F. Safikhani; H. Heydarye sharifabadi; S.A. Syadat; E. Sharifi ashorabadi; S.M. Syednedjad; B. Abbaszadeh
Volume 23, Issue 2 , August 2007, , Pages 183-194
Abstract
In order to investigate the effect of drought stress on yield and morphologic characteristics of Deracocephalum moldavica L. under field condition, this research wsa conducted in 2004-2005 at Alborz station. Experiment was carried out in a split plot with randomized complete block design with four replications. ...
Read More
In order to investigate the effect of drought stress on yield and morphologic characteristics of Deracocephalum moldavica L. under field condition, this research wsa conducted in 2004-2005 at Alborz station. Experiment was carried out in a split plot with randomized complete block design with four replications. Main factors consisted of three plant populations of Deracocephalum moldavica L. which were collected from Tehran, Esfahan and Farse provinces. Subplots consisted of three level of drought stress (100%, 60% and 40% Fc). The results showed the effect of different plant population on morphological characteristics and yield were not significant. Effect of drought stress on length, cross and leaf surface, high plant, stem diameter, lateral shoot, length of highest internodes, weight of 1000 grain and flower shoot, leaf, stem and biological yield were significant. Mean of treatments showed that control (without drought stress treatments) at first and second years were 4126 and 4033 kg/ha of flower shoot and 4929 and 4921 kg/ha biological yield had significant differences with other drought levels. Mean of interaction effects of main and sub plots not showed significant difference for shoot flower production. Highest biological yield was related to controls of three plant population which were different to other treatments. It could be included from this investigation that mild stress could be applied in complete flower stage harvest.
F. Safikhani; H. Heydari sharifabad; A. Syadat; E. Sharifi Ashorabadi; S.M. Syednedjad; B. Abbaszadeh
Volume 23, Issue 1 , May 2007, , Pages 86-99
Abstract
In order to investigation effect of drought stress essential oil percent and yield and physiological characteristics of medicinal plant Deracocephalum moldavica L. under greenhouse. This research performed in 2004-2005 at research institute of forests and rangelands. Experiment was carried out in a split ...
Read More
In order to investigation effect of drought stress essential oil percent and yield and physiological characteristics of medicinal plant Deracocephalum moldavica L. under greenhouse. This research performed in 2004-2005 at research institute of forests and rangelands. Experiment was carried out in a split plot under randomize complete block design with four replications. Main factors were contains of three populations of Deracocephalum moldavica L. that collected from Tehran, Esfahan and Fars provinces. Subplots were contains three level of drought stress 100% Fc, 60% Fc and 40% Fc. The results showed that effect of different populations not significant. The results showed that effect of drought stress on essence yield, amount of solution carbohydrates, amount of a, b and total chlorophyll at two years were significant. So effect of drought stress on proline in second year was significant. The results analysis variation of two years showed that effect of year on essential oil percent and proline amount was significant (α=1%). Comparison mean of treatments showed that at first year highest of essence yield, solution carbohydrate and chlorophyll respectively related to 60%, 40% and 100% of field capacity treatments. At second year highest proline amount, solution carbohydrate and chlorophyll respectively related to 40%, 40% and 100% of field capacity treatments. Comparison mean treatments of plant populations and different levels of drought stress showed that at first year highest of essential oil percent related to Esfahan seed*60% humidity of field capacity. Highest chlorophyll relate to 100% humidity of field capacity in three ecotypes. At second year highest solution carbohydrate and chlorophyll respectively related to 40% and 100% of field capacity in three populations.
