Downsizing in plants—UV light induces pronounced morphological changes in the absence of stress
| Autor: | Åke Strid, Els Prinsen, Ann Marie Flygare, Irina Kalbina, Frauke Pescheck, Marcel A. K. Jansen, Eva Rosenqvist, Minjie Qian |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
0301 basic medicine Ultraviolet Rays Physiology Plant Science medicine.disease_cause 01 natural sciences Stress (mechanics) 03 medical and health sciences Stress Physiological Genetics medicine Biology Research Articles Chemistry fungi Botany Biochemistry and Molecular Biology food and beverages Botanik Phenotype 030104 developmental biology Plant species Biophysics Cucumis sativus Ultraviolet Biokemi och molekylärbiologi 010606 plant biology & botany |
| Zdroj: | Plant Physiol Qian, M, Rosenqvist, E, Prinsen, E, Pescheck, F, Flygare, A M, Kalbina, I, Jansen, M A K & Strid, A 2021, ' Downsizing in plants—UV light induces pronounced morphological changes in the absence of stress ', Plant Physiology, vol. 187, no. 1, pp. 378-395 . https://doi.org/10.1093/plphys/kiab262 Plant physiology |
| ISSN: | 0032-0889 |
| Popis: | 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. Funding agencies:Science Foundation Ireland (S16/IA/4418)Flemish Science Foundation (FWO, grant G000515N)China Scholarship Council (CSC no. 201406320076) |
| Databáze: | OpenAIRE |
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