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Epibrassinolide and proline alleviate the photosynthetic and yield inhibition under salt stress by acting on antioxidant system in mustard.(Report)

Wani, Arif Shafi ; Ahmad, Aqil ; Hayat, Shamsul ; Tahir, Inayatullah

Plant Physiology et Biochemistry, 2019, Vol.135, p.385 [Periódico revisado por pares]

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  • Título:
    Epibrassinolide and proline alleviate the photosynthetic and yield inhibition under salt stress by acting on antioxidant system in mustard.(Report)
  • Autor: Wani, Arif Shafi ; Ahmad, Aqil ; Hayat, Shamsul ; Tahir, Inayatullah
  • Assuntos: Proline – Physiological Aspects ; PhotosynthesisPhysiological Aspects ; Plant Biochemistry – Physiological Aspects ; Enzymes – Physiological Aspects ; Salinity – Physiological Aspects ; Superoxides – Physiological Aspects ; Antioxidants (Nutrients) – Physiological Aspects
  • É parte de: Plant Physiology et Biochemistry, 2019, Vol.135, p.385
  • Descrição: Keywords Photochemical efficiency; Brassica juncea; Superoxide dismutase; Catalase; Transpiration rate Highlights * Role of proline in salt stress amelioration in the presence of EBL was investigated. * The highest salt concentration (5.6 dsm.sup.-1) caused maximum decrease. * The decrease was more pronounced in RH-30 than Varuna. * Out of proline and EBL, EBL excelled in its effects in both the varieties. * The foliar spray of proline + EBL completely overcome the toxicity caused by stress. Abstract Soil salinity is one of the major abiotic stress factors that hampers plant growth and productivity by limiting photosynthesis and other related metabolic processes. In this study we investigated whether treatment with proline and/or 24-epibrassinolide (EBL) to two contrasting cultivars of Brassica juncea (L.) Czern and Coss viz. Varuna and RH-30 could counteract with the adverse effects of salinity on photosynthesis and seed yield. Plants were treated with proline and/or 24-epibrassinolide (EBL) at 28 and 29d-stages of growth. Salt stress reduced plant growth, photosynthetic attributes, efficiency of PSII (Fv/Fm), leaf water potential and finally seed yield, at harvest but improved the activity of antioxidant enzymes in both the cultivars in a concentration dependent manner. Exogenous application of EBL with proline completely neutralised the adverse effects of salt at 78 mM or 117 mM stress levels whereas the treatment partially neutralised the impact of highest salt concentration of 156 mM, through the upregulation of the antioxidant system. Author Affiliation: (a) Plant Physiology and Biochemistry Research Lab, Department of Botany, University of Kashmir, Srinagar, 190006, India (b) Plant Physiology Section, Department of Botany, Aligarh Muslim University, Aligarh, 202002, India * Corresponding author. Article History: Received 25 September 2018; Revised 1 January 2019; Accepted 1 January 2019 Byline: Arif Shafi Wani [arif_sheen@yahoo.com] (a,*), Aqil Ahmad (b), Shamsul Hayat (b), Inayatullah Tahir (a)
  • Idioma: Inglês

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