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  A Novel Aspect of Essential Oils: Coating Seeds with Thyme Essential Oil induces Drought Resistance in Wheat

Ben-Jabeur, M., Vicente, R., López-Cristoffanini, C., Alesami, N., Djébali, N., Gracia-Romero, A., et al. (2019). A Novel Aspect of Essential Oils: Coating Seeds with Thyme Essential Oil induces Drought Resistance in Wheat. Plants, 8(10): 371. doi:10.3390/plants8100371.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-CA20-4 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-CA21-3
Genre: Journal Article

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Ben-Jabeur, Maissa1, Author
Vicente, R.2, Author              
López-Cristoffanini, Camilo1, Author
Alesami, Noura1, Author
Djébali, Naceur1, Author
Gracia-Romero, Adrian1, Author
Serret, Maria Dolores1, Author
López-Carbonell, Marta1, Author
Araus, Jose Luis1, Author
Hamada, Walid1, Author
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1External Organizations, ou_persistent22              
2System Regulation, Department Stitt, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753327              

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 Abstract: Coating seeds with biostimulants is among the promising approaches in crop production to increase crop tolerance to drought stress. In this study, we evaluated the potential of coating durum wheat seeds of the cultivar lsquo;Karimrsquo; with thyme essential oil on enhancing seed germination and seedling growth, and on plant growth promotion and induction of drought resistance. Coated seeds were pre-germinated, grown in hydroponics, and grown in pots under controlled well-watered and progressive water/nutrient stress conditions. Seed coating with thyme oil increased germination rate and enhanced seedling growth development in hydroponics. In the pot experiment, thyme oil increased, when well watered, root and shoot development, chlorophyll, nitrogen balance index (NBI), abscisic acid (ABA), anthocyanins and flavonoids in leaves, decreased nitrogen isotope composition (delta;15N) and increased carbon isotope composition (delta;13C) of shoots. Increasing water/nutrient stress in control plants induced higher accumulation of ABA and anthocyanins coupled with a transient decrease in chlorophyll and NBI, a decrease in shoot and root development, the Normalized Difference Vegetation Index (NDVI), shoot C content, delta;15N, and an increase in delta;13C, revealing the avoidance strategy adopted by the cultivar. Thyme oil had the potential to enhance the avoidance strategy by inducing roots elongation, reducing the loss of shoot and roots dry matter and chlorophyll, maintaining balanced NBI, an decreasing anthocyanins, flavonoids, and delta;13C via maintaining lower ABA-mediated-stomatal closure. Thyme oil increased shoot N content and delta;15N indicating preferential uptake of the 15N enriched NH4+. Coating seeds with thyme oil is suggested as a promising alternative approach to improve plantrsquo;s water and nutrient status and to enhance drought resistance.

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Language(s): eng - English
 Dates: 2019
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: DOI: 10.3390/plants8100371
BibTex Citekey: plants8100371
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Title: Plants
Source Genre: Journal
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Publ. Info: Basel : MDPI
Pages: - Volume / Issue: 8 (10) Sequence Number: 371 Start / End Page: - Identifier: ISSN: 2223-7747
CoNE: https://pure.mpg.de/cone/journals/resource/2223-7747