Effect of drought stress on some morphological characteristics, quantity and quality of essential oil in Rosemary (Rosmarinus officinalis L.)

A relevant improvement of the cultivar conditions of Rosmarinus officinalis L. in desert areas was achieved by a specific combination between an irrigation system and soil conditioner. A drastic reduction in water employment was obtained without affecting the quality of the plants, which was determined by monitoring the growth parameters and essential oil characteristics. In particular, the effect of surface and subsurface drip irrigation systems and different soil conditioners on the growth parameters, yield, and essential oil constituents of rosemary plants was assessed. Field experiments at the Agricultural Research Station (Al-Adlya farm), SEKEM Group Company, El-Sharkiya Governorate, Egypt, conducted over the two seasons, revealed the effectiveness of subsurface irrigation systems in obtaining better performances, especially in terms of saving water. The combination of subsurface irrigation and the conditioner HUNDZ soil with bentonite showed the maximum mean values of growth characteristics compared with other soil amendments during both seasons. The possibility to employ a water-saving irrigation system at the subsurface level without any drawback in the resulting plants was also explored in terms of molecular composition. Gas chromatography-mass (GC-MS) analysis of the essential oils extracted from plants grown under different irrigation conditions revealed a comparable composition in both cases. The quality of the system that showed the best performance was also confirmed by the comparable yield of the essential oil.

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Extraction of Essential Oils of Rosmarinus officinalis L. by Two Different Methods: Hydrodistillation and Microwave Assisted Hydrodistillation

The Scientific World JOURNAL ◽

10.1155/2019/3659432 ◽

2019 ◽

Vol 2019 ◽

pp. 1-6 ◽

Cited By ~ 11

Author(s):

Majda Elyemni ◽

Bouchra Louaste ◽

Imane Nechad ◽

Taha Elkamli ◽

Abdelhak Bouia ◽

...

Keyword(s):

Chemical Composition ◽

Essential Oil ◽

Essential Oils ◽

Steam Distillation ◽

Azeotropic Distillation ◽

Rosmarinus Officinalis ◽

Extraction Time ◽

Microwave Assisted ◽

Rosmarinus Officinalis L

The extraction of essential oils is generally carried out by two main techniques: azeotropic distillation (hydrodistillation, hydrodiffusion, and steam distillation) and extraction with solvents. However, these traditional methods are a bit expensive, especially since they are extremely energy and solvent consuming. This work consists in studying two methods of extraction of the essential oils of Rosmarinus officinalis L.: microwave assisted hydrodistillation (MAH) and Clevenger hydrodistillation (CH). Several parameters have been studied: the extraction time, the yield, and the chemical composition of the essential oils as well as the efficiency and cost of each procedure. The results obtained revealed that microwave-assisted hydrodistillation makes it possible to minimize the extraction time of the essential oils in comparison with conventional hydrodistillation. Thus, the same yield of essential oils is obtained for 20 minutes only with MAH while it takes 180 minutes with CH. In addition, the quality of the essential oil is improved thanks to a 1.14% increase in oxygenates. In conclusion, the MAH method offers significant advantages over conventional hydrodistillation and can therefore replace it on a pilot and industrial scale.

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MICROBIOLOGICAL AND PHYSICOCHEMICAL QUALITY OF FOUR CULTIVARS OF DATES IN THE REGION OF BECHAR, SOUTH-WEST OF ALGERIA - OPTIMIZATION OF CONSERVATION BY ROSMARINUS OFFICINALIS L. ESSENTIAL OIL

Acta Horticulturae ◽

10.17660/actahortic.2013.994.24 ◽

2013 ◽

pp. 247-255

Author(s):

A. Makhloufi ◽

A. Moussaoui ◽

L. Benlarbi ◽

Z. Hibi ◽

S. Ben Nabri ◽

...

Keyword(s):

Essential Oil ◽

Rosmarinus Officinalis ◽

Physicochemical Quality ◽

South West ◽

Rosmarinus Officinalis L

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The Impact of Drying Methods on Product Quality of Rosmarinus officinalis L.

ISPEC Journal of Agricultural Sciences ◽

10.46291/ispecjasvol5iss2pp411-417 ◽

2021 ◽

Vol 5 (2) ◽

pp. 411-417

Author(s):

Berfin SARIHAN ◽

Özlem TONÇER

Keyword(s):

Essential Oil ◽

Oil Content ◽

Rosmarinus Officinalis ◽

Drying Methods ◽

Oil Composition ◽

Oven Drying ◽

Color Quality ◽

Rosmarinus Officinalis L ◽

The Impact

This study was conducted to evaluate the effects of different drying methods (shade drying, sun drying and oven drying at 40°C) on essential oil content, composition and color quality of rosemary (Rosmarinus officinalis L.). The essential oil content was obtained by hydro-distillation of dried plants, and were analyzed by GC-MS. The results showed that different drying methods had no significant effects on essential oil content, but essential oil constituents and percentage affected by drying methods as well. Camphor, (between 27.57 and 29.15%), 1.8 cineol (between 17.62 and 9.39%), borneol (11.25-12.37%) and linalool (between 7.30 and 8.18%) were the major essential oil compounds of different drying methods. In total regarding the essential oil composition, oven drying method can be recommended as the appropriate procedure for major constituents of rosemary essential oil. In this study, Lightness (L*), greenness (a*), and yellowness (b*) of dried leaves were also evaluated. Drying methods affected the color quality of the herb.

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