Effects of drought stress on dry matter accumulation, nutrient concentration and soluble carbohydrate of Salvia macrosiphon as a medicinal plant

Document Type : Research Paper

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Abstract

This study was conducted to evaluate the effects of water stress on dry matter and carbohydrate accumulation as well as nutrient status of Salvia macrosiphon. A completely randomized design with three replications was used in an experimental greenhouse at Yazd University. Different levels of drought stress including 100, 75, 50 and 25% of field capacity were considered as treatments. Results showed that absorption of potassium, calcium, magnesium, nitrogen, phosphorus, sodium, zinc, iron and copper as well as, dry matter accumulation were significantly affected by drought stress.Result also indicated that water stress has significant (P≤0.01) effect on soluble carbohydrate. Mean comparison test showed that the dry matter accumulation rate (total dry weight of root and shoot dry weight) and concentration of potassium, calcium, magnesium, nitrogen and phosphorus decreased by increasing drought stress, whereas concentration of sodium, zinc, iron, copper and solution carbohydrate was increased in response to deficiency of water.

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