title: [Heavy metal absorption, transportation and accumulation mechanisms in hyperaccumulator Thlaspi caerulescens].
abstract: Thlaspi caerulescens, the famous model plant of heavy-metal hyperaccumulator, can uptake and accumulate large amount of heavy metals in its above-ground part of the plants. However, the very low biomass in Thlaspi caerulescens makes this plant unfit for direct application in phytoremediation. In recent years, there are many reports about the physiological and molecular characterization of Thlaspi caerulescens under heavy metals stresses, including absorption, transport and intracellular detoxification processes (e.g., chelation and compartmentation). Research teams have conducted many studies of chelators in plants, such as organ acid, amino acid, phytochelatins, metallothioneins and nicotianamine, and so on. Several transport protein families, such as Zinc Regulated Protein, Cation Diffusion Facilitator, Natural Resistance and Macrophage Protein and Heavy Metal ATPase, play important role in short/long distance transport in the plant. In this review, we summarize the current knowledge of the physiological and molecular mechanisms of heavy metals accumulation in Thlaspi caerulescens, with particular emphasis on the roles of transporters and chelatins in modulating plant heave-metal-stress responses.
authors.affiliation: College of Life Science, Graduate University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Geyu
authors.initials: G
authors.lastname: Liu
authors.forename: Tuanyao
authors.initials: T
authors.lastname: Chai
authors.forename: Tao
authors.initials: T
authors.lastname: Sun
mesh_terms: D000042:Absorption; D001383:Azetidinecarboxylic Acid / Q000031:analogs & derivatives / Q000378:metabolism; D001673:Biodegradation, Environmental; D027682:Cation Transport Proteins / Q000235:genetics / Q000378:metabolism*; D008667:Metalloproteins / Q000235:genetics / Q000378:metabolism*; D019216:Metals, Heavy / Q000378:metabolism*; D054811:Phytochelatins / Q000235:genetics / Q000378:metabolism; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism*; D031227:Thlaspi / Q000235:genetics / Q000378:metabolism*
chemical_list: D027682:Cation Transport Proteins; D008667:Metalloproteins; D019216:Metals, Heavy; D010940:Plant Proteins; C408070:ZNT1 zinc transporter, Thlaspi caerulescens; C082893:nicotianamine; D001383:Azetidinecarboxylic Acid; D054811:Phytochelatins