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Combined effect of 24-epibrassinolide and salicylic acid mitigates lead (Pb) toxicity by modulating various metabolites in Brassica juncea L. seedlings.
Kohli, Sukhmeen Kaur; Handa, Neha; Sharma, Anket; Gautam, Vandana; Arora, Saroj; Bhardwaj, Renu; Alyemeni, Mohammed Nasser; Wijaya, Leonard; Ahmad, Parvaiz.
Afiliação
  • Kohli SK; Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, 143005, India.
  • Handa N; Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, 143005, India.
  • Sharma A; Department of Botany, DAV University, Sarmastpur, Jalandhar, 144012, India.
  • Gautam V; Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, 143005, India.
  • Arora S; Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, 143005, India.
  • Bhardwaj R; Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, 143005, India. renubhardwaj82@gmail.com.
  • Alyemeni MN; Department of Botany and Microbiology, Faculty of Science, King Saud University, Riyadh, 11451, Saudi Arabia.
  • Wijaya L; Department of Botany and Microbiology, Faculty of Science, King Saud University, Riyadh, 11451, Saudi Arabia.
  • Ahmad P; Department of Botany and Microbiology, Faculty of Science, King Saud University, Riyadh, 11451, Saudi Arabia. parvaizbot@yahoo.com.
Protoplasma ; 255(1): 11-24, 2018 Jan.
Article em En | MEDLINE | ID: mdl-28573335
ABSTRACT
The present study demonstrated the combined effect of 24-epibrassinolide and salicylic acid against lead (Pb, 0.25, 0.50, and 0.75 mM) toxicity in Brassica juncea seedlings. Various parameters including water status, metal uptake, total water- and lipid-soluble antioxidants, metal chelator content (total thiols, protein-bound thiols, and non-protein-bound thiols), phenolic compounds (flavonoids, anthocyanins, and polyphenols), and organic acids were studied in 10-day-old seedlings. Dry matter content and the heavy metal tolerance index were reduced by 42.24 and 52.3%, respectively, in response to Pb treatment. Metal uptake, metal-chelating compounds, phenolic compounds, and organic acids were increased in Pb-treated seedlings as compared to control plants. The treatment of Pb-stressed seedlings with combination of EBL and SA resulted in enhancement of heavy metal tolerance index by 40.07%, water content by 1.84%, and relative water content by 23.45%. The total water- and lipid-soluble antioxidants were enhanced by 21.01 and 2.21%, respectively. In contrast, a significant decline in dry weight, metal uptake, thiol, and polyphenol contents was observed following the application of 24-epibrassinolide and salicylic acid. These observations indicate that Pb treatment has an adverse effect on B. juncea seedlings. However, co-application of 24-epibrassinolide and salicylic acid mitigates the negative effects of Pb, by lowering Pb metal uptake and enhancing the heavy metal tolerance index, water content, relative water content, antioxidative capacities, phenolic content, and organic acid levels.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Esteroides Heterocíclicos / Raízes de Plantas / Ácido Salicílico / Plântula / Brassinosteroides / Chumbo / Mostardeira Idioma: En Revista: Protoplasma Ano de publicação: 2018 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Esteroides Heterocíclicos / Raízes de Plantas / Ácido Salicílico / Plântula / Brassinosteroides / Chumbo / Mostardeira Idioma: En Revista: Protoplasma Ano de publicação: 2018 Tipo de documento: Article