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- Title
Nitrate reductase activity in the different phenophases of 'palmer' mango cultivated in the semiarid.
- Authors
da Silva Santos, Alana Juliete; de Paiva Neto, Vespasiano Borges; Sanches, Luciana Guimarães; de Almeida Carreiro, Daniel; Martins Pereira, Maria Poliana; Rezende Zuffo Borges, Monica Cristina; Rodrigues dos Santos, Stefany Emanuella; Lucena Cavalcante, Ítalo Herbert
- Abstract
Nitrate reductase is the enzyme that catalyzes the frst reduction reaction in the nitrate assimilation process, an important nitrogen (N) source. This element is one of the macronutrients required in greater amounts by mango (Mangifera indica L.), exerting a great infuence on the growth and development of the plants. In this context, this work aimed to evaluate nitrate reductase activity (NRa) throughout the day and characterize it in leaves of 1st and 2nd vegetative fushes and young roots of ‘Palmer’ mango cultivated in the Brazilian semiarid For each phenophase, leaves and roots were randomly collected from six plants in the orchard. A completely randomized design was employed, with four replications, and the NRa quantifcation was based on the in vivo evaluation method. The enzyme activity was maximum in the period of greatest solar radiation or from 10 a.m. to 11 a.m. The 2nd fush leaves and young the roots constitute the main nitrate assimilation sites in the mango crop in comparation with 1st fush leaves. Fertilization with nitrate or potassium sources in the different phenological phases beneft the NRa, which remains maximum during reproductive phase than vegetative phase.
- Publication
Journal of Applied Botany & Food Quality, 2021, Vol 94, p192
- ISSN
1613-9216
- Publication type
Article