| Responses of the key enzymes involved in proline metabolism in rice seedling under water stress |
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| DOI：10.7606/j.issn.1000-7601.2011.03.15 |
| Key Words: water stress proline △1-pryroline-5-carboxylate synthetase (P5CS) orithine-δ-aminotransferase (δ-OAT) proline dehydrogenase(ProDH) |
| Author Name | Affiliation | | ZHAO Guilin | College of Chemical and Life Sciences, Shenyang Normal University, Shenyang 110034,China | | CHEN Qiang | College of Chemical and Life Sciences, Shenyang Normal University, Shenyang 110034,China | | HU Guoxia | College of Chemical and Life Sciences, Shenyang Normal University, Shenyang 110034,China | | CHU Yan | College of Chemical and Life Sciences, Shenyang Normal University, Shenyang 110034,China | | MA Lianju | College of Chemical and Life Sciences, Shenyang Normal University, Shenyang 110034,China | | LI Xuemei | College of Chemical and Life Sciences, Shenyang Normal University, Shenyang 110034,China |
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| Abstract: |
| Using rice seedlings at two-leaf stage as tested materials, the free proline content and activities of en-zymes involved in proline metabolism were studied under water stress induced by 15%PEG. The results showed that the proline content increased obviously under stress, reached the maximum after 24 h and then decreased. The activities of △1-pyroline-5-carboxylate synthetase (P5CS ) and ornithine- δ-aminotransferase (δ-0AT)， the key enzymes of proline accumulation, increased sigificantly and then declined; while the activity of proline dehydrogenase (ProDH)， a key en-zyme of proline degradation, declined significantly and then increased. |
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