Seleção varietal de Phaseolus vulgaris quanto à tolerância ao estresse salino com base em variáveis de crescimento

Araújo, Cícero Antônio de Souza; Ruíz, Hugo Alberto; Cambraia, José; Neves, Júlio César Lima; Freire, Maria Betânia Galvão dos Santos; Freire, Fernando José

doi:10.1590/s0034-737x2010000100021

Cited by 4 publications

(6 citation statements)

References 27 publications

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“…Reduction in the production of photoassimilates in plants subjected to saline stress is mainly associated with the toxic effect of ions such as Na + and Cl -on the net C fixation (Araújo et al, 2010). In addition, the data show that the split-root technique allows saline water to be used without significant losses in plant growth.…”

Section: Resultsmentioning

confidence: 94%

Heterogeneous salinity in the root system of bell pepper in greenhouse

Oliveira

Alves

Bezerra

et al. 2018

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe split-root technique was used as a strategy to reduce saline stress on pepper. A completely randomized design with six treatments and four replicates was used. The treatments consisted of six saline water application strategies (T1 -salinized nutrient solution (S1 = 1.4 dS m ) throughout the cycle, T3 -S1 and S2 throughout the cycle, using two emitters and without splitting the root system, T4 -S1 and S2, using two emitters and splitting the root system by a plastic film, T5 -S1 and S2, using two emitters and splitting the root system, alternating the solutions every 15 days, T6 -S1 and S2, using two emitters and without splitting the root system, alternating the solutions every 15 days). Five fruit harvests were performed, and the plants were harvested at 85 days after initiation of treatments and evaluated for the following variables: leaf number, leaf area, plant height, stem diameter, shoot dry matter (stem + leaves + fruits), root dry matter, number of fruits, fresh fruit weight and fruit production per plant. Most of the variables were reduced by the salinity of irrigation water. The highest fruit yields were obtained using low-salinity water, with the mixture of non-saline and saline waters, and alternating biweekly when the root system was split, demonstrating the viability of these three techniques.Salinidade heterogênea no sistema radicular de pimentão em ambiente protegido R E S U M O A técnica de divisão do sistema radicular foi utilizada como estratégia para reduzir o estresse salino em pimentão. Utilizou-se o delineamento inteiramente casualizado com seis tratamentos e quatro repetições. Os tratamentos foram constituídos por seis estratégias de aplicação de água salina (T1 -solução nutritiva não salinizada (S1 = 1,4 dS m ) durante todo o ciclo; T3 -S1 e S2 durante todo o ciclo, utilizando dois emissores e sem divisão do sistema radicular; T4 -S1 e S2, utilizando dois emissores e divisão do sistema radicular por um filme plástico; T5 -S1 e S2, utilizando dois emissores com divisão do sistema radicular, alternando-se as águas a cada 15 dias; T6 -S1 e S2, utilizando dois emissores sem divisão do sistema radicular, alternando-se as águas a cada 15 dias). Foram realizadas cinco colheitas de frutos e as plantas foram coletadas aos 85 dias após início dos tratamentos, e avaliadas quanto às seguintes variáveis: número de folhas, área foliar, altura da planta, diâmetro do caule, massa seca parte aérea (caule + folhas + frutos) e de raiz, número de frutos, massa fresca de frutos e produção de frutos por planta. A maioria das variáveis foi reduzida pela salinidade da água de irrigação. Os maiores rendimentos de frutos foram obtidos com uso de água de baixa salinidade, com a mistura de águas não salinas e salinas, e com alternação quinzenal quando utilizando a divisão do sistema radicular, demonstrando a viabilidade destas três técnicas.

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Section: Resultsmentioning

confidence: 94%

Heterogeneous salinity in the root system of bell pepper in greenhouse

Oliveira

Alves

Bezerra

et al. 2018

Rev. bras. eng. agríc. ambient.

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“…In the present study, the decreased LA may be related to an adaptation mechanism to salinity, allowing water conservation by reducing transpiration area. The decrease in leaf area has been observed in several plant species in response to increasing NaCl concentrations (Medeiros, et al, 2012;Araújo, et al, 2010;Neto and Tabosa, 2000). The lowest RDM values were observed for estimated concentrations of 106.7 and 100 mM NaCl in the nutrient solution for the Aguará 4 and Agrobel 963 cultivars, respectively.…”

Section: Discussionmentioning

confidence: 92%

Photosynthesis and water relations of sunflower cultivars under salinity conditions

Maia¹,

Costa²,

Castro³

et al. 2016

Afr. J. Agric. Res.

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The study of photosynthetic responses in plants provides useful information for understanding the physiological processes involved in the salinity tolerance and susceptibility mechanisms of sunflower cultivars. The aim of the present study was to evaluate the gas exchange responses, water relations (stress hydric), and growth characteristics of two sunflower cultivars, Agrobel 963 and Aguará 4, subjected to different salt concentrations. The study was conducted in a randomized block experimental design through a 2 x 5 factorial arrangement, with the factors being two sunflower cultivars (Agrobel 963 and Aguará 4) and five salt concentrations (0, 25, 50, 100 and 150 mM NaCl) applied in Hoagland nutrient solution, with five replicates. Gas exchange, water relations and growth characteristics were evaluated. The gas exchange measurements showed that the two sunflower cultivars maintained the photosynthetic activity per unit of leaf area even at the highest NaCl concentration tested (150 mM). With the increasing salinity in the nutrient solution, the leaf water potential decreased, while the concentration of optically active substances increased in both the leaves and roots, which helped maintain the plant's water status. Reduction on dry mass of sunflowers was response to decreasing on the leaf total area and not as effect of salinity on the photosynthetic rate by leaf area unity.

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“…According to Araújo et al (2010) the reduction in dry mass production is mainly associated to the toxic effect of ions such as Na + and Clon the carbon fixation and consequent photoassimilates production.…”

Section: Resultsmentioning

confidence: 99%

“…The leaf area decreases were probably associated to defense mechanisms of plants under salt stress aiming to reduce water loss through transpiration (TAIZ; ZEIGER, 2013). The reduction in leaf area with consequent reduction in the cells volume probably contributed to the osmotic adjustment, assuming the amount of solute absorbed is concentrated in a smaller volume of cell juice (ARAÚJO et al, 2010). This reduction also represents changes in photoassimilate partitioning and limitation in area for the photosynthetic process , which may be related to the reduction in dry matter production.…”

Section: Resultsmentioning

confidence: 99%

“…Those processes reflect directly on plant growth, and may interfere with their height (VIEIRA et al 2005), leaf area (ARAÚJO et al, 2010) and plant water content (FERNANDES et al, 2011). Changes in accumulation and partitioning of dry matter due to the influence on CO2 assimilation; production and distribution of photoassimilates can be affected too (AQUINO; LACERDA; GOMES-FILHO, 2007).…”

Section: Introductionmentioning

confidence: 99%

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GROWTH AND FOLIAR CONTENTS OF Na+ AND Cl- IN GENOTYPES OF FORAGE SORGHUM IRRIGATED WITH SALINIZED WATERS

Coelho

Simões

Salviano

et al. 2018

R_I

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GROWTH AND FOLIAR CONTENTS OF Na+ AND Cl- IN GENOTYPES OF FORAGE SORGHUM IRRIGATED WITH SALINIZED WATERS DANIELA SIQUEIRA COELHO1; WELSON LIMA SIMÕES2; ALESSANDRA MONTEIRO SALVIANO3; MOISÉS ALVES DE SOUZA4; JAIR ANDRADE LIMA5 E JOSÉ EZEQUIEL DE SANTOS6 1 Instituto do Meio Ambiente e Recursos Hídricos, rua A, s/n, 48906-652, Juazeiro - BA, e-mail: daniela.coelho@hotmail.com.br2 Embrapa Semiárido, rodovia BR-428, Km 152, s/n, Zona Rural, 56302-970, Petrolina - PE, e-mail: welson.simoes@embrapa.br3 Embrapa Semiárido, rodovia BR-428, Km 152, s/n, Zona Rural, 56302-970, Petrolina - PE, e-mail: alessandra.salviano@embrapa.br4 Departamento de Biologia – Fisiologia Vegetal, Universidade Federal de Lavras, Câmpus Universitário, Caixa Postal 3037, 37200-000, Lavras - MG, e-mail: moisesalves-1989@hotmail.com5 Embrapa Semiárido, rodovia BR-428, Km 152, s/n, Zona Rural, 56302-970, Petrolina - PE, e-mail: jairred_@hotmail.com6 Departamento de Biologia, Universidade de Pernambuco, rodovia BR 203, Km 2, s/n, 56328-903, Petrolina - PE,e-mail: ezequielsantos93@hotmail.com 1 ABSTRACT Plant efficiency in developing specific mechanisms to survive under salt stress can vary significantly among genotypes, which implies different responses in growth and yield. The aim of this study was to evaluate the salt tolerance of forage sorghum genotypes by analysis of growth variables correlated with the levels of Na+ and Cl- accumulated in the leaves. The research was carried out in a greenhouse belonging to the Brazilian Agricultural Research Corporation (EMBRAPA) – Semiarid, in Petrolina, Pernambuco state, Brazil. The treatments were arranged in a randomized block design with factorial arrangement 10x6 with ten genotypes (‘F305’, ‘BRS 655’, ‘BRS 610’, ‘Volumax’, ‘1,015,045’, ‘1,016,005’, ‘1,016,009’, ‘1,016,013’, ‘1,016,015’ and ‘1,016. 031’), salt solutions with six levels of electrical conductivity (0, 2.5, 5.0, 7.5, 10 and 12.5 dS m-1) and three replications. The variables evaluated were dry mass and water content of the shoots and roots, plant height, stern diameter, leaf area and foliar concentration of Na+ and Cl-. It was found that the growth of forage sorghum genotypes is similarly affected due to the increase of Na+ and Cl- foliar contents. The growth of forage sorghum is reduced by 50% when the plants are submitted to the application of saline solution with electrical conductivity of 8 dS m-1. Keywords: leaf area, salt stress, dry matter, Sorghum bicolor (L.) Moench. COELHO, D. S.; SIMÕES, W. L.; SALVIANO, A. M.; SOUZA, M. A. de; LIMA, J. A.; SANTOS, J. E. deCRESCIMENTO E TEORES FOLIARES DE Na+ E Cl- EM GENÓTIPOS DE SORGO FORRAGEIRO IRRIGADOS COM ÁGUAS SALINIZADAS 2 RESUMO A eficiência das plantas em desenvolver mecanismos específicos para sobreviver ao estresse salino pode variar significativamente entre genótipos, implicando em respostas diferenciadas no seu crescimento e rendimento. O objetivo do presente estudo foi avaliar o crescimento e teores foliares de Na+ e Cl- em dez genótipos de sorgo forrageiro submetidos a irrigações com águas salinizadas. O experimento foi conduzido em casa de vegetação localizada na sede da Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) – Semiárido, em Petrolina – PE. Utilizou-se o delineamento experimental em blocos casualizados dispostos em esquema fatorial 10x6, considerando dez genótipos (‘F305’, ‘BRS 655’, ‘BRS 610’, ‘Volumax’, ‘1.015.045’, ‘1.016.005’, ‘1.016.009’, ‘1.016.013’, ‘1.016.015’ e ‘1.016.031’), soluções salinas com seis valores de condutividade elétrica (0; 2,5; 5,0; 7,5; 10 e 12,5 dS m-1) e três repetições. As variáveis avaliadas foram massa seca e conteúdo de água da parte aérea e raízes, altura da planta, diâmetro do colmo, área foliar e teores foliares de Na+ e Cl-. Verificou-se que o crescimento dos genótipos de sorgo forrageiro foi afetado similarmente com o aumento da salinidade devido à elevação das concentrações de Na+ e Cl- nas folhas. O crescimento do sorgo forrageiro é reduzido em 50% quando as plantas são submetidas à aplicação de solução salina com condutividade elétrica de 8 dS m-1. Palavras-chave: área foliar, salinidade, massa seca, Sorghum bicolor (L.) Moench.

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Seleção varietal de Phaseolus vulgaris quanto à tolerância ao estresse salino com base em variáveis de crescimento

Cited by 4 publications

References 27 publications

Heterogeneous salinity in the root system of bell pepper in greenhouse

Heterogeneous salinity in the root system of bell pepper in greenhouse

Photosynthesis and water relations of sunflower cultivars under salinity conditions

GROWTH AND FOLIAR CONTENTS OF Na+ AND Cl- IN GENOTYPES OF FORAGE SORGHUM IRRIGATED WITH SALINIZED WATERS

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