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Physiological and toxic effects of selenium on seed germination of cowpea seedlings Bragantia
Lapaz,Allan de Marcos; Santos,Luiz Felipe de Melo; Yoshida,Camila Hatsu Pereira; Heinrichs,Reges; Campos,Marcelo; Reis,André Rodrigues dos.
ABSTRACT Selenium (Se) is considered a beneficial chemical element for plants, but in high concentrations it may present symptoms of toxicity. The present study aimed to evaluate 11 concentrations of Se (0; 0.1; 0.5; 1; 5; 10; 20; 40; 80; 400; 800 mg.L-1) to determine the low and high (toxicity) critical levels to seed germination of cowpea (Vigna unguiculata). In addition, alterations in the rate of photosynthetic pigments, lipid peroxidation and sugars during the initial growth development of seedlings were analysed. Seeds exposed to 800 mg.L-1 of Se showed a decrease of 20% of seed germination index compared to the control treatment. The decrease in seedling growth reflected in the increase of total sugars and sucrose concentration in both the shoot and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soluble sugars; Oxidative metabolism; Phytotoxicity; Vigna unguiculata.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000400498
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Sulfur modulates yield and storage proteins in soybean grains Scientia Agricola
Ibañez,Thiago Bergamini; Santos,Luiz Felipe de Melo; Lapaz,Allan de Marcos; Ribeiro,Igor Virgilio; Ribeiro,Filipe Virgilio; Reis,André Rodrigues dos; Moreira,Adônis; Heinrichs,Reges.
ABSTRACT This study evaluated the nutritional quality, yield, and storage protein modulation in soybean grains in response to levels and sources of sulfur (S) in a dystrophic Ultisol. We used five levels of S (0, 50, 100, 150 and 200 mg kg –1 ) and four sources of S (elemental S pastille - ESPA, gypsum - GY, gypsite - GI and elemental S powder - ESPO). Plants treated with 50 mg kg –1 of GY, GI, and ESPO and 200 mg kg –1 of ESPA had the largest grain yield values. Low S supply resulted in lower yields for all S sources tested. Sulfur deficiencies were observed at all levels for ESPA, resulting in lower concentrations of globulin and higher concentration of glutelin and albumin in the grains, possibly because the S content in the leaf was below the range...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max; Plant nutrition; Elemental sulfur; Sulfate.
Ano: 2021 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000101402
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