Mudanças bioquímicas em genótipos de amendoim submetidos a déficit hídrico moderado

Pereira, Jacqueline Wanessa de Lima; Filho, Péricles de Albuquerque Melo; Albuquerque, Manoel Bandeira de; Nogueira, Rejane Jurema Mansur Custódio; Santos, Roseane Cavalcanti dos

doi:10.1590/s1806-66902012000400019

Cited by 48 publications

(66 citation statements)

References 19 publications

(15 reference statements)

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“…The best results was obtained to BR 1, L81V and L108V at 1.4X, 1.3X and 1.3X, respectively (Table 2). The increasing of some organic solutes in plant tissues under abiotic stress is a natural process in response to changes of cell metabolism, in natural conditions (AZEVEDO NETO et al, 2009;WASEEM et al, 2011;PEREIRA et al, 2012). According to Waseem et al (2011), to maintain the hydric balance, plants often alter their metabolism in order accumulating organic solutes, amino acids, organic acids, and ions, especially potassium.…”

Section: Resultsmentioning

confidence: 99%

“…These forms are accumulated in cell as by-products of aerobic metabolism processes and photooxidation (APEL; HIRT, 2004;KARUPPANAPANDIAN et al, 2009;PEREIRA et al, 2012). Being reactive, they alter the cell metabolism by oxidative damage to lipids, proteins and nucleic acids (AZEVEDO NETO et al, 2009;FOYER;NOCTOR, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…In condition of severe stress, this regulation is lost due to increased production of free radicals, triggering a series of events, starting with the peroxidation of lipids, followed by membrane degradation and cell death (APEL; HIRT, 2004;AZEVEDO NETO et al, 2009;KARUPPANAPANDIAN et al, 2009;SANKAR et al, 2007). In order to adjust osmotically, plants retain the water potential and turgor of the adjacent cells the appropriate level, producing and accumulating organic compounds such as sugars, proline, organic acids and others (NEPOMUCENO et al, 2001;FAROOQ et al, 2009;PEREIRA et al, 2012). Proline is one of the most studied osmoregulators, due to its active involvement in cell response to environmental stresses.…”

Section: Introductionmentioning

confidence: 99%

“…Proline is one of the most studied osmoregulators, due to its active involvement in cell response to environmental stresses. According to some authors, plants tolerant to physiological stresses synthesize a higher amount of proline (MAIA et al, 2007;PEREIRA et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Genotypic Variability of Peanut Lines in Response to Water Stress, Based on Biochemical Descriptors

et al. 2016

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-Seven biochemical descriptors were used to estimate the genotypic variability of peanut in response to moderate water stress. Six genotypes, constituted by four lines and two cultivars, were grown in pots, each containing two plants. At 15 days after emergence (DAE), the treatment differentiation was carried out: Control-plants maintained with daily watering, and Stress-plants submitted to water stress by complete suspension of watering for 15 days. The experimental design was completely randomized with factorial scheme 6 x 2 (genotype x water treatments), with five replications. The biochemical variables evaluated were: catalase (CAT), ascorbate peroxidase (APX), guaiacol peroxidase (GPX), free proline, total carbohydrates, soluble proteins, and amino acids. Results obtained by biochemical analysis and estimation of genotypic variability indicated that proline is the most appropriate descriptor for selecting genotypes tolerant to water stress, which led to identification of L81V and L108V as promising lines for drought tolerance breeding program. Keywords:Arachis hypogaea L. Antioxidative enzymes. Organic solutes. Drought tolerance. VARIABILIDADE GENOTÍPICA DE AMENDOIM EM RESPOSTA A ESTRESSE HÍDRICO BASEADA EM DESCRITORES BIOQUÍMICOSRESUMO -Sete descritores bioquímicos foram utilizados para estimar a variabilidade genotípica de linhagens de amendoim submetidas a estresse hídrico moderado. Seis genótipos, sendo quatro linhagens e duas cultivares, foram cultivados em vasos, cada um contendo duas plantas e mantidas em casa de vegetação. Aos 15 dias após a emergência, procedeu-se a diferenciação dos tratamentos: Controle, as plantas mantidas com rega diariamente; Estresse, as plantas submetidas à suspensão total de rega durante 15 dias. O delineamento experimental foi inteiramente casualizado, com esquema fatorial 6 x 2 (genótipos x tratamentos hídricos), com cinco repetições. As variáveis bioquímicas avaliadas foram: catalase (CAT), ascorbato peroxidase (APX), guaiacol peroxidase (GPX), prolina livre, carboidratos totais, proteínas solúveis e aminoácidos. Baseado nos resultados das análises bioquímicas e de estimativa da variabilidade genotípica, a prolina demonstrou ser o descritor mais adequado para seleção de genótipos tolerantes ao estresse hídrico, contribuindo para indicar as linhagens L81V e L108V como mais promissoras, para um programa de melhoramento visando tolerância à seca. Palavras-chave:Arachis hypogaea L. Enzimas antioxidativas. Solutos orgânicos. Tolerância à seca.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Genotypic Variability of Peanut Lines in Response to Water Stress, Based on Biochemical Descriptors

et al. 2016

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“…Para as análises de proteínas totais e carboidratos, o extrato bruto foi obtido de folhas frescas, na concentração de 20% em tampão fosfato de potássio monobásico 100 mM, EDTA 0,1 mM, pH 7,0, seguindo metodologia descrita por Pereira et al (2012). A concentração das proteínas totais foi determinada pelo método de Bradford (1976) e a leitura realizada a 595 nm.…”

Section: Methodsunclassified

Prospecção de descritores para seleção de genótipos de amendoim tolerantes a pragas de grãos armazenados

Santos

Luz

Pinheiro

et al. 2014

Rev. bras. eng. agríc. ambient.

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5 R E S U M OAs inter-relações entre descritores bioquímicos e agronômicos foram investigadas em genótipos de amendoim visando identificar indicadores de seleção para tolerância a pragas de grãos armazenados, com base na capacidade inibitória para tripsina e quimotripsina. Dez genótipos foram cultivados em campo, em 2011/2012, e suas sementes utilizadas para os ensaios bioquímicos. Quatro descritores agronômicos foram utilizados para compor as análises de correlação. Sete genótipos revelaram alta capacidade inibitória para tripsina, com mais de 80% de inibição; contudo, para quimotripsina, observou-se baixa inibição em todos os genótipos, variando entre 4 e 12%. Nas análises de correlação não foram observadas inter-relações significativas entre os inibidores e as demais variáveis, com exceção de inibidor de tripsina x proteínas nas folhas, que revelou correlação negativa de alta magnitude indicando que alto teor de proteínas nas folhas pode reduzir o nível de inibidor de tripsina nas sementes. Este descritor poderia ser utilizado como indicador de seleção para tolerância a pragas de grãos armazenados, com o benefício de não destruir a semente. Prospecting of descriptors for selection of peanut genotypes tolerant to stored grain pests A B S T R A C TThe interrelations between biochemical and agronomic descriptors were investigated in peanut genotypes in order to identify selection indicators for tolerance to stored grain pests, based on the inhibitory capacity for trypsin and chymotrypsin. Ten genotypes were grown in field, in 2011/2012, and their seeds were further used for biochemical assays. Four agronomic traits were used in order to compose the correlation analysis. Seven genotypes showed high inhibitory capacity for trypsin with more than 80% inhibition; however, chymotrypsin inhibition was low in all genotypes, varying between 4 and 12%. No significant interrelationships between inhibitors and the other variables were seen in correlation analysis, except trypsin inhibitor x leaves protein, which revealed a negative correlation with high magnitude, indicating that a high protein content in the leaves can reduce the level of trypsin inhibitor in the seeds. This descriptor could be used as a selection indicator for tolerance to stored grain pests, adding the benefit of saving the seed.

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Abiotic Stress Responses in Groundnut (Arachis hypogaea L.): Mechanisms and Adaptations

Kalarani

Senthil

Punitha

et al. 2023

Legumes: Physiology and Molecular Biology of Abiotic Stress Tolerance

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Mudanças bioquímicas em genótipos de amendoim submetidos a déficit hídrico moderado

Cited by 48 publications

References 19 publications

Genotypic Variability of Peanut Lines in Response to Water Stress, Based on Biochemical Descriptors

Genotypic Variability of Peanut Lines in Response to Water Stress, Based on Biochemical Descriptors

Prospecção de descritores para seleção de genótipos de amendoim tolerantes a pragas de grãos armazenados

Abiotic Stress Responses in Groundnut (Arachis hypogaea L.): Mechanisms and Adaptations

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