Repositorio
Institucional

Benavides-Mendoza, Adalberto

Alberto Garza-Alonso, Carlos

Juarez-Maldonado, Antonio

Gonzalez-Morales, Susana

Cabrera-De la Fuente, Marcelino

Cadenas-Pliego, Gregorio

Berenice Morales-Diaz, America

Trejo-Tellez, Libia Iris

Tortella, Gonzalo

ZnO nanoparticles as potential fertilizer and biostimulant for lettuce

CELL PRESS

HELIYON

en

Zn is an indispensable nutrient for crops that usually presents low bioavailability. Different techniques have been proposed to improve the bioavailability of Zn, including the use of nano -fertilizers. The objective of the study was to evaluate the applications of drench (D) and foliar (F) ZnO nanoparticles (NZnO) compared to those of ionic Zn2+ (ZnSO4) in lettuce. The plants cv. Great Lakes 407 was produced in pots of 4 L with perlite-peat moss (1:1) under greenhouse conditions. The treatments consisted of NZnO applications that replaced the total Zn provided with a Steiner solution, as follows: Zn2+ (100%D) (control), Zn2+ (50%D+50%F), NZnO (100% D), NZnO (50%D+50%F), NZnO (75%D), NZnO (50%D), NZnO (75%F) and NZnO (50%F). Four applications of Zn were made with a frequency of 15 days. 75 days after transplant (DAP), the fresh and dry biomass, chlorophyll a, b, and beta-carotene, phenolics, flavonoids, antioxidant ca-pacity, vitamin C, glutathione, H2O2, total protein, and enzymatic activity of PAL, CAT, APX, and GPX were evaluated. The mineral concentrations (N, P, K, Ca, Mg, S, Cu, Fe, Mn, Mo, Zn, Ni, and Si) in the leaves and roots of plants were also determined. The results showed that, compared to Zn2+, NZnO promoted increases in biomass (14-52%), chlorophylls (32-69%), and antioxidant compounds such as phenolics, flavonoids, and vitamin C. The activity of enzymes like CAT and APX, as well as the foliar concentration of Ca, Mg, S, Fe, Mn, Zn, and Si increased with NZnO. A better response was found in the plants for most variables with foliar applications of NZnO equivalent to 50-75% of the total Zn2+ applied conventionally. These results demonstrate that total replacement of Zn2+ with NZnO is possible, promoting fertilizer efficiency and the nutra-ceutical quality of lettuce.

2023

artículo original

10.1016/j.heliyon.2022.e12787

PDF

Antioxidants

Plant nutrition

Plant physiology

Zinc

Protected agriculture

Nanofertilizers

Nanometal

Nanotechnology

Ciencia y tecnología: otros temas

Antioxidantes

Nutrición vegetal

Fisiología de las plantas

Zinc

Agricultura protegida

Nanofertilizantes

Nanometal

Nanotecnología

artículo original

versión publicada

CC BY 4.0

CC BY 4.0

acceso abierto

acceso abierto

WOS:000965938000001

verde# dorado

Ciencia y tecnología: otros temas