Protecting and improving the quantity and quality of essential oils and enzymatic activities of Lippia citriodora H.B.K. by exogenous anti-chilling agents under different temperatures

H Rafiee | A Mehrafarin | Heshmat Omidi | Farahnaz Khalighi Sigaroodi | H Anaghdibadi

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URL :   http://research.shahed.ac.ir/WSR/WebPages/Report/PaperView.aspx?PaperID=116756
Date :  2019/08/24
Publish in :    Acta Physiologiae Plantarum

Link :  https://link.springer.com/article/10.1007/s11738-019-2958-y
Keywords :

Abstract :

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Lemon verbena (Lippia citriodora H.B.K.) from verbanaceae is an aromatic plant indigenous to South America and is being used as a traditional remedy. Polymers as relatively modern materials have been widely used in agriculture. To evaluate the effect of polymers formulations on phytochemical traits of Lippia citriodora H.B.K., two factorial experiments were conducted on the basis of randomized complete blocks design with 40 treatments and 3 replications. The first factor was foliar application of synthetic polymers in 8 levels ( Control, 6v/v Glycerol (GLY), 6v/v Ethylene glycol (EG), 6v/v Poly (vinyl alcohol) (PVA), 3v/v GLY +3v/v EG, 3v/v GLY + 3 v/v PVA, 3v/v EG + 3v/v PVA, 2v/v GLY + 2v/v EG + 2v/v PVA). The second factor was induction of temperatures in 5 levels (5, 10, 15, 20 and 25˚C). The results showed that interaction effect of polymers and temperatures was significant on essential oil and its components. at low temperatures (5 and 10 °C) the greatest leaves dry weight in plants was resulted in treatments of 2v/v GLY + 2v/v EG + 2v/v PVA and 3v/v GLY +3v/v EG and the highest content of essential oil was observed by 6v/v GLY. The higher components of oxygenated monoterpenes showed the best result (54.382) by 6v/v GLY at 5°C. As a conclusion, the foliar application of polymers formulations could inproveimprove the quality and quantity of lemon verbena essential oil.