植物硒转运蛋白的研究进展

硒是哺乳动物、细菌等许多生物的必需微量元素,也是植物生长发育的有益元素。植物主要吸收土壤中的硒酸盐和亚硒酸盐,经进一步代谢成为人类所需硒的直接或间接来源。研究表明,植物主要利用硫酸盐转运蛋白吸收硒酸盐,而吸收亚硒酸盐的方式还不太清楚。最近的研究结果发现,水孔蛋白及阴离子通道蛋白等参与亚硒酸盐的吸收,且受到多种因素调控,如呼吸抑制剂、代谢抑制剂、pH值、硝酸盐、磷酸盐及谷胱甘肽等。对近几年植物硒转运蛋白的研究结果进行了总结,并对未来的研究方向进行了展望。

Research Progresses on Plant Selenium Transport Protein

Selenium(Se),an essential micronutrient for animals and microorganisms,is a helpful nutrient for growth and development ofmany plants.Selenate and selenite could be absorbed from soil and assimilated by plants to form direct or indirect selenium resources for humans.It has been found that sulfate transport protein is the main pathway for plants to absorb selenate,but that involved in selenite absorption are still elusive.Recent studies indicated that aquaporins and anion channel proteins involved in selenite absorption,and selenite accumulation was regulated by a number of factors like the value of pH,glutathione,nitrate,and inhibitors for respiration and metabolism.Here,key development of plant selenium transporters and prospects for future research directions were reviewed.