Exogenous $ Ca^{2+} $ enhances antioxidant defense in rice to simulated acid rain by regulating ascorbate peroxidase and glutathione reductase
Main conclusion Exogenous calcium enhances rice tolerance to acid rain stress by regulating isozymes composition and transcriptional expression of ascorbate peroxidase and glutathione reductase. Abstract Calcium (Ca) participates in signal transduction in plants under abiotic stress, and addition of $ Ca^{2+} $ is beneficial to alleviate damage of plants caused by acid rain. To clarify the effect of exogenous $ Ca^{2+} $ on tolerance of plants to acid rain stress, we investigated regulation of $ Ca^{2+} $ (5 mM) on activities, isozymes composition and transcriptional expression of ascorbate peroxidase (APX) and glutathione reductase (GR), redox state, and $ H_{2} $$ O_{2} $ concentration and growth in rice leaves and roots under simulated acid rain (SAR) stress. SAR (pH 3.5/2.5) decreased the total activities of APX and GR in rice by decreasing the concentration of APX isoforms (APXII in leaves and APXIII in roots) as well as activation degree of GR isozymes and transcription level of GR1, indicating that SAR (pH 3.5/2.5) destroyed the redox state in rice cells and induced $ H_{2} $$ O_{2} $ excessive accumulation, and inhibited growth of rice. Exogenous $ Ca^{2+} $ alleviated SAR-induced inhibition on activities of APX and GR by regulating the concentration, activation, and transcription of their isozymes, and then maintained the redox level of cells and protected cells from oxidative damage, being beneficial to the growth of rice. Therefore, the promotion of exogenous $ Ca^{2+} $ on activities of APX and GR can be important to enhance rice tolerance to acid rain by maintaining redox state and avoiding oxidative damage..
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:254 |
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| Enthalten in: |
Planta - 254(2021), 2 vom: 29. Juli |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Ma, Yongjia [VerfasserIn] |
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| Links: |
Volltext [lizenzpflichtig] |
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| BKL: | |
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| Themen: |
Ascorbate peroxidase |
| RVK: |
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| Anmerkungen: |
© The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2021 |
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| doi: |
10.1007/s00425-021-03679-0 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
OLC2126929272 |
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| 245 | 1 | 0 | |a Exogenous $ Ca^{2+} $ enhances antioxidant defense in rice to simulated acid rain by regulating ascorbate peroxidase and glutathione reductase |
| 264 | 1 | |c 2021 | |
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| 520 | |a Main conclusion Exogenous calcium enhances rice tolerance to acid rain stress by regulating isozymes composition and transcriptional expression of ascorbate peroxidase and glutathione reductase. Abstract Calcium (Ca) participates in signal transduction in plants under abiotic stress, and addition of $ Ca^{2+} $ is beneficial to alleviate damage of plants caused by acid rain. To clarify the effect of exogenous $ Ca^{2+} $ on tolerance of plants to acid rain stress, we investigated regulation of $ Ca^{2+} $ (5 mM) on activities, isozymes composition and transcriptional expression of ascorbate peroxidase (APX) and glutathione reductase (GR), redox state, and $ H_{2} $$ O_{2} $ concentration and growth in rice leaves and roots under simulated acid rain (SAR) stress. SAR (pH 3.5/2.5) decreased the total activities of APX and GR in rice by decreasing the concentration of APX isoforms (APXII in leaves and APXIII in roots) as well as activation degree of GR isozymes and transcription level of GR1, indicating that SAR (pH 3.5/2.5) destroyed the redox state in rice cells and induced $ H_{2} $$ O_{2} $ excessive accumulation, and inhibited growth of rice. Exogenous $ Ca^{2+} $ alleviated SAR-induced inhibition on activities of APX and GR by regulating the concentration, activation, and transcription of their isozymes, and then maintained the redox level of cells and protected cells from oxidative damage, being beneficial to the growth of rice. Therefore, the promotion of exogenous $ Ca^{2+} $ on activities of APX and GR can be important to enhance rice tolerance to acid rain by maintaining redox state and avoiding oxidative damage. | ||
| 650 | 4 | |a Ascorbate peroxidase | |
| 650 | 4 | |a Exogenous Ca | |
| 650 | 4 | |a Glutathione reductase | |
| 650 | 4 | |a Oxidative stress | |
| 650 | 4 | |a Redox state | |
| 650 | 4 | |a Simulated acid rain | |
| 700 | 1 | |a Ren, Xiaoqian |4 aut | |
| 700 | 1 | |a Liang, Chanjuan |0 (orcid)0000-0001-7704-4309 |4 aut | |
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