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Downsizing in plant...
Downsizing in plants—UV light induces pronounced morphological changes in the absence of stress
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- Qian, Minjie, 1987- (author)
- Örebro Life Science Center, School of Science and Technology, Örebro University, Örebro, Sweden; College of Horticulture, Hainan University, Haikou, China,Biokemi
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- Rosenqvist, Eva, 1960- (author)
- Section of Crop Sciences, Department of Plant and Environmental Sciences, University of Copenhagen, Taastrup, Denmark
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- Prinsen, Els (author)
- Integrated Molecular Plant Physiology Research, Department of Biology, University of Antwerpen, Antwerpen, Belgium
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- Pescheck, Frauke, 1979- (author)
- Botanical Institute, Christian-Albrechts-University Kiel, Kiel, Germany
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- Flygare, Ann-Marie, 1964- (author)
- Örebro universitet,Handelshögskolan vid Örebro Universitet,Statistics Unit
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- Kalbina, Irina, 1961- (author)
- Örebro universitet,Institutionen för naturvetenskap och teknik,Örebro Life Science Cente,Biokemi
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- Jansen, Marcel A K, 1962- (author)
- School of Biological, Earth and Environmental Sciences, Environmental Research Institute, University College Cork, Cork, Ireland
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- Strid, Åke, Professor, 1960- (author)
- Örebro universitet,Institutionen för naturvetenskap och teknik,Örebro Life Science Center,Biokemi
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(creator_code:org_t)
- 2021-06-07
- 2021
- English.
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In: Plant Physiology. - : Oxford University Press. - 0032-0889 .- 1532-2548. ; 187:1, s. 378-395
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Abstract
Subject headings
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- Ultraviolet (UV) light induces a stocky phenotype in many plant species. In this study, we investigate this effect with regard to specific UV wavebands (UV-A or UV-B) and the cause for this dwarfing. UV-A- or UV-B-enrichment of growth light both resulted in a smaller cucumber (Cucumis sativus L.) phenotype, exhibiting decreased stem and petiole lengths and leaf area (LA). Effects were larger in plants grown in UV-B- than in UV-A-enriched light. In plants grown in UV-A-enriched light, decreases in stem and petiole lengths were similar independent of tissue age. In the presence of UV-B radiation, stems and petioles were progressively shorter the younger the tissue. Also, plants grown under UV-A-enriched light significantly reallocated photosynthates from shoot to root and also had thicker leaves with decreased specific LA. Our data therefore imply different morphological plant regulatory mechanisms under UV-A and UV-B radiation. There was no evidence of stress in the UV-exposed plants, neither in photosynthetic parameters, total chlorophyll content, or in accumulation of damaged DNA (cyclobutane pyrimidine dimers). The abscisic acid content of the plants also was consistent with non-stress conditions. Parameters such as total leaf antioxidant activity, leaf adaxial epidermal flavonol content and foliar total UV-absorbing pigment levels revealed successful UV acclimation of the plants. Thus, the UV-induced dwarfing, which displayed different phenotypes depending on UV wavelengths, occurred in healthy cucumber plants, implying a regulatory adjustment as part of the UV acclimation processes involving UV-A and/or UV-B photoreceptors.
Subject headings
- 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)
Keyword
- Biochemistry
- Biokemi
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Qian, Minjie, 19 ...
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Rosenqvist, Eva, ...
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Prinsen, Els
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Pescheck, Frauke ...
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Flygare, Ann-Mar ...
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Kalbina, Irina, ...
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show more...
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Jansen, Marcel A ...
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Strid, Åke, Prof ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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and Botany
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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and Biochemistry and ...
- Articles in the publication
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Plant Physiology
- By the university
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Örebro University