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<p><i>Lippia alba</i> (Mill.) N.E.Br. ex Britton &amp; P. Wilson (Verbenaceae) is an aromatic shrub with medicinal importance. The species is considered an autopolyploid complex, being the main constituent of the essential oil associated with ploidal level. Triploids predominantly produce linalool, a valuable monoterpene. Synthetic polyploids of <i>L. alba</i> have been generated previously to explore the biosynthetic pathway of terpenes, but the physiological and metabolic aspects of those individuals were not investigated yet. Considering that polyploidy is also often linked to an increase in tolerance to extreme environmental conditions, here we evaluated both physiological and genetic responses of synthetic triploids to environmental stress such as salinity and water deficit. Enzymes related to the antioxidant system, the chemical composition of the essential oil, the DNA methylation profile, and the expression of genes related to essential oil production were analyzed. The results showed stability in these individuals under both stress conditions. Our data indicate a similarity between synthetic and natural triploids of <i>L. alba</i>. Additionally, the observed phenotypic plasticity in synthetic polyploids underscores their potential for further exploration, especially regarding their ability to adapt to environmental stress.</p>

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Phenotypic Plasticity in a Synthetic Triploid of Lippia alba (Mill.) N.E.Br. ex Britton & P. Wilson (Verbenaceae) Under Salinity and Drought Stresses

  • 期刊论文

  • 发表日期：

    2025年10月3日

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  • Moisés Henrique Almeida Gusmão,
  • Vívian Caiafa Ferreira Paiva,
  • Juliana Tatiara da Costa Siqueira,
  • Tatiane Dulcineia Silva,
  • Paulo Henrique Pereira Peixoto,
  • Richard Michael Grazul,
  • Wagner Campos Otoni,
  • Juliana Mainenti Leal Lopes,
  • Elyabe Monteiro de Matos,
  • Lyderson Facio Viccini

摘要

Lippia alba (Mill.) N.E.Br. ex Britton & P. Wilson (Verbenaceae) is an aromatic shrub with medicinal importance. The species is considered an autopolyploid complex, being the main constituent of the essential oil associated with ploidal level. Triploids predominantly produce linalool, a valuable monoterpene. Synthetic polyploids of L. alba have been generated previously to explore the biosynthetic pathway of terpenes, but the physiological and metabolic aspects of those individuals were not investigated yet. Considering that polyploidy is also often linked to an increase in tolerance to extreme environmental conditions, here we evaluated both physiological and genetic responses of synthetic triploids to environmental stress such as salinity and water deficit. Enzymes related to the antioxidant system, the chemical composition of the essential oil, the DNA methylation profile, and the expression of genes related to essential oil production were analyzed. The results showed stability in these individuals under both stress conditions. Our data indicate a similarity between synthetic and natural triploids of L. alba. Additionally, the observed phenotypic plasticity in synthetic polyploids underscores their potential for further exploration, especially regarding their ability to adapt to environmental stress.