M.R. Ardakani; B. Abbaszadeh; M.H. Assare; F. Paknezhad; A. Kashani; M. Layegh Haghighi
Abstract
One of the methods of natural resource management is utilization of inefficient lands and use of resistant plant species in hard conditions. In this study, sampling from natural habitat in Arak (Markazi province) was conducted in 2009 at 3 growth stages including growth, full flowering and maturity using ...
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One of the methods of natural resource management is utilization of inefficient lands and use of resistant plant species in hard conditions. In this study, sampling from natural habitat in Arak (Markazi province) was conducted in 2009 at 3 growth stages including growth, full flowering and maturity using plots with replication. In full flowering stage, plant height, number of tillers, big and small diameter, root length, root weight, chlorophyll, plant dry weight, soluble sugar content, proline, sodium, potassium, magnesium, calcium, chlorine and iron were measured. Mean comparison of morphological characters showed that the largest values of plant height, number of tillers, canopy cover, total shoot and flowering shoot were recorded for the region (locality 3) with less salinity (EC= 7.6 dS/m). The largest values of root length, root weight and essential oil percentage at growthing, full flowering and maturity stages were also recorded for locality 1 with high salinity (EC= 11.7dS/m). Locality 1 showed the highest content of soluble sugar, proline, sodium, potassium, magnesium, calcium, and chlorine. Locality 3 had the highest total content of chlorophyll, chlorophyll a and b while the highest iron content was related to locality 2. Results of correlation showed that there was negative significant relationship between plants height with essential oil percentage in full flowering stage. Significant correlation was also observed between soluble sugar and proline, magnesium, calcium and chlorine. There was significant negative correlation between soluble sugar and total chlorophyll 2. According to the results, Camphorosma monspilica L. is one of the salt tolerant plant species probably with medicinal and forage values.
M. Ghorbanli; ْا. Bakhshi Khaniki; S Salimi Elizei; M. Hedayati
Abstract
In this research, proline, soluble sugars, catalase and glutathione peroxidase levels which change in response to water deficiency and the effect of ascorbic acid as protecting factor in Nigella sativa L. were surveyed. Plants were cultured in greenhouse and irrigated based on the following treatments: ...
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In this research, proline, soluble sugars, catalase and glutathione peroxidase levels which change in response to water deficiency and the effect of ascorbic acid as protecting factor in Nigella sativa L. were surveyed. Plants were cultured in greenhouse and irrigated based on the following treatments: 1) Control with irrigation equal to field capacity, 2) two third of field capacity, 3) one third of field capacity, 4) two third of field capacity along with 10 mM ascorbic acid, 5) two third of field capacity along with 1 mM ascorbic acid, 6) one third of field capacity along with 10 mM ascorbic acid, 7) one third of field capacity along with 1 mM ascorbic acid. Proline and soluble sugars levels in shoots and roots were significantly different for all treatments except for the treatment with 2/3 field capacity along with 10 mM ascorbic acid. Enzymes levels in 1/3 and 2/3 treatments were significantly different in both shoots and roots. One mM ascorbic acid along with different field capacity showed no reducing effect. However, 10 mM ascorbic acid especially in 2/3 field capacity could reduce the effect of water deficit through reduction in level of metabolites produced in response to low irrigation.
B. Abbaszadeh; E. Sharifi Ashourabadi; M.H. Lebaschi; M. Naderi hajibagher Kandy; F. Moghadami
Abstract
In this research effect of drought stress on physiological characteristics of balm (Melissa officinalis L.) was performed under field condition in Karaj, Iran in 2005. Experiment was conducted using randomized complete block design with 4 replications. Treatment included T1 (non stress), T2 (80%FC), ...
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In this research effect of drought stress on physiological characteristics of balm (Melissa officinalis L.) was performed under field condition in Karaj, Iran in 2005. Experiment was conducted using randomized complete block design with 4 replications. Treatment included T1 (non stress), T2 (80%FC), T3 (60%FC), T4 (40%FC) and T5 (20%FC). Effect of drought stress on chlorophyll a, chlorophyll b, proline, soluble sugars, relative water contents, percentage and yield of essential oil were significant (α=0.001). Effect of drought stress on total chlorophyll was significant (α=0.005). Comparison of treatment means showed that highest chlorophyll a (1.921mg/l), chlorophyll b (1.197mg/l), total chlorophyll (2/283mg/l) were related to T1 (control), T5 (20%FC) and T1 (control), respectively. Highest accumulation of proline with 2.545 mg/l mean was related to T3 (60%FC). Maximum relative water content with 93.369 mean percentage related to T1 (control). It could be concluded that plant accumulation of proline and solublesugars increased tolerance and showed that moderate drought stress is beneficial for balm production.
