Exogenous 24-Epibrassinolide stimulates root protection, and leaf antioxidant enzymes in lead stressed rice plants : Central roles to minimize Pb content and oxidative stress
Copyright © 2021 Elsevier Ltd. All rights reserved..
Lead (Pb) is an environmental pollutant that negatively affects rice plants, causing damage to the root system and chloroplast structures, as well as reducing growth. 24-Epibrasnolide (EBR) is a plant growth regulator with a high capacity to modulate antioxidant metabolism. The objective of this research was to investigate whether exogenous EBR application can mitigate oxidative damage in Pb-stressed rice plants, measure anatomical structures and evaluate physiological and biochemical responses connected with redox metabolism. The experiment was randomized with four treatments, including two lead treatments (0 and 200 μM PbCl2, described as - Pb and + Pb, respectively) and two treatments with brassinosteroid (0 and 100 nM EBR, described as - EBR and + EBR, respectively). The results revealed that plants exposed to Pb suffered significant disturbances, but the EBR alleviated the negative interferences, as confirmed by the improvements in the root structures and antioxidant system. This steroid stimulated the root structures, increasing the epidermis thickness (26%) and aerenchyma area (50%), resulting in higher protection of this tissue against Pb2+ ions. Additionally, EBR promoted significant increases in superoxide dismutase (26%), catalase (24%), ascorbate peroxidase (54%) and peroxidase (63%) enzymes, reducing oxidative stress on the photosynthetic machinery in Pb-stressed plants. This research proved that EBR mitigates the toxic effects generated by Pb in rice plants.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:280 |
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| Enthalten in: |
Environmental pollution (Barking, Essex : 1987) - 280(2021) vom: 01. Juli, Seite 116992 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Guedes, Flávia Raphaela Carvalho Miranda [VerfasserIn] |
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| Links: |
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| Themen: |
2P299V784P |
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| Anmerkungen: |
Date Completed 31.05.2021 Date Revised 31.05.2021 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.envpol.2021.116992 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM323403107 |
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| 100 | 1 | |a Guedes, Flávia Raphaela Carvalho Miranda |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Exogenous 24-Epibrassinolide stimulates root protection, and leaf antioxidant enzymes in lead stressed rice plants |b Central roles to minimize Pb content and oxidative stress |
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| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Copyright © 2021 Elsevier Ltd. All rights reserved. | ||
| 520 | |a Lead (Pb) is an environmental pollutant that negatively affects rice plants, causing damage to the root system and chloroplast structures, as well as reducing growth. 24-Epibrasnolide (EBR) is a plant growth regulator with a high capacity to modulate antioxidant metabolism. The objective of this research was to investigate whether exogenous EBR application can mitigate oxidative damage in Pb-stressed rice plants, measure anatomical structures and evaluate physiological and biochemical responses connected with redox metabolism. The experiment was randomized with four treatments, including two lead treatments (0 and 200 μM PbCl2, described as - Pb and + Pb, respectively) and two treatments with brassinosteroid (0 and 100 nM EBR, described as - EBR and + EBR, respectively). The results revealed that plants exposed to Pb suffered significant disturbances, but the EBR alleviated the negative interferences, as confirmed by the improvements in the root structures and antioxidant system. This steroid stimulated the root structures, increasing the epidermis thickness (26%) and aerenchyma area (50%), resulting in higher protection of this tissue against Pb2+ ions. Additionally, EBR promoted significant increases in superoxide dismutase (26%), catalase (24%), ascorbate peroxidase (54%) and peroxidase (63%) enzymes, reducing oxidative stress on the photosynthetic machinery in Pb-stressed plants. This research proved that EBR mitigates the toxic effects generated by Pb in rice plants | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Brassinosteroids | |
| 650 | 4 | |a Environmental pollutant | |
| 650 | 4 | |a Oryza sativa L. | |
| 650 | 4 | |a Redox status | |
| 650 | 4 | |a Root structures | |
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| 650 | 7 | |a Brassinosteroids |2 NLM | |
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| 650 | 7 | |a Lead |2 NLM | |
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| 650 | 7 | |a brassinolide |2 NLM | |
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| 700 | 1 | |a Silva, Breno Ricardo Serrão da |e verfasserin |4 aut | |
| 700 | 1 | |a Batista, Bruno Lemos |e verfasserin |4 aut | |
| 700 | 1 | |a Alyemeni, Mohammed Nasser |e verfasserin |4 aut | |
| 700 | 1 | |a Ahmad, Parvaiz |e verfasserin |4 aut | |
| 700 | 1 | |a Lobato, Allan Klynger da Silva |e verfasserin |4 aut | |
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