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Ultraviolet-B expos...
Ultraviolet-B exposure and exogenous hydrogen peroxide application lead to cross-tolerance toward drought in Nicotiana tabacum L.
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- Sáenz-de la, O. Diana (författare)
- Biosystems Engineering, School of Engineering, Autonomous University of Queretaro-Campus Amazcala, Querétaro, Mexico
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- Morales, Luis Orlando, 1974- (författare)
- Örebro universitet,Institutionen för naturvetenskap och teknik,Molecular Biochemistry
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- Strid, Åke, Professor, 1960- (författare)
- Örebro universitet,Institutionen för naturvetenskap och teknik
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- Torres-Pacheco, Irineo (författare)
- Biosystems Engineering, School of Engineering, Autonomous University of Queretaro-Campus Amazcala, Querétaro, Mexico
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- Guevara-Gonzáles, Ramón G. (författare)
- Biosystems Engineering, School of Engineering, Autonomous University of Queretaro-Campus Amazcala, Querétaro, Mexico
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(creator_code:org_t)
- 2021-05-20
- 2021
- Engelska.
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Ingår i: Physiologia Plantarum. - : Blackwell Publishing. - 0031-9317 .- 1399-3054. ; 173:3, s. 666-679
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Abstract
Ämnesord
Stäng
- Acclimation of plants to water deficit involves biochemical and physiological adjustments. Here, we studied how UV‐B exposure and exogenously applied hydrogen peroxide (H2O2) potentiates drought tolerance in tobacco (Nicotiana tabacum L. cv. xanthi nc). Separate and combined applications for 14 days of 1.75 kJ m−2 day−1 UV‐B radiation and 0.2 mM H2O2 were assessed. Both factors, individually and combined, resulted in inhibition of growth. Furthermore, the combined treatment led to the most compacted plants. UV‐B‐ and UV‐B+H2O2‐treated plants increased total antioxidant capacity and foliar epidermal flavonol index. H2O2‐ and UV‐B+H2O2‐pre‐treated plants showed cross‐tolerance to a subsequent 7‐day moderate drought treatment, which was assessed as the absence of negative impact on growth, leaf wilting, and leaf relative water content (RWC). Plant responses to the pre‐treatment were notably different: (1) H2O2 increased the activity of catalase (CAT, EC 1.11.1.6), phenylalanine ammonia lyase (PAL; EC 4.3.1.5) and peroxidase activities (POD, EC 1.11.1.7), and (2) the combined treatment induced epidermal flavonols which were key to drought tolerance. We report synergistic effects of UV‐B and H2O2 on transcription accumulation of UV RESISTANCE LOCUS 8, NAC DOMAIN PROTEIN 13 (NAC13), and BRI1‐EMS‐SUPPRESSOR 1 (BES1). Our data demonstrate a pre‐treatment‐dependent response to drought for NAC13, BES1 and CHALCONE SYNTHASE transcript accumulation. This study highlights the potential of combining UV‐B and H2O2 to improve drought tolerance which could become a useful tool to reduce water use.
Ämnesord
- NATURVETENSKAP -- Biologi -- Botanik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Botany (hsv//eng)
- NATURVETENSKAP -- Biologi -- Biokemi och molekylärbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Biochemistry and Molecular Biology (hsv//eng)
Nyckelord
- Ultraviolet-B radiation
- Hydrogen Peroxide
- Drought
- Cross-tolerance
- Antioxidant Enzymes
- Flavonoids
- Reactive Oxygen Species
- Nicotiana tabacum
- Biology
- Biologi
- Biokemi
- Biochemistry
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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