تأثير محلول‌پاشي برگي سلنيوم بر صفات مورفوفيزيولوژيك و بيوشيميايي مريم‌گلي دارويي (.Salvia officinalis L) تحت تنش كم‌آبياري

Drought is one of the most important abiotic stresses limiting the growth an‎d performance of plants, which, by causing disturbances in physiological an‎d biochemical processes, leads to a reduction in growth an‎d biomass production. The use of beneficial elements such as selenium can increase the tolerance of plants to drought stress by strengthening the antioxidant defense system, maintaining water status, an‎d reducing oxidative damage. Sage (Salvia officinalis L.) Is also of particular importance due to Its medicinal an‎d economic value an‎d Its application in green spaces. This study was conducted to investigate the effect of selenium foliar application on some morphological, physiological, an‎d biochemical traits of sage under drought stress, as a two-factor factorial experiment in a ran‎domized complete block design with four replications in a greenhouse. The experimental treatments included three irrigation levels (80, 60, an‎d 40% of field capacity) an‎d three selenium concentrations (0, 50, an‎d 100 mg/L sodium selenate). At the end of the experiment, morphological traits, water status, photosynthetic pigments, electrolyte leakage, proline, malondialdehyde, total protein, total phenol, an‎d the activities of catalase an‎d ascorbate peroxidase enzymes were measured. The results showed that drought stress caused a decrease in plant height, fresh an‎d dry weight of aerial organs an‎d roots, relative water content, chlorophyll fluorescence, photosynthetic pigments, total protein, an‎d catalase activity, while causing an increase in dryness percentage, electrolyte leakage, proline, malondialdehyde, an‎d total phenol. Ascorbate peroxidase activity increased under moderate stress but decreased under severe stress. Selenium foliar application also produced different responses depending on the concentration an‎d stress intensity; thus, the concentration of 50 mg/L improved the fresh weight of aerial organs an‎d roots, total protein, an‎d ascorbate peroxidase activity, whereas the concentration of 100 mg/L increased electrolyte leakage an‎d decreased total protein. The interaction between drought stress an‎d selenium was also significant for some traits an‎d showed that the response of sage to selenium depended on the intensity of drought stress. Overall, appropriate selenium foliar application, particularly at a concentration of 50 mg/L, can be effective in reducing some of the detrimental effects of drought stress an‎d improving the growth, physiological, an‎d biochemical characteristics of sage.

مهدي رحيم ملك , نعمت اله اعتمادي شلمزاري

رحيم اميري خواه

مهديه غلامي , پرويز احسان زاده