Portal de Periódicos da CAPES

Artigo Produção Nacional Revisado por pares

BIBTEX RIS

Effects of the interactions among macronutrients, plant age and photoperiod in the composition of Hyptis suaveolens (L.) Poit essential oil from Alfenas (MG), Brazil

2006; Wiley; Volume: 22; Issue: 2 Linguagem: Inglês

10.1002/ffj.1769

1099-1026

Felipe Terra Martins, Marcelo Henrique dos Santos, Marcelo Polo, Luiz C. A. Barbosa,

Plant and animal studies

Abstract This study was performed to verify the influence of photoperiod, plant age and nitrogen, phosphorus and potassium availability in the essential oil composition of Hyptis suaveolens (L.) Poit from Alfenas (MG), Brazil. The plants were grown in a greenhouse and six treatments were used. These treatments were harvested at two different periods (60 and 135 day‐old plants). The essential oil composition was determined by GC–MS analysis using a DB5 bonded phase column. The terpenes spathulenol (8.43–24.70%), globulol (6.89–14.55%), dehydroabietol (3.84–11.80%), α ‐cadinol (4.25–8.05%) and β ‐phellandrene (2.91–4.40%) were the major constituents found in the essential oil. Spathulenol amounts changed according to nitrogen and phosphorus availability, related to plant age. Oxygenated sesquiterpenes (33.09–49.55%) represented the main group of constituents in most of the treatments, while the amounts of oxygenated diterpenes (5.68–18.07%) increased in 135 day‐old plants. In addition, a pattern of terpenoid oxidation related to the plant age was suggested. The major changes in the essential oil composition were found in 60 day‐old plants grown under nitrogen and phosphorus deficiencies and extended photoperiod. In conclusion, the interaction among the tested macronutrients, photoperiod and plant age may be related to the essential oil composition of H. suaveolens from Alfenas, Brazil. Copyright © 2006 John Wiley & Sons, Ltd.