دورية أكاديمية
Frozen in the dark: interplay of night-time activity of xanthophyll cycle, xylem attributes, and desiccation tolerance in fern resistance to winter.
| العنوان: | Frozen in the dark: interplay of night-time activity of xanthophyll cycle, xylem attributes, and desiccation tolerance in fern resistance to winter. |
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| المؤلفون: | Fernández-Marín B; Department of Botany, Ecology and Plant Physiology, University of La Laguna (ULL), Tenerife 38200, Spain.; Department of Plant Biology and Ecology, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, 48940 Leioa, Spain., Arzac MI; Department of Plant Biology and Ecology, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, 48940 Leioa, Spain., López-Pozo M; Department of Plant Biology and Ecology, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, 48940 Leioa, Spain., Laza JM; Laboratory of Macromolecular Chemistry (Labquimac), Department of Physical Chemistry, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, 48940 Leioa, Spain., Roach T; Department of Botany and Centre for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Sternwartestrasse 15, 6020 Innsbruck, Austria., Stegner M; Department of Botany and Centre for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Sternwartestrasse 15, 6020 Innsbruck, Austria., Neuner G; Department of Botany and Centre for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Sternwartestrasse 15, 6020 Innsbruck, Austria., García-Plazaola JI; Department of Plant Biology and Ecology, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, 48940 Leioa, Spain. |
| المصدر: | Journal of experimental botany [J Exp Bot] 2021 Apr 02; Vol. 72 (8), pp. 3168-3184. |
| نوع المنشور: | Journal Article; Research Support, Non-U.S. Gov't |
| اللغة: | English |
| بيانات الدورية: | Publisher: Oxford University Press Country of Publication: England NLM ID: 9882906 Publication Model: Print Cited Medium: Internet ISSN: 1460-2431 (Electronic) Linking ISSN: 00220957 NLM ISO Abbreviation: J Exp Bot Subsets: MEDLINE |
| أسماء مطبوعة: | Original Publication: Oxford, UK : Oxford University Press, |
| مواضيع طبية MeSH: | Ferns*, Desiccation ; Ecosystem ; Freezing ; Xanthophylls ; Xylem |
| مستخلص: | While most ferns avoid freezing as they have a tropical distribution or shed their fronds, wintergreen species in temperate and boreoalpine ecosystems have to deal with sub-zero temperatures. Increasing evidence has revealed overlapping mechanisms of desiccation and freezing tolerance in angiosperms, but the physiological mechanisms behind freezing tolerance in ferns are far from clear. We evaluated photochemical and hydraulic parameters in five wintergreen fern species differing in their ability to tolerate desiccation. We assessed frond freezing tolerance, ice nucleation temperature and propagation pattern, and xylem anatomical traits. Dynamics of photochemical performance and xanthophyll cycle were evaluated during freeze-thaw events under controlled conditions and, in selected species, in the field. Only desiccation-tolerant species, which possessed a greater fraction of narrow tracheids (<18 μm) than sensitive species, tolerated freezing. Frond freezing occurred in the field at -3.4 ± 0.9 °C (SD) irrespective of freezing tolerance, freezable water content, or tracheid properties. Even in complete darkness, maximal photochemical efficiency of photosystem II was down-regulated concomitantly with zeaxanthin accumulation in response to freezing. This was reversible upon re-warming only in tolerant species. Our results suggest that adaptation for freezing tolerance is associated with desiccation tolerance through complementary xylem properties (which may prevent risk of irreversible cavitation) and effective photoprotection mechanisms. The latter includes de-epoxidation of xanthophylls in darkness, a process evidenced for the first time directly in the field. (© The Author(s) 2021. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For permissions, please email: journals.permissions@oup.com.) |
| التعليقات: | Comment in: J Exp Bot. 2021 Apr 2;72(8):2814-2817. (PMID: 33822176) |
| فهرسة مساهمة: | Keywords: Adiantum; Asplenium; Ceterach; Polypodium; cold; freezing; frost resistance; photoprotection; resurrection plant; violaxanthin de-epoxidase (VDE) |
| المشرفين على المادة: | 0 (Xanthophylls) |
| تواريخ الأحداث: | Date Created: 20210222 Date Completed: 20210521 Latest Revision: 20210521 |
| رمز التحديث: | 20221213 |
| DOI: | 10.1093/jxb/erab071 |
| PMID: | 33617637 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 1460-2431 |
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| DOI: | 10.1093/jxb/erab071 |