Synthesis of calcium borate nanoparticles and its use as a potential foliar fertilizer in lettuce (Lactuca sativa) and zucchini (Cucurbita pepo)

Meier, Sebastian; Moore, Francisca; Morales, Arturo; Gonzalez, Maria-Eugenia; Seguel, Alex; Merino-Gergichevich, Cristian; Rubilar, Olga; Cumming, Jonathan; Aponte, Humberto; Alarcon, David; Mejias, Jaime

Abstract

This study was carried out to evaluate the effects of foliar sprays containing boron (B) nano-fertilizer (NF) on the growth and physiology of lettuce (Lactuca sativa) and zucchini (Cucurbita pepo). Plants were grown under greenhouse conditions for 60 days on a modified Hoagland solution with the presence and absence of boron ( + B or -B). A synthesized B-NF foliar spray and a commercial B foliar fertilizer (Bortrac (TM) 150, BT) was applied at a concentration of 30 mg B L-1 at 10-d intervals throughout the experiment. The B-NF treatment increased the growth of lettuce 2.7- and 1.9-fold for shoots and roots, respectively, with an average production of lettuce biomass by similar to 58%. Similarly, the NF increased the growth of zucchini by 18 and 66% compared with Control-B (the absence of B), and 13 and 36% compared with BT, both for shoots and roots, respectively. Nevertheless, NF + B mostly decreased lettuce growth with symptoms of B toxicity in leaves. In lettuce, addition of B did not affect concentrations of phenols; however, in zucchini, Control-B induced a higher production of phenolic compounds possibly related to B deficiency. The B addition in lettuce reduced the DPPH activity by 32 and 21% in NF and BT, respectively, compared to Control-B. These responses were similar in zucchini; however, the effect of B was product of its presence in mineral solution rather than due the foliar product applied. This suggests that a NF-based delivery system for B may be highly effective at boosting plant productivity on B-limited soils.

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Título según WOS: ID WOS:000531096600065 Not found in local WOS DB
Título de la Revista: PLANT PHYSIOLOGY AND BIOCHEMISTRY
Volumen: 151
Editorial: ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
Fecha de publicación: 2020
Página de inicio: 673
Página final: 680
DOI:

10.1016/j.plaphy.2020.04.025

Notas: ISI