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Antioxidant and dro...
Antioxidant and drought‑acclimation responses in UV‑B‑exposed transgenic Nicotiana tabacum displaying constitutive overproduction of H2O2
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- Saénz-de la O, Diana (författare)
- School of Engineering, National Technological Institute of Mexico-Campus Roque, Guanajuato, México
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- Morales, Luis Orlando, 1974- (författare)
- Örebro universitet,Institutionen för naturvetenskap och teknik,Biokemi/Biologi
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- Strid, Åke, Professor, 1960- (författare)
- Örebro universitet,Institutionen för naturvetenskap och teknik,Biokemi
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- Feregrino-Perez, A. Angélica (författare)
- Basic and Applied Bioengineering Group, School of Engineering, Autonomous University of Querétaro-Campus Amazcala, Querétaro, México
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- Torres-Pacheco, Ireno (författare)
- Center for Applied Research in Biosystems (CARB-CIAB), School of Engineering, Autonomous University of Querétaro-Campus Amazcala, Querétaro, Mexico
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- Guevara‑González, Ramón G. (författare)
- Center for Applied Research in Biosystems (CARB-CIAB), School of Engineering, Autonomous University of Querétaro-Campus Amazcala, Querétaro, Mexico
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(creator_code:org_t)
- Springer, 2023
- 2023
- Engelska.
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Ingår i: Photochemical and Photobiological Sciences. - : Springer. - 1474-905X .- 1474-9092. ; 22:10, s. 2373-2387
- Relaterad länk:
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https://oru.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Hydrogen peroxide (H2O2) is an important molecule that regulates antioxidant responses that are crucial for plant stress resistance. Exposure to low levels of ultraviolet-B radiation (UV-B, 280–315 nm) can also activate antioxidant defenses and acclimation responses. However, how H2O2 and UV-B interact to promote stress acclimation remains poorly understood. In this work, a transgenic model of Nicotiana tabacum cv Xanthi nc, with elevated Mn-superoxide dismutase (Mn-SOD)activity, was used to study the interaction between the constitutive overproduction of H2O2 and a 14-day UV-B treatment (1.75 kJ m−2 d−1 biologically effective UV-B). Subsequently, these plants were subjected to a 7-day moderate drought treatment to evaluate the impact on drought resistance of H2O2- and UV-dependent stimulation of the plants' antioxidant system. The UV-B treatment enhanced H2O2 levels and altered the antioxidant status by increasing the epidermal flavonol index, Trolox Equivalent Antioxidant Capacity, and catalase, peroxidase and phenylalanine ammonia lyase activities in the leaves. UV-B also retarded growth and suppressed acclimation responses in highly H2O2-overproducing transgenic plants. Plants not exposed to UV-B had a higher drought resistance in the form of higher relative water content of leaves. Our data associate the interaction between Mn-SOD transgene overexpression and the UV-B treatment with a stress response. Finally, we propose a hormetic biphasic drought resistance response curve as a function of leaf H2O2 content in N. tabacum cv Xanthi.
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)
- LANTBRUKSVETENSKAPER -- Bioteknologi med applikationer på växter och djur -- Växtbioteknologi (hsv//swe)
- AGRICULTURAL SCIENCES -- Agricultural Biotechnology -- Plant Biotechnology (hsv//eng)
Nyckelord
- Drought
- Hormesis
- Hydrogen peroxide
- Mn-SOD
- Ultraviolet-B
- Biochemistry
- Biokemi
- Biology
- Biologi
- Molecular Biology
- Molekylärbiologi
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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