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@ARTICLE{Loivamki:56811,
author = {Loivamäki, M. and Gilmer, F. and Fischbach, R. J. and
Sörgel, Ch. and Bachl, A. and Walter, A. and Schnitzler,
J.-P.},
title = {{A}rabidopsis, a model to study biological functions of
isoprene emission?},
journal = {Plant physiology},
volume = {144},
issn = {0032-0889},
address = {Rockville, Md.: Soc.},
publisher = {JSTOR},
reportid = {PreJuSER-56811},
pages = {1066 - 1078},
year = {2007},
note = {Record converted from VDB: 12.11.2012},
abstract = {The volatile hemiterpene isoprene is emitted from plants
and can affect atmospheric chemistry. Although recent
studies indicate that isoprene can enhance thermotolerance
or quench oxidative stress, the underlying physiological
mechanisms are largely unknown. In this work, Arabidopsis
(Arabidopsis thaliana), a natural nonemitter of isoprene and
the model plant for functional plant analyses, has been
constitutively transformed with the isoprene synthase gene
(PcISPS) from Grey poplar (Populus x canescens).
Overexpression of poplar ISPS in Arabidopsis resulted in
isoprene-emitting rosettes that showed transiently enhanced
growth rates compared to the wild type under moderate
thermal stress. The findings that highest growth rates,
higher dimethylallyl diphosphate levels, and enzyme activity
were detected in young plants during their vegetative growth
phase indicate that enhanced growth of transgenic plants
under moderate thermal stress is due to introduced PcISPS.
Dynamic gas-exchange studies applying transient cycles of
heat stress to the wild type demonstrate clearly that the
prime physiological role of isoprene formation in
Arabidopsis is not to protect net assimilation from damage
against thermal stress, but may instead be to retain the
growth potential or coordinated vegetative development of
the plant. Hence, this study demonstrates the enormous
potential but also the pitfalls of transgenic Arabidopsis
(or other nonnatural isoprenoid emitters) in studying
isoprene biosynthesis and its biological function(s).},
keywords = {Adaptation, Physiological / Arabidopsis: genetics /
Arabidopsis: growth $\&$ development / Arabidopsis:
metabolism / Biosynthetic Pathways: physiology / Butadienes:
metabolism / Hemiterpenes: metabolism / Hot Temperature /
Models, Biological / Molecular Sequence Data / Pentanes:
metabolism / Photosynthesis: physiology / Plants,
Genetically Modified: growth $\&$ development / Plants,
Genetically Modified: metabolism / Populus: genetics /
Volatilization / Butadienes (NLM Chemicals) / Hemiterpenes
(NLM Chemicals) / Pentanes (NLM Chemicals) / isoprene (NLM
Chemicals) / J (WoSType)},
cin = {ICG-3},
ddc = {580},
cid = {I:(DE-Juel1)ICG-3-20090406},
pnm = {Terrestrische Umwelt},
pid = {G:(DE-Juel1)FUEK407},
shelfmark = {Plant Sciences},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:17468218},
pmc = {pmc:PMC1914154},
UT = {WOS:000247075000047},
doi = {10.1104/pp.107.098509},
url = {https://juser.fz-juelich.de/record/56811},
}