%0 Journal Article
%T 超积累植物内生微生物群落组成特征及其功能研究进展
%A 罗继鹏
%A 陶琦
%A 吴可人
%A 李廷强
%J 浙江大学学报(农业与生命科学版)
%D 2018
%R 10.3785/j.issn.1008-9209.2017.09.208
%X 重金属超积累植物内生微生物通常能够耐受高浓度的重金属，并且群落组成因植物种类、土壤类型和污染 物种类不同而显著不同。内生微生物通过分泌植物生长素、改善营养状况、缓解乙烯胁迫及增强植物抵抗非生物 胁迫等过程促进宿主植物的生长。超积累植物内生微生物一方面可以通过分泌质子、低分子有机酸、铁载体、螯合 物或其他代谢产物来溶解或活化土壤重金属；另一方面通过促进根系的生长和菌根共生体的形成来提高对重金属的吸收；同时，内生微生物介导的氧化还原、生物吸附和生物积累等过程也会影响植物对重金属的吸收和积累。在应用方面，超积累植物内生微生物在强化植物修复、提高作物产量及微量元素生物强化等方面表现出良好的应用前景。本文综述了超积累植物内生微生物的群落组成及演替规律、对植物的促生机制、对重金属活化和吸收的影响机制及其在农业生产中的应用等，并在此基础上提出了今后的研究重点。 通讯作者: 李廷强（https://orcid.org/0000-0003-4448-4871） E-mail: litq@zju.edu.cn</br>Abstract: The endophytic microbiota of hyperaccumulators is capable of tolerating high concentration of heavy metals, and its composition and diversity markedly vary with host plant species, soil and pollutant types, etc. Hyperaccumulator-associated endophytic microbiota has been reported to promote host plant growth by producing phytohormones, inhibiting ethylene production, increasing macro and micro nutrients and enhancing plant’s resistance to abiotic stress. On the one hand, endophytic microbiota can increase solubility and bioavailability of heavy metals by releasing of protons, carboxylic acid anions, bacterial siderophores and other chelators. On the other hand, the promotion of root growth and the formation of symbiosis mycorrhizae can increase the uptake of heavy metals by root. In addition, other processes such as redox, biosorption and bioaccumulation mediated by endophytic microbiota can also influence the uptake of heavy metals. In terms of application, endogenous microorganism of hyperaccumulator has good application prospects in strengthening phytoremediation, improving crop yield and biofortification of trace elements. In this paper, we reviewed the community composition and succession rule of endophytic microorganism in hyperaccumulator, as well as the mechanism of promoting plant growth, heavy metal activation and uptake, and its application in agricultural production. Based on that, the future research emphasis is put forward. Key words: hyperaccumulator phytoremediation endogenous microorganism heavy metal biofortification
%U http://www.zjujournals.com/agr/CN/10.3785/j.issn.1008-9209.2017.09.208