Copper toxic stress on Aloe barbadensis and its antioxidant response
Toxic levels of copper (Cu) can cause deleterious effects such as protein denaturation and oxidative stress. Plants could respond to heavy metal tolerance through various mechanisms including alteration of their enzymatic antioxidant activity which acts as a toxicity tolerance mechanism. The aim...
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| Format: | Article |
| Language: | English |
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2015
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| Online Access: | http://eprints.intimal.edu.my/532/ http://eprints.intimal.edu.my/532/1/Copper%20toxic%20stress%20on%20Aloe%20barbadensis%20and.pdf |
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| author | Ong, Ghim Hock Aya Omer, Mustafa Omer Subramaniam, Geetha |
| author_facet | Ong, Ghim Hock Aya Omer, Mustafa Omer Subramaniam, Geetha |
| author_sort | Ong, Ghim Hock |
| building | INTI Institutional Repository |
| collection | Online Access |
| description | Toxic levels of copper (Cu) can cause deleterious effects such as protein
denaturation and oxidative stress. Plants could respond to heavy metal
tolerance through various mechanisms including alteration of their
enzymatic antioxidant activity which acts as a toxicity tolerance
mechanism. The aim of this study was to investigate the relationship
between Aloe barbadensis enzymatic antioxidants and its response to
different concentrations of Cu (control, 1ppm, 3ppm and 5ppm). A.
barbadensis were treated with different concentrations of Cu on a 4 days
cycle for a period of 21 days. Activity of the antioxidant enzymes namely
superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX)
and guaiacol peroxidase (GPX) were determined after 21 days. SOD
exhibited changes in activity in response to increased Cu concentration and
showed significantly higher (P<0.05) at 3ppm and 5ppm Cu compared to
1ppm. CAT exhibited changes in activity as Cu concentration increased
and showed no significant difference among the three levels of Cu. APX
exhibited changes in activity as Cu concentration increased and showed
significantly higher (P<0.05) at 1ppm when compared to 3ppm and 5ppm.
GPX exhibited changes in activity as Cu concentration increased and
showed no significance within three levels of Cu. In conclusion, the
enzymatic antioxidant exhibited relationship in activity. SOD antioxidant
was found to be the most effective in scavenging the reactive oxygen
species as it increases during copper stress and shows consistency in
activity. |
| first_indexed | 2025-11-14T11:52:06Z |
| format | Article |
| id | intimal-532 |
| institution | INTI International University |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:52:06Z |
| publishDate | 2015 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | intimal-5322016-10-20T07:26:59Z http://eprints.intimal.edu.my/532/ Copper toxic stress on Aloe barbadensis and its antioxidant response Ong, Ghim Hock Aya Omer, Mustafa Omer Subramaniam, Geetha TP Chemical technology Toxic levels of copper (Cu) can cause deleterious effects such as protein denaturation and oxidative stress. Plants could respond to heavy metal tolerance through various mechanisms including alteration of their enzymatic antioxidant activity which acts as a toxicity tolerance mechanism. The aim of this study was to investigate the relationship between Aloe barbadensis enzymatic antioxidants and its response to different concentrations of Cu (control, 1ppm, 3ppm and 5ppm). A. barbadensis were treated with different concentrations of Cu on a 4 days cycle for a period of 21 days. Activity of the antioxidant enzymes namely superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX) and guaiacol peroxidase (GPX) were determined after 21 days. SOD exhibited changes in activity in response to increased Cu concentration and showed significantly higher (P<0.05) at 3ppm and 5ppm Cu compared to 1ppm. CAT exhibited changes in activity as Cu concentration increased and showed no significant difference among the three levels of Cu. APX exhibited changes in activity as Cu concentration increased and showed significantly higher (P<0.05) at 1ppm when compared to 3ppm and 5ppm. GPX exhibited changes in activity as Cu concentration increased and showed no significance within three levels of Cu. In conclusion, the enzymatic antioxidant exhibited relationship in activity. SOD antioxidant was found to be the most effective in scavenging the reactive oxygen species as it increases during copper stress and shows consistency in activity. 2015 Article PeerReviewed text en http://eprints.intimal.edu.my/532/1/Copper%20toxic%20stress%20on%20Aloe%20barbadensis%20and.pdf Ong, Ghim Hock and Aya Omer, Mustafa Omer and Subramaniam, Geetha (2015) Copper toxic stress on Aloe barbadensis and its antioxidant response. Transaction on Science and Technology, 2 (1). pp. 65-73. ISSN 2289-8786 http://transectscience.org/archives.html |
| spellingShingle | TP Chemical technology Ong, Ghim Hock Aya Omer, Mustafa Omer Subramaniam, Geetha Copper toxic stress on Aloe barbadensis and its antioxidant response |
| title | Copper toxic stress on Aloe barbadensis and its antioxidant response |
| title_full | Copper toxic stress on Aloe barbadensis and its antioxidant response |
| title_fullStr | Copper toxic stress on Aloe barbadensis and its antioxidant response |
| title_full_unstemmed | Copper toxic stress on Aloe barbadensis and its antioxidant response |
| title_short | Copper toxic stress on Aloe barbadensis and its antioxidant response |
| title_sort | copper toxic stress on aloe barbadensis and its antioxidant response |
| topic | TP Chemical technology |
| url | http://eprints.intimal.edu.my/532/ http://eprints.intimal.edu.my/532/ http://eprints.intimal.edu.my/532/1/Copper%20toxic%20stress%20on%20Aloe%20barbadensis%20and.pdf |