Divergent Photosynthetic Strategies of Lupinus polyphyllus and Helleborus viridis During Cold Acclimation and Freezing–Thaw Recovery
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Le résumé fourni par la source
Low temperatures can significantly affect the growth of ornamental plants, emphasizing the importance of improving their cold tolerance. However, comparative studies on the photosynthetic responses of sun and shade plants to low temperatures remain limited. In this study, gas exchange, chlorophyll fluorescence in Photosystem II (PSII) and Photosystem I (PSI), the antioxidant system, the osmoregulator substance, and lipid peroxidation were investigated in the shade plant Helleborus viridis (Hv) and the sun plant Lupinus polyphyllus (Lp) during cold acclimation (CA) and the freezing–thaw recovery (FTR). The CA treatment significantly declined the net photosynthetic rate (Pn) and the maximum photochemical efficiency of PSII (Fv/Fm) in Hv and Lp, indicating the photoinhibition occurred in both species. However, Hv exhibited a much better photosynthetic stability to maintain Pn, Fv/Fm, and carboxylation efficiency (CE) than Lp during CA, suggesting that Hv had a greater photosynthetic resilience compared to Lp. Furthermore, Hv preferred to maintain Pn, Fv/Fm, the actual photosynthetic efficiency of PSII (Y(II)), and the actual photosynthetic efficiency of PSI (Y(I)) to consistently provide the necessary energy for the carbon assimilation process, while Lp tended to divert and dissipate excess energy by thermal dissipation and cyclic electron flow during CA. Moreover, there were higher soluble sugar contents in Hv in comparison to Lp. These traits allowed Hv to recover photosynthetic efficiency and maintain cellular integrity better than Lp after the freezing stress. In conclusion, CA significantly reduced the photosynthetic capacity and led to the divergent photosynthetic strategies of both species, which finally resulted in a different freezing tolerance after the freezing–thaw recovery. These findings provide insights into the divergent photoprotective strategies of sun and shade plants in response to cold temperatures.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Divergent Photosynthetic Strategies of Lupinus polyphyllus and Helleborus viridis During Cold Acclimation and Freezing–Thaw Recovery
- Date Crossref
- 17/02/2025
- Éditeur
- MDPI AG
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Heilongjiang Provincial Academy of Agricultural Sciences pays non établi dans la noticeUniversité ou école supérieure
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Institute of Vegetables and Flowers pays non établi dans la noticeStructure de recherche
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Chinese Academy of Agricultural Sciences pays non établi dans la noticeOrganisme public
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Ministry of Agriculture and Rural Affairs pays non établi dans la noticeOrganisme public
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Institute of Grassland Research Northern Agriculture and Livestock Husbandry Technology Innovation Center pays non établi dans la noticeStructure de recherche
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Institute of Industrial Crops pays non établi dans la noticeStructure de recherche
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State Key Laboratory of Vegetable Biobreeding pays non établi dans la noticeStructure de recherche
Heilongjiang Provincial Academy of Agricultural Sciences, Institute of Vegetables and Flowers et Chinese Academy of Agricultural Sciences, avec 4 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.