文档介绍：摘要
缺磷是限制植物生长、发育和繁殖的一个主要因素。在自然条件和农业生产中,植物往往在低溶性磷的土壤中生长。而植物可以通过增强土壤中营养的吸收以维持植物的生长、发育和代谢活动,以适应这种缺磷的环境。全面了解植物如何感知磷酸的缺乏并进行调节的,复杂的交互调节成为研究的热门。现已有一些关于磷酸缺乏应答的信号扮演者和信号系统的研究出现。新出现的研究数据证明复杂的交互调节阻碍了植物对Pi的利用,如缺磷时信号系统对激素、光合同化物(糖)和离子如铁的调节。本综述侧重于交互调节和缺磷反应的信号扮演者如SPX域蛋白。
关键词:磷;信号;spx;Fe;激素
In Plants ic Analysis Progress of Pi-Starvation
ABSTRACT
Phosphate (Pi) availability is a major factor limiting growth, development, and productivity of plants. In both ecological and agricultural contexts, plants often grow in soils with low soluble phosphate content. Plants respond to this situation by a series of developmental and metabolic adaptations that are aimed at increasing the acquisition of this vital nutrient fromthe soil, as well as to sustain plant growth and survival. The development of prehensive understanding of how plants sense phosphate deficiency and coordinate the responses via signaling pathways has e of major interest, and a number of signaling players works have begun to surface for the regulation of the phosphate deficiency response. In practice, application of such knowledge to improve plant Pi nutrition is hindered plex cross-talks, which are emerging in the face of new data, such as the coordination of the phosphate-deficiency works with those involved with hormones, photo-assimilates (sugar), as well as with the homeostasis of other ions,such as iron. In this review, we focus on these cross-talks and on recent progress in discovering new signaling players involved in the Pi-starvation responses, such as proteins having SPX domains.
Key words: Phosphate; signaling; SPX; iron; phytohormones.
正文:
一般植物的生长和繁殖都依赖器官对磷酸的利用。然而,许多自然和农业生态系统中,可利用的流动性磷酸的含量是十分低。为应付磷限制,植物进化出了维持磷动态平衡的机制,其中包含从土壤中获取磷酸、贮存、活化和对磷酸的有效利用(Poirier and Bucher, 2002)。基因芯片表达普(Calderon-Vazquez et al., 2008; Hammond et al., 2003; Misson et al., 2005; Morcuende et al., 2007; Uhde-Stone et al., 2003;Wu et al., 2003)、蛋白质组学方法(Li et al., 2008, 2007)、代谢产物分析(Morcuende et al., 2007)的研究显示植物会逐步形成适宜的新陈代谢方式和遗传变异。然而关于植