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- Title
Salinity modulates growth, morphology, and essential oil profile in Lippia alba L. (Verbenaceae) grown in vitro.
- Authors
de Castro, Kamila Motta; Batista, Diego Silva; Silva, Tatiane Dulcineia; Fortini, Evandro Alexandre; Felipe, Sérgio Heitor Sousa; Fernandes, Amanda Mendes; de Jesus Sousa, Raysa Mayara; de Queiroz Nascimento, Laís Stehling; Campos, Victória Rabelo; Viccini, Lyderson Facio; Grazul, Richard Michael; Otoni, Wagner Campos
- Abstract
Soil salinity is one of the most relevant abiotic factors affecting global crop productivity. It also influences the composition of secondary metabolites in medicinal plant species. Lippia alba has great economic and industrial potential, which thanks to its essential oils rich in bioactive compounds and is an important plant in South American popular medicine. The objective of this work was to evaluate the effect of salt stress on the anatomy and growth of L. alba plants cultured in vitro, as well as the profile of essential oils and the expression of genes related to their synthesis. To this end, nodal segments were cultured in MS medium with the addition of 0, 30, 60, or 90 mM NaCl. After 40 days, growth, essential oil composition, and the expression of genes involved in mono- and sesquiterpenes biosynthesis were assayed. We found that salt stress affected primary metabolism of L. alba, impairing growth, development, and physiological activities. Alterations in secondary metabolism included an increase in linalool and a reduction in eucalyptol levels in plants under more severe salt stress (60 mM). Thus, while high concentrations of NaCl may compromise the physiology of L. alba plants, plasticity of this species under moderate salt stress allows growth and development without damage to the biosynthesis of mono- and sesquiterpenes. Key Message: Moderate salt stress significantly alters the percentage of linalool and eucalyptol in plants of Lippia alba grown in vitro.
- Subjects
ESSENTIAL oils; LIPPIA (Genus); SALINITY; VERBENACEAE; METABOLITES; CHEMICAL composition of plants
- Publication
Plant Cell, Tissue & Organ Culture, 2020, Vol 140, Issue 3, p593
- ISSN
0167-6857
- Publication type
Article
- DOI
10.1007/s11240-019-01755-8