Delineamento e Implementação do Itinerário Técnico de Biofortificação em Cálcio nos tubérculos de Solanum tuberosum L. das variedades Agria, Picasso e Rossi

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Mineral Monitorization in Different Tissues of Solanum tuberosum L. during Calcium Biofortification Process

Publication . Coelho, Ana Rita F.; Lidon, Fernando C.; Pessoa, Cláudia Campos; Daccak, Diana; Luís, Inês Carmo; Marques, Ana Coelho; Ramalho, José C.

Calcium is one of the 16 essential elements for plants, being required as Ca2+ and being involved in several fundamental processes (namely, in the stability and integrity of the cell wall, the development of plant tissue, cell division, and in stress responses). Moreover, Ca plays an important role in potato production. In this context, this study aimed to monitor the culture development (in situ and using an unmanned aerial vehicle (UAV)) and the mineral content of four essential elements (Ca, P, K, and S) in different organs of Solanum tuberosum L. (roots, stems, leaves, and tubers) during a calcium biofortification process, carried out with two types of solutions (CaCl2 and Ca- EDTA) with two concentrations (12 and 24 kg ha􀀀1). The calcium content generally increased in the S. tuberosum L. organs of both varieties and showed, after the last foliar application, an increase in Ca content that varied between 5.7–95.6% and 20.7–33%, for the Picasso and Agria varieties, respectively. The patterns of accumulation in both varieties during the biofortification process were different between the variety and mineral element. Regarding the quality analysis carried out during the development of the tubers, only the Agria variety was suitable for industrial processing after the last foliar application

2022Journal article

Open access

Foliar Spraying of Solanum tuberosum L. with CaCl2 and Ca(NO3)2: Interactions with Nutrients Accumulation in Tubers

Publication . Coelho, Ana Rita F.; Ramalho, José C.; Lidon, Fernando Cebola; Marques, Ana Coelho; Daccak, Diana; Pessoa, Cláudia Campos; Luís, Inês Carmo; Guerra, Mauro; Leitão, Roberta G.; Semedo, José Manuel N.; Silva, Maria Manuela; Pais, Isabel P.; Leal, Nuno; Galhano, Carlos; Rodrigues, Ana Paula

Calcium is essential for plants, yet as its mobility is limited, the understanding of the rate of Ca2+ accumulation and deposition in tissues of tubers, as well as the interactions with other critical nutrients prompted this study. To assess the interactions and differential accumulation of micro and macronutrients in the tissues of tubers, Solanum tuberosum L. varieties Agria and Rossi were cultivated and, after the beginning of tuberization, four foliar sprayings (at 8–10 day intervals) with CaCl2 (3 and 6 kg ha􀀀1) or Ca(NO3)2 (2 and 4 kg ha􀀀1) solutions were performed. It was found that both fertilizers increased Ca accumulation in tubers (mostly in the parenchyma tissues located in the center of the equatorial region). The functioning of the photosynthetic apparatus was not affected until the 3rd application but was somewhat affected when approaching the end of the crop cycle (after the 4th application), although the lower dose of CaCl2 seemed to improve the photochemical use of energy, particularly when compared with the greater dose of Ca(NO3)2. Still, none of these impacts modified tuber height and diameter. Following the increased accumulation of Ca, in the tubers of both varieties, the mean contents of P, K, Na, Fe, and Zn revealed different accumulation patterns. Moreover, accumulation of K, Fe, Mn, and Zn prevailed in the epidermis, displaying a contrasting pattern relative to Ca. Therefore, Ca accumulation revealed a heterogeneous trend in the different regions analyzed, and Ca enrichment of tubers altered the accumulation of other nutrients

2022Journal article

Open access