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Ameliorating effects of exogenously applied proline on seed composition, seed oil quality and oil antioxidant activity of maize (Zea mays L.) under drought stress

This study was carried out to appraise whether or not the exogenous application of a potential osmoprotectant, proline, could ameliorate the adverse effects of drought stress on maize seed and seed oil composition, as well as oil antioxidant activity. Water stress reduced the kernel sugar, oil, prot...

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Main Authors: Ali, Qasim, Anwar, Farooq, Ashraf, Muhammad, Saari, Nazamid, Perveen, Rashida
Format: Article
Language:English
Published: MDPI 2013
Online Access:http://psasir.upm.edu.my/id/eprint/78038/1/78038.pdf
http://psasir.upm.edu.my/id/eprint/78038/
https://www.mdpi.com/1422-0067/14/1/818
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spelling my.upm.eprints.780382020-05-03T22:32:39Z http://psasir.upm.edu.my/id/eprint/78038/ Ameliorating effects of exogenously applied proline on seed composition, seed oil quality and oil antioxidant activity of maize (Zea mays L.) under drought stress Ali, Qasim Anwar, Farooq Ashraf, Muhammad Saari, Nazamid Perveen, Rashida This study was carried out to appraise whether or not the exogenous application of a potential osmoprotectant, proline, could ameliorate the adverse effects of drought stress on maize seed and seed oil composition, as well as oil antioxidant activity. Water stress reduced the kernel sugar, oil, protein and moisture contents and most of the seed macro- and micro-elements analyzed in both maize cultivars but it increased the contents of seed fiber and ash. Water stress increased the oil oleic acid content with a subsequent decrease in the amount of linoleic acid, resulting in an increased oil oleic/linoleic ratio for both maize cultivars. However, no variation was observed in oil stearic and palmitic acids content due to water stress. A considerable drought induced an increase in seed oil α-, γ-, δ- and total tocopherols and flavonoids were observed in both maize cultivars. However, oil phenolic and carotenoid content as well as 1,1-diphenyl-2-picryl-hydrazyl (DPPH) free radical scavenging activity decreased. Foliar-applied proline significantly increased the content of seed sugar, oil, protein, moisture, fiber and ash in both maize cultivars under well irrigated and water deficit conditions. Furthermore, exogenous application of proline increased the oil oleic and linoleic acid contents. The concentrations of antioxidant compounds namely phenolics, carotenoids, flavonoids and tocopherols estimated in the seed oil increased due to foliar-applied proline under water deficit conditions that was positively correlated with the enhanced oil DPPH free radical scavenging activity. Moreover, the increase in the contents of these antioxidant compounds and oil antioxidant activity due to the foliar application of proline was noted to be more pronounced under water deficit conditions. MDPI 2013 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/78038/1/78038.pdf Ali, Qasim and Anwar, Farooq and Ashraf, Muhammad and Saari, Nazamid and Perveen, Rashida (2013) Ameliorating effects of exogenously applied proline on seed composition, seed oil quality and oil antioxidant activity of maize (Zea mays L.) under drought stress. International Journal of Molecular Sciences, 14 (1). pp. 818-835. ISSN 1661-6596; ESSN: 1422-0067 https://www.mdpi.com/1422-0067/14/1/818 10.3390/ijms14010818
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description This study was carried out to appraise whether or not the exogenous application of a potential osmoprotectant, proline, could ameliorate the adverse effects of drought stress on maize seed and seed oil composition, as well as oil antioxidant activity. Water stress reduced the kernel sugar, oil, protein and moisture contents and most of the seed macro- and micro-elements analyzed in both maize cultivars but it increased the contents of seed fiber and ash. Water stress increased the oil oleic acid content with a subsequent decrease in the amount of linoleic acid, resulting in an increased oil oleic/linoleic ratio for both maize cultivars. However, no variation was observed in oil stearic and palmitic acids content due to water stress. A considerable drought induced an increase in seed oil α-, γ-, δ- and total tocopherols and flavonoids were observed in both maize cultivars. However, oil phenolic and carotenoid content as well as 1,1-diphenyl-2-picryl-hydrazyl (DPPH) free radical scavenging activity decreased. Foliar-applied proline significantly increased the content of seed sugar, oil, protein, moisture, fiber and ash in both maize cultivars under well irrigated and water deficit conditions. Furthermore, exogenous application of proline increased the oil oleic and linoleic acid contents. The concentrations of antioxidant compounds namely phenolics, carotenoids, flavonoids and tocopherols estimated in the seed oil increased due to foliar-applied proline under water deficit conditions that was positively correlated with the enhanced oil DPPH free radical scavenging activity. Moreover, the increase in the contents of these antioxidant compounds and oil antioxidant activity due to the foliar application of proline was noted to be more pronounced under water deficit conditions.
format Article
author Ali, Qasim
Anwar, Farooq
Ashraf, Muhammad
Saari, Nazamid
Perveen, Rashida
spellingShingle Ali, Qasim
Anwar, Farooq
Ashraf, Muhammad
Saari, Nazamid
Perveen, Rashida
Ameliorating effects of exogenously applied proline on seed composition, seed oil quality and oil antioxidant activity of maize (Zea mays L.) under drought stress
author_facet Ali, Qasim
Anwar, Farooq
Ashraf, Muhammad
Saari, Nazamid
Perveen, Rashida
author_sort Ali, Qasim
title Ameliorating effects of exogenously applied proline on seed composition, seed oil quality and oil antioxidant activity of maize (Zea mays L.) under drought stress
title_short Ameliorating effects of exogenously applied proline on seed composition, seed oil quality and oil antioxidant activity of maize (Zea mays L.) under drought stress
title_full Ameliorating effects of exogenously applied proline on seed composition, seed oil quality and oil antioxidant activity of maize (Zea mays L.) under drought stress
title_fullStr Ameliorating effects of exogenously applied proline on seed composition, seed oil quality and oil antioxidant activity of maize (Zea mays L.) under drought stress
title_full_unstemmed Ameliorating effects of exogenously applied proline on seed composition, seed oil quality and oil antioxidant activity of maize (Zea mays L.) under drought stress
title_sort ameliorating effects of exogenously applied proline on seed composition, seed oil quality and oil antioxidant activity of maize (zea mays l.) under drought stress
publisher MDPI
publishDate 2013
url http://psasir.upm.edu.my/id/eprint/78038/1/78038.pdf
http://psasir.upm.edu.my/id/eprint/78038/
https://www.mdpi.com/1422-0067/14/1/818
_version_ 1665896052700479488
score 13.211869

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