Departamento de Fisiología, Anatomía y Biología Celular, Universidad Pablo de Olavide, E-41013 Sevilla, Spain.
Plant Sci. 2011 Aug;181(2):85-9. doi: 10.1016/j.plantsci.2011.05.001. Epub 2011 May 11.
Boron (B) is an essential element for plant growth whose deficiency causes an alteration in the expression of a wide range of genes involved in several physiological processes. However, our understanding of the signal transduction pathways that trigger the B-deficiency responses in plants is still poor. The aims of this review are (i) to summarize the genes whose transcript levels are affected by B deficiency and (ii) to provide an update on recent findings that could help to understand how the signal(s) triggered by B deficiency is transferred to the nucleus to modulate gene expression. In this contribution we review the effects of B deficiency on the transcript level of genes related to B uptake and translocation, maintenance of cell wall and membrane function, nitrogen assimilation and stress response. In addition, we discuss the possible mediation of calcium, arabinogalactan-proteins and other cis-diol containing compounds in the signaling mechanisms that transfer the signal of B deficiency to nuclei. Finally, we conclude that the advance in the knowledge of the molecular basis of B deficiency response in plants will allow improving the tolerance of crops to B deficiency stress.
硼（B）是植物生长所必需的元素，其缺乏会导致参与多种生理过程的广泛基因的表达发生改变。然而，我们对触发植物 B 缺乏响应的信号转导途径的理解仍然很差。本篇综述的目的是：(i) 总结转录水平受 B 缺乏影响的基因；(ii) 提供最新的发现，以帮助理解由 B 缺乏触发的信号如何传递到核中来调节基因表达。在这篇综述中，我们讨论了 B 缺乏对与 B 吸收和转运、细胞壁和膜功能维持、氮同化和应激反应相关的基因转录水平的影响。此外，我们还讨论了钙、阿拉伯半乳聚糖蛋白和其他含有顺式二醇的化合物在将 B 缺乏信号传递到核中的信号转导机制中的可能介导作用。最后，我们得出结论，对植物 B 缺乏响应的分子基础的深入了解将有助于提高作物对 B 缺乏胁迫的耐受性。
