Growth and essential oil content of accessions of Lippia rotundifolia in Minas Gerais, Brazil

Messulan Rodrigues Meira,Julio Cesar Rodrigues Lopes Silva,Brayonn Mascarenhas Azevedo,Ernane Ronie Martins

doi:10.1590/s1678-3921.pab2021.v56.02406

Abstract

Abstract The objective of this work was to evaluate the growth and essential oil content after transplantation and cutting of Lippia rotundifolia accessions from a natural population from the state of Minas Gerais, Brazil. Eight accessions were evaluated (PVP, GIG, RPE, ODA, JFE, PRP, SGS, and RTI) in six periods (60, 81, 102, 123, 144, and 165 days after transplanting and cutting), in a completely randomized experimental design. The following parameters were assessed: average width and length of the basal, median, and apical pair of leaves; plant height; stem diameter; and number of leaves. At 165 days, the yield of essential oil and the fresh and dry phytomass of the aerial part were also evaluated. Sixty days after the last evaluation, regrowth was measured from height, stem diameter, and number of leaves. The JFE accession stands out for emission of leaves, with a better development at 165 days after transplanting. RPE and PRP respond well to regrowth at 102 and 123 days after cutting, respectively. The SGS accession shows a high essential oil yield of 2.2%, and PVP, a low yield of 0.3%.

Highlights

Lippia rotundifolia Cham., popularly known as rosemary, is a shrub species from the Verbenaceae family, with a height of 0.5 to 2.0 m, native to the Brazilian Cerrado and endemic to the rock fields of the Cadeia do Espinhaço mountain chain (Sousa et al, 2013)
Sixty days after the last evaluation, regrowth was measured from height, stem diameter, and number of leaves
The experiment was conducted from June 2015 to May 2016 at Instituto de Ciências Agrárias of Universidade Federal de Minas Gerais (ICA/UFMG), in the municipality of Montes Claros, in the state of

Summary

Introduction

Lippia rotundifolia Cham., popularly known as rosemary, is a shrub species from the Verbenaceae family, with a height of 0.5 to 2.0 m, native to the Brazilian Cerrado and endemic to the rock fields of the Cadeia do Espinhaço mountain chain (Sousa et al, 2013). Concentrated in its leaves and flowers, the essential oils of this species are chemically composed of myrcene, limonene, linalool, and caryophyllene (Meira et al, 2019a). The concentration of these active principles in oil extracts confirms the medicinal properties of the plant, which has antimicrobial action against the Escherichia coli and Staphylococcus aureus enterobacteria (Souza et al, 2015). The species has potential for applications in traditional medicine, as well as in phytotherapy, aromatherapy, and the food market (Azevedo et al, 2017; Costa et al, 2017)

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Conclusion