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Overexpression of an F-box Protein Gene Reduces Abiotic Stress Tolerance and Promotes Root Growth in Rice 被引量:16

Overexpression of an F-box Protein Gene Reduces Abiotic Stress Tolerance and Promotes Root Growth in Rice
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摘要 As one of the largest gene families, F-box domain proteins have important roles in regulating various devel- opmental processes and stress responses. In this study, we have investigated a rice F-box domain gene, MAIF1. The MAIF1 protein is mainly localized in the plasma membrane and nucleus. MAIF1 expression is induced rapidly and strongly by abscisic acid (ABA) and abiotic stresses. MAIF1 expression is also induced in root tips by sucrose, independent of its hy- drolytic hexose products, glucose and fructose, and the plant hormones auxin and cytokinin. Overexpression of MAIF1 reduces rice ABA sensitivity and abiotic stress tolerance and promotes rice root growth. These results suggest that MAIF1 is involved in multiple signaling pathways in regulating root growth. Growth restraint in plants is an acclimatization strategy against abiotic stress, Our results also suggest that MAIF1 plays the negative role in response to abiotic stress possibly by regulating root growth. As one of the largest gene families, F-box domain proteins have important roles in regulating various devel- opmental processes and stress responses. In this study, we have investigated a rice F-box domain gene, MAIF1. The MAIF1 protein is mainly localized in the plasma membrane and nucleus. MAIF1 expression is induced rapidly and strongly by abscisic acid (ABA) and abiotic stresses. MAIF1 expression is also induced in root tips by sucrose, independent of its hy- drolytic hexose products, glucose and fructose, and the plant hormones auxin and cytokinin. Overexpression of MAIF1 reduces rice ABA sensitivity and abiotic stress tolerance and promotes rice root growth. These results suggest that MAIF1 is involved in multiple signaling pathways in regulating root growth. Growth restraint in plants is an acclimatization strategy against abiotic stress, Our results also suggest that MAIF1 plays the negative role in response to abiotic stress possibly by regulating root growth.
出处 《Molecular Plant》 SCIE CAS CSCD 2011年第1期190-197,共8页 分子植物(英文版)
关键词 Rice (Oryza sativa L.) F-box domain abscisic acid abiotic stress tolerance root growth. Rice (Oryza sativa L.) F-box domain abscisic acid abiotic stress tolerance root growth.
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