Czech J. Genet. Plant Breed., 2025, 61(1):43-49 | DOI: 10.17221/107/2024-CJGPB

The insertion of an ancestral gene in Nicotiana tabacum plants reduces free radicals during saline irrigationOriginal Paper

Claudia Marissa Calderón Torres1*, Victoria Abril Mancilla Galván1, Miguel Murguía Romero2
1 Unidad de Biomedicina, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Tlalnepantla, Estado de México, México
2 Unidad de Informática para la Biodiversidad, Instituto de Biología, Universidad Nacional Autónoma de México, Coyoacán, Ciudad de México, México

Transgenic organisms modified with ancestral genes for nitrogen metabolism are rare. Previously, it was reported that genetically modified Nicotiana tabacum with the ARO4 gene of aromatic amino acid synthesis from the yeast Debaryomyces hansenii increases its growth during moderate salt stress. In this investigation, it was explored if the changes in the expression of the gene DhARO4 in Nicotiana tabacum, during saline irrigation, are related to the chlorophyll content and the total reactive oxygen species production. Seedlings of transgenic and wild type Nicotiana tabacum germinated in standard conditions were divided into two irrigation groups, with 100 mM of NaCl and with tap water; and, after 50 days, in the non-senescent adult leaves of the plants, the total chlorophyll a and b and the total chlorophyll content were determined by spectrophotometry and the reactive oxygen species production (•OH, 1O2, H2O2) was quantified by a 2',7'-dichlorodihydrofluorescein assay. The expression of the DhARO4 gene was verified with a salt shock of 100 mM of NaCl for 24 hours in the transgenic and wild type plants in the tap water irrigation group. The DhARO4 gene transcript increased (P < 0.05) in the transgenic plant; meanwhile, the average concentration of chlorophyll a increased (P < 0.05), and the average production of reactive oxygen species decreased (P < 0.05).

Keywords: gene DhARO4; gene expression; genetically modified organisms; salt stress; tobacco plant

Received: September 4, 2024; Revised: November 29, 2024; Accepted: December 3, 2024; Prepublished online: December 19, 2024; Published: January 14, 2025  Show citation

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Calderón Torres CM, Mancilla Galván VA, Murguía Romero M. The insertion of an ancestral gene in Nicotiana tabacum plants reduces free radicals during saline irrigation. Czech J. Genet. Plant Breed. 2025;61(1):43-49. doi: 10.17221/107/2024-CJGPB.
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