Photochemical and antioxidant behavior of rice in response to water deficit
The effects of water deficit on photochemical parameters and activities of superoxide dismutase (SOD), catalase (CAT), peroxidase (POD) were investigated in two cultivars of rice. The soil water content fell to about 40% of field water capacity after withholding irrigation for 14 d. As a result, the...
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| Language: | English |
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Zhejiang University Press
2004-05-01
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| Series: | 浙江大学学报. 农业与生命科学版 |
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| Online Access: | https://www.academax.com/doi/10.3785/1008-9209.2004.03.0278 |
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| author | SUN Jun-wei YANG Yong JIANG De-an |
| author_facet | SUN Jun-wei YANG Yong JIANG De-an |
| author_sort | SUN Jun-wei |
| collection | DOAJ |
| description | The effects of water deficit on photochemical parameters and activities of superoxide dismutase (SOD), catalase (CAT), peroxidase (POD) were investigated in two cultivars of rice. The soil water content fell to about 40% of field water capacity after withholding irrigation for 14 d. As a result, the net photosynthetic rate (Pn) was significantly depressed in both cultivars. The maximum photochemical efficiency (F<sub>v</sub>/F<sub>m</sub>) remained unchanged. The photochemical quenching coefficient (qP) and the actual quantum yield of electron transport rate of PS Ⅱ (Φ<sub>PSⅡ</sub>) in cultivar IR 1552 were not different between plants under water deficient condition and the irrigated control, but their SOD, CAT and POD activities of the drought-stressed plants were significantly higher.. However, those photochemical parameters in cultivar Azucena were significantly lower after withholding irrigation and all antioxidant enzyme activities decreased. The results indicated that there was different response to water stress between two rice cultivars. |
| format | Article |
| id | doaj-art-5d3beda85b33411c8cf4d6ba7154b96c |
| institution | Kabale University |
| issn | 1008-9209 2097-5155 |
| language | English |
| publishDate | 2004-05-01 |
| publisher | Zhejiang University Press |
| record_format | Article |
| series | 浙江大学学报. 农业与生命科学版 |
| spelling | doaj-art-5d3beda85b33411c8cf4d6ba7154b96c2025-08-20T03:58:14ZengZhejiang University Press浙江大学学报. 农业与生命科学版1008-92092097-51552004-05-013027828410.3785/1008-9209.2004.03.027810089209Photochemical and antioxidant behavior of rice in response to water deficitSUN Jun-weiYANG YongJIANG De-anThe effects of water deficit on photochemical parameters and activities of superoxide dismutase (SOD), catalase (CAT), peroxidase (POD) were investigated in two cultivars of rice. The soil water content fell to about 40% of field water capacity after withholding irrigation for 14 d. As a result, the net photosynthetic rate (Pn) was significantly depressed in both cultivars. The maximum photochemical efficiency (F<sub>v</sub>/F<sub>m</sub>) remained unchanged. The photochemical quenching coefficient (qP) and the actual quantum yield of electron transport rate of PS Ⅱ (Φ<sub>PSⅡ</sub>) in cultivar IR 1552 were not different between plants under water deficient condition and the irrigated control, but their SOD, CAT and POD activities of the drought-stressed plants were significantly higher.. However, those photochemical parameters in cultivar Azucena were significantly lower after withholding irrigation and all antioxidant enzyme activities decreased. The results indicated that there was different response to water stress between two rice cultivars.https://www.academax.com/doi/10.3785/1008-9209.2004.03.0278ricewater deficitPnchlorophyll fluorescenceantioxidant enzyme |
| spellingShingle | SUN Jun-wei YANG Yong JIANG De-an Photochemical and antioxidant behavior of rice in response to water deficit 浙江大学学报. 农业与生命科学版 rice water deficit Pn chlorophyll fluorescence antioxidant enzyme |
| title | Photochemical and antioxidant behavior of rice in response to water deficit |
| title_full | Photochemical and antioxidant behavior of rice in response to water deficit |
| title_fullStr | Photochemical and antioxidant behavior of rice in response to water deficit |
| title_full_unstemmed | Photochemical and antioxidant behavior of rice in response to water deficit |
| title_short | Photochemical and antioxidant behavior of rice in response to water deficit |
| title_sort | photochemical and antioxidant behavior of rice in response to water deficit |
| topic | rice water deficit Pn chlorophyll fluorescence antioxidant enzyme |
| url | https://www.academax.com/doi/10.3785/1008-9209.2004.03.0278 |
| work_keys_str_mv | AT sunjunwei photochemicalandantioxidantbehaviorofriceinresponsetowaterdeficit AT yangyong photochemicalandantioxidantbehaviorofriceinresponsetowaterdeficit AT jiangdean photochemicalandantioxidantbehaviorofriceinresponsetowaterdeficit |