Autor(es):
Coelho, Ana Rita F. ; Ramalho, José Cochicho ; 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 ; Legoinha, Paulo ; Silva, Maria José ; Simões, Maria M. ; Campos, Paula Scotti ; Pessoa, Maria Fernanda ; Reboredo, Fernando Henrique
Data: 2022
Identificador Persistente: http://hdl.handle.net/10362/143379
Origem: Repositório Institucional da UNL
Projeto/bolsa:
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F04035%2F2020/PT;
info:eu-repo/grantAgreement/FCT/OE/UI%2FBD%2F150806%2F2020/PT;
Assunto(s): accumulation of nutrients; calcium; photosynthesis; potato biofortification; Solanum tuberosum L; Ecology, Evolution, Behavior and Systematics; Ecology; Plant Science; SDG 2 - Zero Hunger
Descrição
Publisher Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
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.
