Autor(es):
Luís, Inês Carmo ; Lidon, Fernando C. ; Pessoa, Cláudia Campos ; Marques, Ana Coelho ; Coelho, Ana Rita F. ; Simões, Manuela ; Patanita, Manuel ; Dôres, José ; Ramalho, José C. ; Silva, Maria Manuela ; Almeida, Ana Sofia ; Pais, Isabel P. ; Pessoa, Maria Fernanda ; Reboredo, Fernando Henrique ; Legoinha, Paulo ; Guerra, Mauro ; Leitão, Roberta G. ; Campos, Paula Scotti
Data: 2021
Identificador Persistente: http://hdl.handle.net/10362/115781
Origem: Repositório Institucional da UNL
Assunto(s): Agronomic biofortification; Bread wheat; Grain yield; Zinc foliar application; Zinc grain content; Ecology, Evolution, Behavior and Systematics; Ecology; Plant Science; SDG 2 - Zero Hunger
Descrição
grant number 101-030835 UID/FIS/04559/2020
This study aimed to assess the implications of Zn enrichment in wheat grains as a function of contrasting genotypes, edaphic conditions and foliar fertilizers. Triticum aestivum L. varieties Roxo and Paiva were grown in four production fields, and sprayed with ZnSO4 (0, 16.20 and 36.40 kg/ha) Zn-EDTA (0, 6.30 and 12.60 kg/ha) and Tecnifol Zinc (0, 3.90 and 7.80 kg/ha). The heterogeneous edaphic conditions of the wheat fields were chemically characterized, it being found that soil properties determine different Zn accumulation in the grains of both genotypes. Foliar spraying enhanced to different extents Zn content in the grains of both genotypes, but the average of enrichment indexes varied among the wheat fields. Zinc mostly accumulated in the embryo and vascular bundle and to a lesser extent in the endosperm. Grain yield and test weight sprayed by ZnSO4 gave the highest values in both genotypes, but the opposite was found for Zn-EDTA. Considering the color parameters, lightness and red–green transitions were found to be a conjunction of genotype characteristics, fertilization types and edaphic conditions prevailing in each field. It is concluded that the index of Zn enrichment in wheat grains is a docket of edaphic conditions, genotype and type of fertilization.
