Role of Boron in Vascular Plants and Response Mechanisms to Boron Stresses-猫眼课题宝

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2010

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M. B. Herrera-Rodriguez;A. González-Fontes;J. Rexach;J. J. Camacho-Cristóbal-J.;J. Maldonado;M. Navarro-Gochicoa

迄今为止，硼的主要功能是其在细胞壁中的结构作用，通过稳定含有顺式二醇基团的分子（鼠李糖半乳糖酸II的apiose残基硼酸酯）。然而，硼作为一种微量元素，在维管植物中也参与了多种生理过程。然而，缺硼引起的各种代谢紊乱的机制确实是未知的。最近有报道称缺硼和毒性诱导应激反应基因。本文综述了硼在维管束植物中的吸收和分布机制、硼在维管束植物中的作用、缺硼对维管束植物的影响以及硼毒性与盐胁迫的相互作用。此外，我们还讨论了最近提出的从机理角度解释硼如何在维管植物中发挥作用的假设。了解硼在植物中的作用及其对缺硼和毒性的反应机制将有助于我们提高作物对硼胁迫的耐受性。_____________________________________________________________________________________________________________

To date, the primordial function of boron is its structural role in the cell wall through stabilization of molecules containing cis-diol groups (borate esters with apiose residues of rhamnogalacturonan II). Nonetheless, boron is a micronutrient also involved in a great variety of physiological processes in vascular plants. However the mechanisms underlying the various metabolic disorders caused by boron deficiency are indeed unknown. Recently it has been reported that boron deficiency and toxicity induce stress-responsive genes. In this contribution we review the mechanisms involved in boron uptake and distribution, the role of boron in vascular plants, the effects of boron deficiency and toxicity on them, as well as the interaction boron toxicity and salt stress. In addition, we discuss the most recent hypotheses proposed to explain how boron could exert its function in vascular plants from a mechanistic point of view. The importance of understanding the role of boron in plants as well as the response mechanisms to its deficiency and toxicity will allow us to improve the tolerance of crops to boron stresses. _____________________________________________________________________________________________________________

Role of Boron in Vascular Plants and Response Mechanisms to Boron Stresses

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