【摘要】 研究揭示了水稻磷酸盐转运蛋白编码基因的表达.低磷处理下,根系与叶片中的PTW J转录子迅速表达,处理7d时达到最高表达量.PTW JmRNA的诱导积累具有元素的专一性,因为在缺氮、缺钾与缺铁情况下此基因不表达.缺磷处理后恢复供磷,PTW J转录子积累量明显降低.这些结果说明,PTW J基因表达是对磷素缺乏的早期反应机制.更多还原

【Abstract】 High affinity phosphate transporter plays an important role in plant adapting to low phosphorus (Pi) stress. In this study, the expression of the PTWJ was characterized: the PTWJ transcripts were highly induced in roots and leaves during Pi starvation, a significant increase in the PTWJ mRNA was observed after 7 d of Pi starvation. Induction of the PTWJ mRNA appeared to be a response specific to Pi starvation. The amount of PTWJ transcript decreased rapidly when Pistarved rice plants were resupplied with Pi. The results suggested that PTWJ gene expression may be a part of the early Pi starvation response mechanism in plants.更多还原