Avaliação de genótipos de caupi sob salinidade

Dantas, José Pires; Marinho, Francisco José Loureiro; Ferreira, Magna Maria Macedo; Amorim, Maria do S. N.; Andrade, Sílvia I. de O.; Sales, Adriana L. de

doi:10.1590/s1415-43662002000300008

Cited by 36 publications

(33 citation statements)

References 4 publications

(3 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This result was due to the repeated leaching fractions and probably due to a selective mechanism for ions input by the plant roots to the grains of the V. unguiculata cultivar used. Dantas et al (2002) studied V. unguiculata genotypes and stated that some cultivars develop mechanisms of tolerance to soil salinity levels from 3 to 6 dS m -1 . The production component 100GW is resistant to changes induced by environmental stress, such as the stress caused by salinity (LOCATELI ET AL., 2014).…”

Section: Resultsmentioning

confidence: 99%

PRODUCTION COMPONENTS OF Vigna unguiculata (L. Walp) IRRIGATED WITH BRACKISH WATER UNDER DIFFERENT LEACHING FRACTIONS

Carvalho

Silva

et al. 2016

Rev. Caatinga

View full text Add to dashboard Cite

-The objective of this work was to evaluate the production components of cowpea (Vigna unguiculata L. Walp) subjected to irrigation with brackish water and different leaching fractions. The experiment was conducted in a lysimeter system of the Department of Agricultural Engineering of the Federal Rural University of Pernambuco, Recife campus. The treatments, consisting of two water salinity levels (ECw) (1.2 and 3.3 dS m -1 ) and five leaching fractions (0, 5, 10, 15 and 20%), were evaluated using a completely randomized design in a 2x5 factorial arrangement with four replications. The variables evaluated were: number of pods per plant, 100-grain weight, number of grains per pod, grain and shoot dry weight, grain yield and harvest index. The soil salinity increased with increasing salinity of the water used for irrigation, and reduced with increasing leaching fraction. The salinity of the water used for irrigation influenced only the variables number of pods per plant and grain yield. The estimated leaching fractions of 9.1% and 9.6% inhibited the damage caused by salinity on the number of pods per plant and grain yield, respectively. Therefore, the production of V. unguiculata irrigated with brackish water, leaching salts from the plant root environment, is possible under the conditions evaluated.Keywords: Cowpea. Yield. Water salinity. Irrigation management. COMPONENTES DE PRODUÇÃO DE Vigna unguiculata (L. Walp) IRRIGADO COM ÁGUA SALOBRA SOB FRAÇÕES DE LIXIVIAÇÃORESUMO -Objetivou-se, com este trabalho, avaliar os componentes de produção do feijão-caupi (Vigna unguiculata) submetido à irrigação com água salobra e frações de lixiviação. O estudo foi conduzido em sistema de lisimetria no Departamento de Engenharia Agrícola da Universidade Federal Rural de Pernambuco, Campus Recife. Os tratamentos consistiram em dois níveis de salinidade da água (CEa -1,2 e 3,3 dS m -1 ) e de cinco frações de lixiviação (0, 5, 10, 15 e 20%), em delineamento inteiramente casualizado em esquema fatorial 2 x 5, com quatro repetições. As variáveis avaliadas foram: número de vagens por planta, massa de 100 grãos, número de grãos por vagem, biomassa seca de grãos e da parte aérea, produtividade de grãos e índice de colheita. A salinidade do solo aumentou com a salinidade da água de irrigação, mas foi reduzida com a fração de lixiviação. Exceto o número de vagens por planta e a produtividade de grãos, as demais variáveis não foram influenciadas pelas salinidades da água de irrigação. As frações de lixiviação estimadas de 9,1 e 9,6% inibem os danos provocados pela salinidade sobre o número de vagens por planta e produtividade de grãos, respectivamente. Nas condições estudadas, é possível se produzir feijão-caupi irrigado com água salobra sob lixiviação de sais do ambiente radicular das plantas.Palavras-chave: Feijão-caupi. Rendimento. Salinidade da água. Manejo da irrigação.

show abstract

Section: Resultsmentioning

confidence: 99%

PRODUCTION COMPONENTS OF Vigna unguiculata (L. Walp) IRRIGATED WITH BRACKISH WATER UNDER DIFFERENT LEACHING FRACTIONS

Carvalho

Silva

et al. 2016

Rev. Caatinga

View full text Add to dashboard Cite

show abstract

“…Nestas áreas, as baixas precipitações associadas com a intensa evapo-transpiração contribuem para agravar a salinização do solo (Dantas et al 2002). O rendimento agrícola é comprometido pela salinidade devido ao défi cit hídrico induzido pela alta osmolaridade da solução do solo (Munns 2002), além da toxicidade iônica relacionada com desbalanços nutricionais e desordens metabólicas (Gratan & Grieve 1999), os quais acarretam a inibição do crescimento.…”

Section: Introductionunclassified

Atividade de enzimas antioxidantes e inibição do crescimento radicular de feijão caupi sob diferentes níveis de salinidade

et al. 2012

View full text Add to dashboard Cite

ABSTRACT(Activities of antioxidant enzymes and root growth inhibition in cowpea seedlings exposed to diff erent salt levels). Phenol peroxidase (POX) is a dual enzyme that is involved with hydrogen peroxide scavenging and lignin biosynthesis, contributing to growth inhibition by secondary wall thickening. In order to relate growth inhibition to salt-induced oxidative modulation, the activities of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX) and POX were evaluated in cowpea roots under salinity. Four-day-old seedlings of the Pitiúba and Pérola cultivars were exposed to 0, 25, 50, 75 and 100 mM NaCl in germination paper under controlled conditions. Aft er two days of treatment, root length was reduced under 100 mM NaCl by 56 and 26% in Pitiúba and Pérola, respectively, which was associated with enhanced electrolyte leakage and cell death in the root apex. NaCl salinity did not trigger lipid peroxidation, indicating that cell death was probably due to membrane damage instead of oxidative stress. Salt stress reduced the activity of SOD, CAT and APX and increased the POX activity, demonstrating that this enzyme plays a role in oxidative protection in cowpea roots exposed to NaCl salinity. In conclusion, salt-induced growth inhibition in cowpea roots could be attributed, at least in part, to a coordinate action involving an increase in POX activity and a drop in CAT and APX activities. Atividade de enzimas antioxidantes e inibição do crescimento radicular de feijão caupi sob diferentes níveis de salinidade

show abstract

“…O feijão caupi é uma leguminosa de alto valor protéico que, a cada dia, conquista maior valor agroeconômico, graças à sua característica de adaptabilidade às condições adversas (Carvalho et al, 2000;Dantas et al, 2002). No Nordeste brasileiro é uma espécie muito cultivada representando um dos alimentos básicos da população dessa região (Freitas, 2006), além de possuir características adaptativas, intrínsecas à região Nordeste, como suportar altas temperaturas e locais com limitações hídricas (Sousa, 2006).…”

Section: Introductionunclassified

Temperaturas elevadas afetam a distribuição de íons em plantas de feijão caupi pré-tratadas com NaCl1

Dutra

Silva

Rodrigues

et al. 2011

Rev. bras. eng. agríc. ambient.

View full text Add to dashboard Cite

The purpose of this study was to characterize the effect of temperature on the distribution of Na + , Cl -and K + in roots, stems and leaves of cowpea pre-treated with NaCl. After the acclimation period, plants were divided into two groups: 0 NaCl and 100 mM NaCl for 2 days. Subsequently, the plants were divided into 4 sub-groups and subjected to increasing temperatures of 27, 32, 37 and 42 °C, separately, for a photoperiod of 12 hours at each temperature. The treatment without NaCl at 27 ºC was used as reference. The concentrations of Na + and Cl -in different organs were increased by pretreatment with NaCl and this accumulation was intensified by exposure to high temperatures. In roots, for example, at temperature of 42 ºC concentrations of Na were four times higher than in leaves. While Cl -accumulated mainly in leaves, with a 20-fold increase in the concentration of this ion in relation to reference plants. Inversely, K + concentrations were reduced in all organs analyzed. Thus, it is conclude that high temperatures affect the distribution of ions in different organs directly affecting ion homeostasis in plants.

show abstract

Avaliação de genótipos de caupi sob salinidade

Cited by 36 publications

References 4 publications

PRODUCTION COMPONENTS OF Vigna unguiculata (L. Walp) IRRIGATED WITH BRACKISH WATER UNDER DIFFERENT LEACHING FRACTIONS

PRODUCTION COMPONENTS OF Vigna unguiculata (L. Walp) IRRIGATED WITH BRACKISH WATER UNDER DIFFERENT LEACHING FRACTIONS

Atividade de enzimas antioxidantes e inibição do crescimento radicular de feijão caupi sob diferentes níveis de salinidade

Temperaturas elevadas afetam a distribuição de íons em plantas de feijão caupi pré-tratadas com NaCl1

Contact Info

Product

Resources

About