文献类型：期刊文献

英文题名：Heavy metal accumulation and signal transduction in herbaceous and woody plants: Paving the way for enhancing phytoremediation efficiency

作者：Luo, Zhi-Bin[1] He, Jiali[2] Polle, Andrea[3] Rennenberg, Heinz[4]

第一作者：罗志斌

通信作者：Luo, ZB[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, State Forestry Adm, State Key Lab Tree Genet & Breeding,Key Lab Silvi, Beijing 100091, Peoples R China;[2]Shenyang Agr Univ, Dept Hort, Shenyang 110866, Peoples R China;[3]Univ Gottingen, Dept Forest Bot & Tree Physiol, Busgen Inst, Busgenweg 2, D-37077 Gottingen, Germany;[4]Univ Freiburg, Inst Forest Sci, Georges Koehler Allee,Geb 53-54, D-79085 Freiburg, Germany

年份：2016

卷号：34

期号：6

起止页码：1131-1148

外文期刊名：BIOTECHNOLOGY ADVANCES

收录：;EI(收录号：20164102887030);Scopus(收录号：2-s2.0-84989808253);WOS:【SCI-EXPANDED(收录号:WOS:000383295800005)】；

基金：This work was financially supported by the Special Fund on Essential Research for National Non-profit Institutions to the Chinese Academy of Forestry (grant no. CAFYBB2014ZX001-2), and the National Natural Science Foundation of China (grant nos. 31100481, 31270647, 31470618, 31501712). Research conducted in the laboratory of Prof. Andrea Polle and Prof. Heinz Rennenberg was supported by the Bundesministerium fur Forschung and Technology (BMBF).

语种：英文

外文关键词：Abscisic acid; Cadmium; Hydrogen sulfide; Jasmonic acid; Nitric oxide; Reactive oxygen species; Salicylic acid; Signaling; Transgenics; Zinc

摘要：Heavy metal (HM)-accumulating herbaceous and woody plants are employed for phytoremediation. To develop improved strategies for enhancing phytoremediation efficiency, knowledge of the microstructural, physiological and molecular responses underlying HM-accumulation is required. Here we review the progress in understanding the structural, physiological and molecular mechanisms underlying HM uptake, transport, sequestration and detoxification, as well as the regulation of these processes by signal transduction in response to HM exposure. The significance of genetic engineering for enhancing phytoremediation efficiency is also discussed. In herbaceous plants, HMs are taken up by roots and transported into the root cells via transmembrane carriers for nutritional ions. The HMs absorbed by root cells can be further translocated to the xylem vessels and unloaded into the xylem sap, thereby reaching the aerial parts of plants. HMs can be sequestered in the cell walls, vacuoles and the Golgi apparatuses. Plant roots initially perceive HM stress and trigger the signal transduction, thereby mediating changes at the molecular, physiological, and microstructural level. Signaling molecules such as phytohormones, reactive oxygen species (ROS) and nitric oxide (NO), modulate plant responses to HMs via differentially expressed genes, activation of the antioxidative system and coordinated cross talk among different signaling molecules. A number of genes participated in HM uptake, transport, sequestration and detoxification have been functionally characterized and transformed to target plants for enhancing phytoremediation efficiency. Fast growing woody plants hold an advantage over herbaceous plants for phytoremediation in terms of accumulation of high HM-amounts in their large biomass. Presumably, woody plants accumulate HMs using similar mechanisms as herbaceous counterparts, but the processes of HM accumulation and signal transduction can be more complex in woody plants. (C) 2016 Elsevier Inc. All rights reserved.