Foliar-applied nano-cerium dioxide differentially affect morpho-physiological traits and essential oil profile of Salvia mirzayanii Rech. f. & Esfand under drought stress and post-stress recovery conditions.

Autor: Fallah Imani A; Department of Horticulture Science, Arak Branch, Islamic Azad University, Arak, Iran., Gomarian M; Department of Agronomy and Plant Breeding, Arak Branch, Islamic Azad University, Arak, Iran., Ghorbanpour M; Department of Medicinal Plants, Faculty of Agriculture and Natural Resources, Arak University, Arak, 38156-8-8349, Iran; Institute of Nanosciences and Nanotechnology, Arak University, Arak, 38156-8-8349, Iran. Electronic address: m-ghorbanpour@araku.ac.ir., Ramak P; Research Division of Natural Resources, Lorestan Agricultural and Natural Resources Research and Education Centre, AREEO, Khorramabad, Iran., Chavoshi S; Department of Agronomy and Plant Breeding, Arak Branch, Islamic Azad University, Arak, Iran.
Jazyk: angličtina
Zdroj: Plant physiology and biochemistry : PPB [Plant Physiol Biochem] 2023 Oct; Vol. 203, pp. 108046. Date of Electronic Publication: 2023 Sep 21.
DOI: 10.1016/j.plaphy.2023.108046
Abstrakt: Drought stress is known to diminish the growth and yield of plants by altering the physiological, biochemical and molecular processes, thus threatening food security worldwide. Nanoparticles (NPs) have emerged as an effective strategy to raise plant productivity under current rapid environmental challenges. However, there is little literature on mechanisms underlying the beneficial role of re-watering in drought-stressed plants treated with NPs. In this study, the effects of cerium dioxide nanoparticles [(CeO 2 NPs), 0 (control), 125, 250, 500, and 1000 mL L -1 ] were investigated on morpho-physiological and phytochemical traits of Salvia mirzayanii plants under different drought stress intensities [(25%, 50%, 75%, and 100% (control) of field capacity (FC) moisture] and post-stress re-watering (recovery) in a three-way factorial arrangement based on randomized complete block design. Uptake and accumulation of CeO 2 NPs in the leaf tissue of plant samples were confirmed using SEM and EDX techniques. The results of ANOVA demonstrated that growth and physio-phytochemical traits were significantly (p < 0.05) affected by individual treatment and/or their double and triple interactions. Exposure to various levels of CeO 2 NPs during drought stress mitigated the adverse effects of stress on growth parameters (e.g., plant height, shoot and root dry weights, and root length) and photosynthetic pigments (chlorophyll a and b) content compared to the respective controls in varying degrees. However, proline and essential oil content were increased in drought-stressed plants, and tended to decrease during the period of recovery. Before re-watering, the antioxidant enzymes, CAT, POD, and SOD, activity in leaf tissues was increased with the increase of drought stress intensity upon both treated and non-treated CeO 2 NPs conditions. However, the three-way interaction results demonstrated that recovery after drought stress following CeO 2 NPs application particularly 1000 mL L -1 decreased the activity of antioxidant enzymes compared to the controls. Based on GC and GC-MS analysis, all essential oil samples predominantly composed of oxygenated monoterpenes and sesquiterpenes including Decane, Spathulenol, Octane, α-Terpinyl acetate, Hexyl isovalerate, Dodecane, Butanoic acid, Linalool, δ-Cadinene, Muurolol, α-Cadinol, Eudesm-7(11)-en-4-ol, which significantly (p < 0.05) changed under different experimental treatments. The recovery after stress, however, increased only the content of δ-Cadinene in plants from severe drought stress upon foliar application of 1000 mL L -1 CeO 2 NPs compared to the non-recovery period. Conclusively, integrative use of CeO 2 NPs and re-watering after drought stress could be an encouraging and eco-friendly strategy to improve both drought tolerance, growth and pyhtochemical contents in S. mirzayanii plants.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier Masson SAS. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: