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Biomonitorização da poluição metálica por musgos
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ISBN10: 6208786592
ISBN13: 9786208786595
Publisher: Edicoes Nosso Conhecimento
Published: Mar 26 2025
Pages: 84
Weight: 0.27
Height: 0.20 Width: 6.00 Depth: 9.00
Language: Portuguese
ISBN13: 9786208786595
Publisher: Edicoes Nosso Conhecimento
Published: Mar 26 2025
Pages: 84
Weight: 0.27
Height: 0.20 Width: 6.00 Depth: 9.00
Language: Portuguese
A poluição atmosférica causada pelas actividades humanas tem consequências graves para os ecossistemas e para a saúde humana. De facto, estes elementos, que não são biodegradáveis na natureza, são altamente tóxicos para o ambiente e podem estar envolvidos em muitas doenças Leucodon sciuroides L., uma espécie de pirofita que serve de bioindicador para a região de Souk Ahras, está bem adaptada a condições ambientais adversas e tem caraterÃsticas de acumulação de metais pesados. Neste contexto, avaliámos a resposta anti-oxidativa de L. sciuroides em relação à exposição a metais pesados tratados hidroponicamente com 4000,2000,10, e 1 mg/ml e 400,200,20, e 2 mg/ml de dois metais pesados: zinco e cobre, durante 2,4,6, e 8 dias.A análise estatÃstica dos resultados obtidos mostra diferenças significativas entre as amostras tratadas e os controlos para a maioria dos parâmetros estudados, com um aumento dos teores de pigmentos de clorofila (a, b, a+b) acompanhado de um aumento dos teores de proteÃnas totais e açúcares solúveis, com uma redução dos teores de prolina. Uma depleção dos nÃveis de GSH no inÃcio do tratamento, sem atividade de biomarcadores enzimáticos notáveis (CAT e APX), o que reflecte a alta tolerância.
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