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한국식물학회 / v.53, no.6, 2010년, pp.444-452 
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( Overexpression of OsVP1 and OsNHX1 Increases Tolerance to Drought and Salinity in Rice ) |
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| 초 록 |
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| Drought and salinity are major abiotic stresses affecting rice production. To improve plant tolerance to salinity and drought, we overexpressed rice $Na^+/H^+$ exchangers (OsNHX1) and $H^+$-pyrophosphatase in tonoplasts (OsVP1) in a japonica elite rice cultivar, Zhonghua 11. Compared with our wild-type control, transgenic plants overexpressing both genes incurred less damage when exposed to long-term treatment with 100 mM NaCl or water deprivation. Under high-saline condition, the transformants accumulated less $Na^+$ and malondialdehyde in the leaves, thereby allowing the plants to maintain a low level of leaf water potential and reduce stress-induced damage. Those transgenics also had higher photosynthetic activity during the stress period. Under those conditions, they also showed an increase in root biomass, which enabled more water uptake. These results suggest that OsVP1 and OsNHX1 improve the tolerance of rice crops against drought and salt by employing multiple strategies in addition to osmotic regulation. |
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| 키워드 |
| Drought tolerance;$H^+$- pyrophosphatase;Osmotic potential;Salt tolerance;Tonoplast;Transgenic rice (Oryza sativa);Vacuolar $Na^+/H^+$ exchanger; |
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Journal of Plant Biology / v.53, no.6, 2010년, pp.444-452
한국식물학회
ISSN : 1226-9239
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201020733094691)
언어 : 영어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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