Sarah Khorasaninejad; hassan soltanloo; seyedeh sanaz ramezanpour; javad hadian; Sadegh Atashi
Abstract
The current research was carried out according to a completely randomized design with three replications to study the effect of drought stress on growth parameters, essential oil constituents and yield of lavender at Gorgan University of Agricultural Sciences and Natural Resources in 2012. Five levels ...
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The current research was carried out according to a completely randomized design with three replications to study the effect of drought stress on growth parameters, essential oil constituents and yield of lavender at Gorgan University of Agricultural Sciences and Natural Resources in 2012. Five levels of water deficit stress including D1 (100 percent FC, control), D2 (85 percent FC), D3 (70 percent FC), D4 (55 percent FC) and D5 (40 percent FC) were investigated during four months. Results indicated that drought stress motivated a significant influence in all of the growth parameters and essential oil yield and percent (P<0.05). In decrease in soil water lead to reduce in stem length, shoot wet weight, root wet weight and root dry weight and increase in length of root and essential oil percent, at first, and then reduction in this two parameters. Reduction in growth parameters lead to reduce in number of flower in 5th level, therefor leaves essential oil were analysed because of uniformity in results. The highest values of essential oil percent were obtained under 85percent field capacity. The most important of essential oil component is Borneol that increased. The least values of Camphor were obtained under 85 percent field capacity. Also, the medium level of drought stress caused to icrease in percent and quality of lavender essential oil. .