year 16, Issue 62 (5-2017)                   J. Med. Plants 2017, 16(62): 191-207 | Back to browse issues page

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Effect of Multi-Walled Carbon Nanotubes on Physiological Traits, Phenolic Contents and Antioxidant Capacity of Salvia mirzayanii Rech. f. & Esfand. under Drought Stress. J. Med. Plants. 2017; 16 (62) :191-207
Abstract:   (282 Views)

Background: Environmental stresses and biotic and abiotic elicitors induce secondary metabolites biosynthesis and hypersensitive response in plants through activation of defense mechanisms.  

Aim: This study was carried out with the aim of assessing the effects of different drought stress and multi-walled carbon nanotubes (MWCNTs) levels on physiological variations, flavonoid and phenolic contents, and antioxidant capacity of Salvia mirzayanii.

Methods: This study was arranged in a factorial experiment based on randomized complete block design under research greenhouse of medicinal plants department at Arak University. The first factor was considered as drought stress in 4 levels including 100, 75, 50 and 25% of field capacity (FC), and the second factor was designated as foliar spray of MWCNTs (functionalized and non- functionalized) at 4 different concentrations (0, 50 and 200 mg/L for functionalized MWCNTs, and 50 mg/L for non- functionalized MWCNTs).

Results: Results showed that drought stress and MWCNTs and their interactions significantly affected some studied traits. Leaf relative water content (p < 0.01) and chlorophyll index (p < 0.05) was significant under drought stress treatment, however, electrolyte leakage index significantly (p < 0.01) changed under different levels of MWCNTs. Furthermore, total phenolics was significantly (p < 0.01) changed under interaction of experimental treatments. The highest and the lowest phenolics content were achieved in functionalized MWCNTs exposed plants at 50 and 200 mg/L under 25% of FC, respectively. Maximum antioxidant activity was observed in extract originated from plants simultaneously treated with functionalized MWCNTs at 50 mg/L and drought stress at level of 25% FC. 

Conclusion: Application of functionalized MWCNTs at concentration of 50 mg/L along with moderate drought stress improved physiological traits and antioxidant activity of extract in S. mirzayanii plants.

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Type of Study: Research | Subject: Agriculture & Ethnobotany
Received: 2016/11/23 | Accepted: 2017/01/14 | Published: 2017/05/27

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