Journal
TREE PHYSIOLOGY
Volume 40, Issue 8, Pages 1126-1142Publisher
OXFORD UNIV PRESS
DOI: 10.1093/treephys/tpaa029
Keywords
accumulation and detoxification; AsA-GSH metabolism pathway; cadmium stress; comparative morphophysiology and transcriptome; Salix matsudana var. matsudana f. umbraculifera
Categories
Funding
- Zhejiang Science and Technology Major Program on Agricultural New Variety Breeding [2016C02056-1]
- National Nonprofit Institute Research Grant of Chinese Academy of Forestry [CAFYBB2017ZY007]
- National Transformation Science and Technology Program [2018ZX08020002-005-003]
- National Natural Science Foundation of China [31872168]
- Key Technologies R&D Program of Henan Province [182102310052]
Ask authors/readers for more resources
Salix matsudana Koidz is a low cadmium (Cd)-accumulating willow, whereas its cultivated variety, Salix matsudana var. matsudana f. umbraculifera Rehd., is a high Cd-accumulating and tolerant willow (HCW). The physiological and molecular mechanisms underlying differential Cd accumulation and tolerance in the two Salix species are poorly understood. Here, we confirmed that the differential Cd translocation capacity from roots to the shoots leads to the differential Cd accumulation in their aboveground parts between these two willow genotypes. Cadmium accumulation happens preferentially in the transport pathway, and Cd is mainly located in the vacuolar, cell wall and intercellular space in HCW bark by cadmium location analysis at tissue and subcellular levels. Comparative transcriptome analysis revealed that higher expressions of several metal transporter genes (ATP-binding cassette transporters, K+ transporters/channels, yellow stripe-like proteins, zinc-regulated transporter/iron-regulated transporter-like proteins, etc.) are involved in root uptake and translocation capacity in HCW; meanwhile, ascorbate-glutathione metabolic pathways play essential roles in Cd detoxification and higher tolerance of the Cd-accumulator HCW. These results lay the foundation for further understanding the molecular mechanisms of Cd accumulation in woody plants and provide new insights into molecular-assisted-screening woody plant varieties for phytoremediation.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available