotton genotypes subjected to water deficit and recovery period. In a greenhouse, six cotton genotypes and two water managements were combined in a 6 x 2 factorial scheme, in a completely randomized design, evaluated after 14 and 22 days under water stress and recovery conditions, respectively. The water status, growth indicators and compatible solutes in the leaves were evaluated. The genotypes BRS Seridó, BRS Aroeira and BRS 7MH withstand better the stress condition because they had lower variations in their water potentials due to the osmotic adjustment and maintained their growth under water deficit conditions. The BRS 286 is the most sensitive genotype to the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gossypium hirsutum L.; Osmotic adjustment; Compatible osmolytes; Drought. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000800607 |
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| SILVA,ALEXANDRE REUBER ALMEIDA DA; BEZERRA,FRANCISCO MARCUS LIMA; LACERDA,CLAUDIVAN FEITOSA DE; ARAÚJO,MARIA EMÍLIA BEZERRA DE; LIMA,RONNEY MENDES MAGALHÃES DE; SOUZA,CARLOS HENRIQUE CARVALHO. |
| ABSTRACT The aim was to analyze the establishment of young “Green Dwarf” coconut plants in soils affected by salts and under water stress, by evaluating leaf area, biomass production and allocation. In the experiment, conducted in protected environment in Fortaleza, CE, in statistical design of randomized blocks in a split plot arrangement, the effects of different water deficit levels (plots) were evaluated, by imposing different percentages of replacement of water losses by potential crop evapotranspiration - ETpc (20, 40, 60, 80 and 100%), associated with subplots consisting of increasing soil salinity levels (1.72, 6.25, 25.80 and 40.70 dS m-1) provided by soil collected at different parts of the Morada Nova Irrigated Perimeter - PIMN. Leaf area and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cocos nucifera L.; Initial growth; Multiple stresses; Salinity; Drought. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452016000303001 |
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| 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 |
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| ROTUNDO,JOSÉ L; CIPRIOTTI,PABLO A; GUNDEL,PEDRO E. |
| We studied morphological and growth responses to drought of two sub-populations of Bromus pictus from communities with soils with different water availability from the Patagonian steppe. After a process of acclimatization common to both sub-populations, individuals from both sub-populations were subjected to three levels of water availability during 44 days. Independently of the water availability treatment, the sub-population from the community of high soil water availability showed higher aboveground relative growth rate (RGR) and higher leaf size (area and weight) compared to the sub-population from the community of low soil water availability. These results prove the expected evolution of higher growth rates and leaf sizes in resource rich... |
| Tipo: Journal article |
Palavras-chave: Arid lands; Drought; Ecotypes; Genetic variation; Soil depth. |
| Ano: 2006 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2006000100006 |
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| Carvajal,Danny E; Loayza,Andrea P; López,Ramiro P; Toro,Pablo J; Squeo,Francisco A. |
| BACKGROUND: In arid environments, where light and water supply are patchy in space and time, differences in how seedlings tolerate drought and shade conditions will determine the ability of a species to establish. Understanding seedling responses to the interactive effects of water and shade is critical to predict the future impact of increasing drought frequencies on plant communities across many arid ecosystems of the world. In this study, we used an experimental field approach to assess how different light (15%, 75%, and 95%) and water (natural rainfall (NR), NR +50 mm, NR +100 mm) levels affect seedling survival and growth of four Atacama Desert shrub species (Calliandra chilensis, Encella canescens, Proustia cuneifolia, and Senna cumingii). We... |
| Tipo: Journal article |
Palavras-chave: Seedling establishment; Facilitation; Drought; Atacama Desert. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2014000100025 |
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| Nunes,Luma Rayane de Lima; Pinheiro,Paloma Rayane; Silva,João Batista da; Dutra,Alek Sandro. |
| ABSTRACT Water is one of the most compromising factors in the germination and initial growth of seedlings, where its restriction causes a reduction in the water potential of cells in addition to causing oxidative stress. Ascorbic acid (AsA) is known to protect organelles and cells against the accumulation of ROS. The aim of this work was to study the effects of ascorbic acid on the conditioning of cowpea seeds subjected to water stress. The seeds of the BRS Marataoã and Setentão genotypes were conditioned at a concentration of 0.0 (control), 0.25, 0.50, 0.75 and 1.00 mM AsA, and sown on paper rolls (Germitest®) moistened with mannitol solution at a potential of 0.0 (control), -0.3, -0.6, -0.9 and -1.2 MPa, and stored in a germination chamber (BOD) at 25... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vigna unguiculata L.; Oxidative stress; Drought. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000200407 |
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| Pires,Marcel Viana; Cunha,Dênis Antônio da. |
| Plant breeding through the development of seeds resistant to water stress or high temperature is an important adaptive strategy to cope climate change. In this way, by providing an analysis of adaptation to climate change using genetic breeding on Brazilian farms, this work aims to investigate how climate change will affect the adoption of genetic breeding and profitability of farmers. Temperature and rainfall projections for 2010-2099 time periods were used, considering different climate scenarios (A1B and A2), according to the 4th Assessment Report of IPCC (2007). A Treatment Effects model outlines the analytical framework in this study. Our results indicate the probability of adopting transgenic seeds will grow from 74% in the current period to 86% in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Climate change; Adaptation; Breeding; Seeds; Drought; Heat. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-20032014000400001 |
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| González,María-Rosa; Hailemichael,Girma; Catalina,Álvaro; Martín,Pedro. |
| ABSTRACT: Although water deficit and iron deficiency chlorosis are common environmental stresses in the Mediterranean area, few data are reported in the literature on their effects on vineyards, when acting simultaneously. The main objective of this research was to study the combined effects of iron deficiency and water status on vigor, yield and fruit composition in rainfed vineyards. Moreover, the investigation aimed to evaluate the feasibility of using foliar chlorophyll content (Chl) and predawn leaf water potential (LWP), measured at veraison, to assess potential quality of grapes in the framework of precision viticulture. For this, 24 non-irrigated ‘Tempranillo’ vineyard subzones were monitored in Ribera del Duero (North-Central Spain) during three... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vitis vinifera L.; Chlorophyll; Drought; Leaf area index; Stress. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001600473 |
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| Meza,Sergio Enrique Espinoza; Arce,Marco Aliro Yáñez; Díaz,Carlos Renato Magni; Herrera,Eduardo Enrique Martínez; Ortega,Juan Francisco Ovalle; Miranda,Suraj Antonio Vaswani. |
| ABSTRACT: Intensification of drought in Mediterranean–type climates has limited seedling establishment. The knowledge of the ecology of selected species and its intraspecific variation to water stress at the seedling stage should be considered in order to overcome limitations. We investigated variations in growth, survival, and leaf–level physiology in four provenances of the endemic Cryptocarya alba (Mol.) during water stress and after re–watering. Seedlings were cultured in the nursery during 23 months and then subjected to two watering treatments based on soil water content (well–watered and water restriction, 0.38 and 0.17 cm3 cm−3, respectively) for 45 days. At the end of the watering treatments, seedling growth, above– and belowground biomass,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sclerophyllus forests; Seed sources; Drought; Plasticity; Biomass allocation. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000701002 |
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| Queiroz,Rafaela Josemara Barbosa; Santos,Durvalina Maria Mathias dos; Ferraudo,Antonio Sergio; Carlin,Samira Domingues; Silva,Marcelo de Almeida. |
| For sugarcane (Saccharum spp.) crops, the effects of an environmental stress, especially water deficiency, may cause severe productivity reduction, inferring negatively in the sugarcane industry. The tolerance of two sugarcane cultivars to a lack of water was made by analyzing the levels of the osmoprotectors, trehalose and free proline, and the biometrical variables of their initial growth. Biochemical and physiological responses of the cultivars, when subjected to water stress, were assayed to determine how these plants tolerate drought. The study was conducted in an acclimatized greenhouse (29.7 ± 4.3ºC and 75.0 ± 10.1% relative humidity) during 100 days and was divided into random blocks using a factorial 2 × 3 × 2 design (sugarcane cultivars × water... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum spp; Drought; Trehalose; Proline; Initial growth. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000400012 |
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| Nisachon Jangpromma; Prasit Jaisil; Patcharin Songsri; Prasan Swatsitang; Sakda Daduang; Sompong Thammasirirak. |
| Water-deficit stress is a major abiotic stress that causes severe limitations on the productivity of sugarcane. To overcome of this problem, drought tolerance sugarcane cultivars should be developed and selected for planting. Therefore, this study aims to evaluate the variation of electrolyte leakage (EL) and malondialdehyde (MDA) content of sugarcane leaves under water-deficit stress conditions. The greenhouse experiment was conducted using two water regimes as the first factor [(i) well-watered and (ii) stressed at 90 to 100 days after planting (DAP) and recovery 100 to 110 DAP] and 10 sugarcane cultivars (Uthong 6, Khon Kaen 80, Khon Kaen 3, K86-161, 03-4-425, KU60-1, B34-164, Phill 66-07, Uthong 2 and LF82-2122) as the second factor. A 2 × 10 factorial... |
| Tipo: Collection |
Palavras-chave: Drought; Lipid peroxidation; Saccharum officinarum; อ้อย; สายพันธุ์; ใบ; ปฏิกิริยาออกซิเดชันของไขมัน; สภาวะ-ขาดน้ำ; สารอิเล็กโทรไลต์; มาลอนไดแอลดีไฮด์; การรั่วไหลของสาร; เยื่อหุ้มเซลล์. |
| Ano: 2012 |
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5318 |
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| Registros recuperados: 147 | |
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