Abstract
BACKGROUND: Salix matsudana Koidz. is a fast growing tree species. It has a high cadmium (Cd) tolerance capacity, making it potentially suitable for phytoremediation. Presently, transcriptomic and physiological Cd response mechanisms are poorly understood. Transcriptomic analysis in early response to high (50 μM) Cd levels was investigated in leaf and root of Cd-resistant S. matsudana Koidz.. RESULTS: Analysis of the response profiles demonstrate the existence of a complex transcriptional network in the root and leaf when exposed to Cd. The main response in the root involved up-regulation of genes associated with defence response via callose deposition in the cell wall and cell wall thickening. In the leaf, transcripts related to biotic stress signalling and secondary metabolism were activated. Additionally, many lignin and brassinosteroids synthesis pathway genes were induced mainly in the leaf, indicating that gene response to Cd was tissue-specific. The Cd transcriptome results were consistent with observed physiological changes. CONCLUSION: The sub-localization, transcriptional network, and physiological regulation demonstrate the tissue-specific manner of Cd response, and provide a novel insight into in early response of tree species to Cd exposure.
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Claims 5
Claim · model-written summary
Cadmium exposure produced a complex root and leaf transcriptional network.
- Taxon
- Salix matsudana Koidz.
Salix matsudanae1 - Organ / stage
- root and leafe0
- Treatment
- Cde0
- Outcome
- complex transcriptional networke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a complex transcriptional network in the root and leaf when exposed to Cd”
e1“Salix matsudana Koidz.”
Claim · model-written summary
Root genes for defence through callose deposition and cell wall thickening were upregulated.
- Taxon
- Salix matsudana Koidz.Salix matsudanae1
- Organ / stage
- roote0
- Outcome
- genes associated with defence response via callose deposition in the cell wall and cell wall thickeninge0
- Direction
- up-regulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The main response in the root involved up-regulation of genes associated with defence response via callose deposition in the cell wall and cell wall thickening”
e1“Salix matsudana Koidz.”
Claim · model-written summary
Leaf transcripts related to biotic stress signalling and secondary metabolism were activated.
- Taxon
- Salix matsudana Koidz.Salix matsudanae1
- Organ / stage
- leafe0
- Outcome
- transcripts related to biotic stress signalling and secondary metabolisme0
- Direction
- activatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the leaf, transcripts related to biotic stress signalling and secondary metabolism were activated”
e1“Salix matsudana Koidz.”
Claim · model-written summary
Many lignin and brassinosteroid synthesis genes were induced mainly in leaves.
- Taxon
- Salix matsudana Koidz.Salix matsudanae1
- Organ / stage
- leafe0
- Outcome
- lignin and brassinosteroids synthesis pathway genese0
- Direction
- inducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“many lignin and brassinosteroids synthesis pathway genes were induced mainly in the leaf”
e1“Salix matsudana Koidz.”
Claim · model-written summary
Cadmium transcriptome results agreed with observed physiological changes.
- Taxon
- Salix matsudana Koidz.Salix matsudanae1
- Treatment
- Cde0
- Outcome
- Cd transcriptome resultse0
- Qualifier
- consistent with observed physiological changese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Cd transcriptome results were consistent with observed physiological changes”
e1“Salix matsudana Koidz.”