OsPTF1, a novel transcription factor involved in tolerance to phosphate starvation in rice

文献类型： 外文期刊

第一作者： Yi, KK

作者： Yi, KK;Wu, ZC;Zhou, J;Du, LM;Guo, LB;Wu, YR;Wu, P

作者机构：

关键词： HIGHER-PLANTS;PHOSPHORUS DEFICIENCY;GENOME EXPRESSION;ARABIDOPSIS;AVAILABILITY;TRANSPORT;PROTEIN;ROOTS;GENES;SOIL

期刊名称：PLANT PHYSIOLOGY （ 影响因子：8.34； 五年影响因子：8.972 ）

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年卷期：

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收录情况： SCI

摘要： We report here on a novel transcription factor with a basic helix-loop-helix domain for tolerance to inorganic phosphate ( Pi) starvation in rice ( Oryza sativa). The gene is designated OsPTF1. The expression of OsPTF1 is Pi starvation induced in roots while constitutively expressed in shoots, as shown by northern-blot analysis. Overexpression of OsPTF1 enhanced tolerance to Pi starvation in transgenic rice. Tillering ability, root and shoot biomass, and phosphorus content of transgenic rice plants were about 30% higher than those of the wild-type plants in Pi-deficient conditions in hydroponic experiments. In soil pot and field experiments, more than 20% increase in tiller number, panicle weight, and phosphorus content was observed in transgenic plants compared to wild- type plants at low-Pi levels. In Pi-deficient conditions, transgenic rice plants showed significantly higher total root length and root surface area, which results in a higher instantaneous Pi uptake rate over their wild- type counterparts. Microarray analysis for transgenic plants overexpressing OsPTF1 has been performed to investigate the downstream regulation of OsPTF1.

分类号： Q945

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