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Paper Information

Journal:   INTERNATIONAL JOURNAL OF PLANT PRODUCTION   JANUARY 2013 , Volume 7 , Number 1; Page(s) 151 To 166.
 
Paper: 

INFLUENCE OF WATER STRESS ON MORPHO-PHYSIOLOGICAL AND PHYTOCHEMICAL TRAITS IN THYMUS DAENENSIS

 
 
Author(s):  BAHREININEJAD B., RAZMJOU J.*, MIRZA M.
 
* DEPARTMENT OF AGRONOMY AND PLANT BREEDING, COLLEGE OF AGRICULTURE, ISFAHAN UNIVERSITY OF TECHNOLOGY, 84156-83111, ISFAHAN, IRAN
 
Abstract: 

Thymus daenensisis a medicinal plant endemic to semi-arid regions of Iran. A field experiment using a randomized complete block design with four replications was conducted to evaluate the effect of 20, 50 and 80% soil water depletion on morpho-physiological traits, essential oil content and composition and water use efficiency ofT. daenensis during 2010-2011. Water stress reduced growth, herbage production, chlorophyll and carotenoid content, while increased proline, K+, essential oil content and irrigation water use efficiency based on essential oil yield (IWUEeso). Thymol was the highest essential oil composition (63.3-73.5%) followed by carvacrol (3.6-16.0%), r-cymene (3.8-7.4%), g-terpinene (3.3-4.7%), b-caryophyllene (2.8-4.0%) and borneol (1.4-3.4%), respectively. Thymol, r-cymene and g-terpinene were increased, while the other compositions decreased under water stress. It is concluded that irrigation of T. daenensis based on 50% water depletion should be an appropriate choice for first growing season and 80% water depletion for the second growing season in semi-arid climatic conditions.

 
Keyword(s): THYMUS DAENENSIS, WATER DEFICIT, GROWTH, ESSENTIAL OIL
 
References: 
 
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