Surface chemistry and germination improvement of Quinoa seeds subjected to plasma activation

Abstract Plasma treatment is recognized as a suitable technology to improve germination efficiency of numerous seeds. In this work Quinoa seeds have been subjected to air plasma treatments both at atmospheric and low pressure and improvements found in germination rate and percentage of success. Seed...

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Autores principales:	A. Gómez-Ramírez, C. López-Santos, M. Cantos, J. L. García, R. Molina, J. Cotrino, J. P. Espinós, A. R. González-Elipe
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/08357ed57957488eace06c4d1af74ca4
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spelling	oai:doaj.org-article:08357ed57957488eace06c4d1af74ca42021-12-02T15:05:52ZSurface chemistry and germination improvement of Quinoa seeds subjected to plasma activation10.1038/s41598-017-06164-52045-2322https://doaj.org/article/08357ed57957488eace06c4d1af74ca42017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-06164-5https://doaj.org/toc/2045-2322Abstract Plasma treatment is recognized as a suitable technology to improve germination efficiency of numerous seeds. In this work Quinoa seeds have been subjected to air plasma treatments both at atmospheric and low pressure and improvements found in germination rate and percentage of success. Seed water uptake by exposure to water vapor, although slightly greater for plasma treated seeds, did not justify the observed germination improvement. To identify other possible factors contributing to germination, the chemical changes experienced by outer parts of the seed upon plasma exposure have been investigated by X-ray photoemission spectroscopy (XPS) and scanning electron microscopy (SEM-EDX). XPS revealed that the outer layers of the Quinoa plasma treated seeds were highly oxidized and appeared enriched in potassium ions and adsorbed nitrate species. Simultaneously, SEM-EDX showed that the enrichment in potassium and other mineral elements extended to the seed pericarp and closer zones. The disappearance from the surface of both potassium ions and nitrate species upon exposure of the plasma treated seeds to water vapor is proposed as a factor favoring germination. The use of XPS to study chemical changes at seed surfaces induced by plasma treatments is deemed very important to unravel the mechanisms contributing to germination improvement.A. Gómez-RamírezC. López-SantosM. CantosJ. L. GarcíaR. MolinaJ. CotrinoJ. P. EspinósA. R. González-ElipeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-12 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q A. Gómez-Ramírez C. López-Santos M. Cantos J. L. García R. Molina J. Cotrino J. P. Espinós A. R. González-Elipe Surface chemistry and germination improvement of Quinoa seeds subjected to plasma activation
description	Abstract Plasma treatment is recognized as a suitable technology to improve germination efficiency of numerous seeds. In this work Quinoa seeds have been subjected to air plasma treatments both at atmospheric and low pressure and improvements found in germination rate and percentage of success. Seed water uptake by exposure to water vapor, although slightly greater for plasma treated seeds, did not justify the observed germination improvement. To identify other possible factors contributing to germination, the chemical changes experienced by outer parts of the seed upon plasma exposure have been investigated by X-ray photoemission spectroscopy (XPS) and scanning electron microscopy (SEM-EDX). XPS revealed that the outer layers of the Quinoa plasma treated seeds were highly oxidized and appeared enriched in potassium ions and adsorbed nitrate species. Simultaneously, SEM-EDX showed that the enrichment in potassium and other mineral elements extended to the seed pericarp and closer zones. The disappearance from the surface of both potassium ions and nitrate species upon exposure of the plasma treated seeds to water vapor is proposed as a factor favoring germination. The use of XPS to study chemical changes at seed surfaces induced by plasma treatments is deemed very important to unravel the mechanisms contributing to germination improvement.
format	article
author	A. Gómez-Ramírez C. López-Santos M. Cantos J. L. García R. Molina J. Cotrino J. P. Espinós A. R. González-Elipe
author_facet	A. Gómez-Ramírez C. López-Santos M. Cantos J. L. García R. Molina J. Cotrino J. P. Espinós A. R. González-Elipe
author_sort	A. Gómez-Ramírez
title	Surface chemistry and germination improvement of Quinoa seeds subjected to plasma activation
title_short	Surface chemistry and germination improvement of Quinoa seeds subjected to plasma activation
title_full	Surface chemistry and germination improvement of Quinoa seeds subjected to plasma activation
title_fullStr	Surface chemistry and germination improvement of Quinoa seeds subjected to plasma activation
title_full_unstemmed	Surface chemistry and germination improvement of Quinoa seeds subjected to plasma activation
title_sort	surface chemistry and germination improvement of quinoa seeds subjected to plasma activation
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/08357ed57957488eace06c4d1af74ca4
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Surface chemistry and germination improvement of Quinoa seeds subjected to plasma activation

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