Salinity stress evaluation on Moldavian balm (Dracocephalum moldavica L.) under aeroponic system condition

Document Type : Research Paper

Authors

1 M.Sc. Student, Department of Genetics and Plant Production, Faculty of Agriculture, Malayer University, Malayer, Iran

2 Department of Genetics and Plant Production, Faculty of Agriculture, Malayer University, Malayer, Iran

3 Department of Genetics and Plant Production, Faculty of Agriculture, University of Maragheh, Maragheh, Iran

Abstract

The present study was conducted in a completely randomized design with three replications in four concentrations of sodium chloride (0.25, 1, 2 dS m-2), to determine the effect of different levels of salinity stress on morphological and physiological characteristics of herbaceous plant under an aeroponics . All traits measured in the plant under stress, especially at the highest concentration of sodium chloride (2 dS m-2), showed a significant decrease compared to the control. NaCl at 2 dS m-2 induced- salinity reduced the number of leaves per plant by 43.58% compared to the control. The highest number of hairy roots was observed in salinity treatment with 0.25 dS m-2, which was accompanied by a significant decrease with increasing sodium chloride concentration to 2 dS m-2. The highest number of hairy roots was observed in salinity treatment with 0.25 dS m-2, which was accompanied by a significant decrease with increasing sodium chloride concentration to 2 dS m-2. Maximum total chlorophyll content (36.36 mg g-1 FW) and carotenoid (849.7 mg g-1 FW, fresh weight) were related to the control treatment and with increasing salt concentration; there was a significant decrease in these traits. With increase in salinity stress, the accumulation of sodium and potassium in leaves increased and decreased, respectively. The total leaf protein content, proline accumulation and antioxidant activity of catalase and peroxidase at the highest salt concentration (2 dS m-2) showed a significant increase compared to control.

Keywords

Main Subjects