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@ARTICLE{Andresen:166437,
author = {Andresen, Elisa and Mattusch, Jürgen and Wellenreuther,
Gerd and Thomas, George and Abad, Uriel A. and Kuepper,
Hendrik},
title = {{D}ifferent strategies of cadmium detoxification in the
submerged macrophyte {C}eratophyllum demersum {L}.},
journal = {Metallomics},
volume = {5},
number = {10},
issn = {1756-5901},
address = {Cambridge},
publisher = {RSC Publ.},
reportid = {DESY-2014-01341},
pages = {1377-1386},
year = {2013},
note = {(c) The Royal Society of Chemistry; Post referee fulltext
in progress; Embargo 12 months from publication},
abstract = {The heavy metal cadmium (Cd) is highly toxic to plants. To
understand the mechanisms of tolerance and resistance to Cd,
we treated the rootless, submerged macrophyte Ceratophyllum
demersum L. with sub-micromolar concentrations of Cd under
environmentally relevant conditions. X-ray fluorescence
measurements revealed changing distribution patterns of Cd
and Zn at non-toxic (0.2 nM, 2 nM), moderately toxic (20 nM)
and highly toxic (200 nM) levels of Cd. Increasing Cd
concentrations led to enhanced sequestration of Cd into
non-photosynthetic tissues like epidermis and vein. At toxic
Cd concentrations, Zn was redistributed and mainly found in
the vein. Cd treatment induced the synthesis of
phytochelatins (PCs) in the plants, with a threshold of
induction already at 20 nM Cd for PC3. In comparison, in
plants treated with Cu, elevated PC levels were detected
only at the highest concentrations (100–200 nM Cu). Our
results show that also non-accumulators like C. demersum
store toxic metals in tissues where the heavy metal
interferes least with metabolic pathways, but remaining
toxicity interferes with micronutrient distribution.
Furthermore, we found that the induction of phytochelatins
is not proportional to metal concentration, but has a
distinct threshold, specific for each PC species. Finally we
could show that 20 nM Cd, which was previously regarded as
non-toxic to most plants, already induces detoxifying
mechanisms.},
cin = {DOOR / FS-DO},
ddc = {690},
cid = {I:(DE-H253)HAS-User-20120731 / I:(DE-H253)FS-DO-20120731},
pnm = {DORIS Beamline L (POF2-54G13) / FS-Proposal: I-20110682
(I-20110682)},
pid = {G:(DE-H253)POF2-L-20130405 / G:(DE-H253)I-20110682},
experiment = {EXP:(DE-H253)D-L-20150101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000324928700005},
pubmed = {pmid:23868355},
doi = {10.1039/c3mt00088e},
url = {https://bib-pubdb1.desy.de/record/166437},
}