Resumo

RIVERA-JARAMILLO, Yoselin Athalia et al. PVA-Chitosan-nCu complex improves yield and defense response in tomato. Rev. Mex. Cienc. Agríc [online]. 2021, vol.12, n.6, pp.970-979.  Epub 21-Mar-2022. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v12i6.3012.

Currently the use of nanotechnology is revolutionizing agricultural production. Copper nanoparticles have been shown to influence the growth and development of different plant species, in addition to operating as stress resistance inducers. The objective of the present research was to evaluate the response in growth and yield, as well as the activation of the defense system of tomato plants. The treatments evaluated were a complex of polyvinyl alcohol-chitosan-copper nanoparticles (PVA-Cts-nCu), another complex of PVA-Cts and an absolute control (T0). The treatments were applied via foliar in tomato plants under greenhouse conditions. During the crop cycle, agronomic variables were determined, and the activity of enzymes related to stress tolerance such as β-1,3 glucanase, chitinase and phenylalanine ammonia lyase (PAL), as well as the expression of the PR1 gene. The PVA-Cts-nCu complex increased yield, number of fruits, average fruit weight, aerial fresh weight and root fresh weight, in addition, it promoted the defense system by increasing the PAL enzyme activity, as well as the overexpression of the PR1 gene.

Palavras-chave : biostimulant; gene expression; stress; vegetables.

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