How does shading mitigates the water deficit in young Hymenaea courbaril L. plants?
| Autor: | Reis LC; Plant Metabolism and Nutrition Laboratory, Faculty of Agricultural Sciences, Federal University of Grande Dourados, Dourados, State Mato Grosso do Sul, Brazil., Scalon SPQ; Plant Metabolism and Nutrition Laboratory, Faculty of Agricultural Sciences, Federal University of Grande Dourados, Dourados, State Mato Grosso do Sul, Brazil., Foresti AC; Plant Metabolism and Nutrition Laboratory, Faculty of Agricultural Sciences, Federal University of Grande Dourados, Dourados, State Mato Grosso do Sul, Brazil., Dresch DM; Plant Metabolism and Nutrition Laboratory, Faculty of Agricultural Sciences, Federal University of Grande Dourados, Dourados, State Mato Grosso do Sul, Brazil., Santos CC; Plant Metabolism and Nutrition Laboratory, Faculty of Agricultural Sciences, Federal University of Grande Dourados, Dourados, State Mato Grosso do Sul, Brazil., Lima VT; Departament of Botany, Biosciences Institute, São Paulo State University Júlio de Mesquita Filho, Rio Claro, São Paulo, Brazil. |
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| Jazyk: | angličtina |
| Zdroj: | Frontiers in plant science [Front Plant Sci] 2023 Sep 19; Vol. 14, pp. 1235234. Date of Electronic Publication: 2023 Sep 19 (Print Publication: 2023). |
| DOI: | 10.3389/fpls.2023.1235234 |
| Abstrakt: | Information on tolerance to isolated or combined abiotic stresses is still scarce for tree species, although such stresses are normal in nature. The interactive effect of light availability and water stress has been reported for some native tree species in Brazil but has not been widely investigated. To test the hypothesis that shading can mitigate the stressful effect of water deficit on the photosynthetic and antioxidant metabolism and on the growth of young Hymenaea courbaril L. plants, we evaluated the following two water regimes: a) continuous irrigation - control (I) - 75% field capacity. and b) water deficit (S), characterized by irrigation suspension associated the two following periods of evaluation: P0 - when the photosynthetic rate of plants subjected to irrigation suspension reached values close to zero, with the seedlings being re-irrigated at that moment, and REC - when the photosynthetic rate of the re-irrigated plants of each shading levels reached values similar to those of plants in the control treatment, totaling four treatments: IP0, SP0, IREC, and SREC. The plants of these four treatments were cultivated under the four following shading levels: 0, 30, 50, and 70%, constituting 16 treatments. Intermediate shading of 30 and 50% mitigates the water deficit and accelerates the recovery of H. courbaril . Water deficit associated with cultivation without shading (0%) should not be adopted in the cultivation or transplantation of H. courbaril . After the resumption of irrigation in the REC, the other characteristics presented a recovery under all cultivation conditions. Key message: Intermediate shading of 30 and 50% mitigates the water deficit and accelerates the recovery of H. courbaril . Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. (Copyright © 2023 Reis, Scalon, Foresti, Dresch, Santos and Lima.) |
| Databáze: | MEDLINE |
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