Abstract
Background Artemisia aucheri BOISS is a medicinal and aromatic plant, which is endemic to mountainous areas of Iran and surroundings. In this study, we investigated the alleviating effects of salicylic acid (SA) pretreatment (0.01 and 0.1 mM) on A. aucheri under in vitro drought stress induced by 2 and 4% polyethylene glycol (PEG/6000).ResultsPlants exposed to PEG stress showed higher levels of H2O2, MDA and electrolyte leakage compared with control. While SA pretreatment decreased these parameters under PEG stress significantly. The activity of CAT, POD, APX, SOD and GR positively changed with PEG and more induction in activity of antioxidant enzymes was observed in SA-pretreated plants under PEG stress. Furthermore, ASA, GSH and their redox ratios (ASC/DHA and GSH/GSSG) enhanced with SA pretreatments. Analysis of our data revealed that MDA, DHA and H2O2 were the best targets for SA under in vitro PEG treatment for A. aucheri plants.ConclusionsSalicylic acid as a signal molecule mitigated adverse effects of PEG-simulated drought stress on A. aucheri under in vitro condition by improving the activity of antioxidant enzymes. In addition, protective role of SA was also related to promotion of ascorbate–glutathione cycle.
Highlights
Artemisia aucheri BOISS is a medicinal and aromatic plant, which is endemic to mountainous areas of Iran and surroundings
hydrogen peroxide (H2O2) content, lipid peroxidation and electrolyte leakage H2O2 level of pretreated plant with 0.1 mM salicylic acid (SA) was significantly higher than control plants, without Polyethylene glycol (PEG) stress
SA pretreatments had a positive effect in reduction of H2O2 content under 2 and 4% PEG compared with plants without SA pretreatment (Fig. 1A)
Summary
Artemisia aucheri BOISS is a medicinal and aromatic plant, which is endemic to mountainous areas of Iran and surroundings. Artemisia aucheri BOISS is a medicinal and aromatic plant belongs to Asteraceae family. Artemisia aucheri is limited mostly to mountainous landscapes with high slope, sandy soils and with annual precipitation of 300–450 mm (Hosseini et al 2013). Morphological features of this plant consist of perennial, suffrutescent, stem numerous and erect, indumentum white-tomentose, leaves pinnate or bipinnate, capitula arranged in a panicle-congested, calathium sessile and ovate, phyllaries imbricate and multiseriate, Water stress is one of the major environmental stresses that limit plant growth and development around the world.
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