Silicon in Pre-sprouted Sugarcane Seedlings Mitigates the Effects of Water Deficit After Transplanting
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ORIGINAL PAPER
Silicon in Pre-sprouted Sugarcane Seedlings Mitigates the Effects of Water Deficit After Transplanting Gelza Carliane Marques Teixeira 1 & Renato de Mello Prado 1 & Antonio Márcio Souza Rocha 2 & Luiz Cláudio Nascimento dos Santos 1 & Marcilene Machado dos Santos Sarah 1 & Priscila Lupino Gratão 3 & Carolina Fernandes 4 Received: 2 October 2019 / Accepted: 18 December 2019 # Sociedad Chilena de la Ciencia del Suelo 2020
Abstract This study is aimed at assessing whether silicon (Si) can mitigate the effects caused by water stress in pre-sprouted seedlings (PSS) in sugarcane after their transplanting in the soil and what is the best form in the application if via nutrient solution or leaf spraying. The treatments were arranged in a 3 × 3 factorial scheme with silicon supply via nutrient solution (2 mmol L−1), Si via leaf application (3.4 mmol L−1), and without Si (control) and three levels of soil water retention capacity (70%, 50%, and 30%), for 30 days. In the absence of Si, the water deficit was damaging to the physiological, growth, and dry matter production variables of plants, in a 30% level of soil water retention capacity. Silicon supply via nutrient solution was more efficient when compared with Si via leaf spraying in the formation of pre-sprouted sugarcane seedlings in the first 30 days after transplanting, since it increased the quantum efficiency of photosystem II, chlorophyll content, leaf water potential, and water content, decreased cell electrolyte leakage and free proline content, and allowed a higher growth and biomass production. In conclusion, the supply of Si via nutrient solution in pre-sprouted sugarcane seedlings can be considered a feasible alternative to alleviate water deficit damage imposed after transplanting, in a 30% level of soil water retention capacity. Keywords Plant nutrition . Beneficial element . Abiotic stress . Leaf spraying . Polymerization . Saccharum officinarum L
Highlights - Silicon application and soil available water level interaction were evaluated. - The severe and moderate water deficit decreased by 47 and 21% of plant weight. - Silicon showed beneficial for sugarcane in water deficit conditions. - Silicon supplied via nutrient solution mitigate the damages caused by water deficit. * Gelza Carliane Marques Teixeira [email protected] Renato de Mello Prado [email protected]
Carolina Fernandes [email protected] 1
Antonio Márcio Souza Rocha [email protected]
Laboratory of Plant Nutrition, Department of Soils and Fertilizers, São Paulo State University (UNESP), Via de Acesso Prof. Paulo Donato Castellane, s/n, Jaboticabal, São Paulo 14884900, Brazil
2
Luiz Cláudio Nascimento dos Santos [email protected]
Laboratory of Biogeochemistry, Department of Technology, São Paulo State University (UNESP), Jaboticabal, São Paulo, Brazil
3
Laboratory of Plant Physiology, Department of Biology Applied to Agriculture, São Paulo State University (UNESP), Jaboticabal, São Paulo, Brazil
4
Laboratory of Soil Physics, Departmen
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