Silicon mitigates iron deficiency in two energy cane cultivars by modulating physiological and nutritional mechanisms.
| Autor: | Teixeira GCM; Laboratory of Plant Nutrition, Department of Agricultural Sciences, São Paulo State University (UNESP), Jaboticabal, São Paulo, Brazil., Prado RM; Laboratory of Plant Nutrition, Department of Agricultural Sciences, São Paulo State University (UNESP), Jaboticabal, São Paulo, Brazil., Rocha AMS; Laboratory of Biogeochemistry, Department of Technology, São Paulo State University (UNESP), Jaboticabal, São Paulo, Brazil., Princi MB; Laboratory of Plant Nutrition, Department of Agricultural Sciences, São Paulo State University (UNESP), Jaboticabal, São Paulo, Brazil., de Andrade CS; Laboratory of Plant Nutrition, Department of Agricultural Sciences, São Paulo State University (UNESP), Jaboticabal, São Paulo, Brazil. |
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| Jazyk: | angličtina |
| Zdroj: | Frontiers in plant science [Front Plant Sci] 2023 May 31; Vol. 14, pp. 1204836. Date of Electronic Publication: 2023 May 31 (Print Publication: 2023). |
| DOI: | 10.3389/fpls.2023.1204836 |
| Abstrakt: | Introduction: Alkaline soils with iron (Fe) deficiency are found in many regions of the world, and the use of silicon (Si) can mitigate the damages caused by such deficiency. The aim of this study was to evaluate the effect of Si in mitigating a moderate deficiency of Fe in two energy cane cultivars. Methods: Two experiments were performed, one with the VX2 cultivar and the other with the VX3 cultivar of energy cane, which were cultivated in pots with sand and a nutrient solution. In both experiments, treatments followed a factorial scheme 2x2, designed based on the sufficiency and deficiency of Fe, being combined with the absence or presence of Si (2.5 mmol L -1 ), disposed in a randomized blocks design with six replicates. In the condition of Fe sufficiency, plants were cultivated in a solution containing 368 µmol L -1 of Fe, while plants cultivated under deficiency were initially submitted to cultivation with a 54 µmol L -1 concentration of Fe for 30 days, and later, with Fe complete omission for 60 days. The supply of Si was carried out by applying 15 fertirrigations with Si (via root and leaf) during the initial stage of seedling development, and after transplanting, the nutrient solution was added daily (via root). Results and Discussion: Both cultivars of energy cane were sensitive to Fe deficiency in the absence of Si, impairing its growth by causing stress and pigment degradation, thus reducing the photosynthesis efficiency. The supply of Si mitigated the damages caused by Fe deficiency in both cultivars, by increasing Fe accumulation in new and intermediate leaves, stem, and roots in the VX2 cultivar, and in new, intermediate, and old leaves and stem in the VX3 cultivar, which in turn reduced stress and favored both the nutritional and photosynthesis efficiency, while increasing the dry matter production. Si by modulating physiological and nutritional mechanisms, mitigates Fe deficiency in two energy cane cultivars. It was concluded that Si can be used as a strategy to improve growth and nutrition of energy cane in environments that are susceptible to Fe deficiency. 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 Teixeira, Prado, Rocha, Princi and Andrade.) |
| Databáze: | MEDLINE |
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