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@ARTICLE{ChavarriaKrauser:45871,
author = {Chavarria-Krauser, A. and Jäger, W. and Schurr, U.},
title = {{P}rimary root growth: a biophysical model of auxin-related
control},
journal = {Functional plant biology},
volume = {32},
issn = {1445-4408},
address = {Collingwood, Victoria},
publisher = {CSIRO Publ.},
reportid = {PreJuSER-45871},
pages = {849 - 862},
year = {2005},
note = {Record converted from VDB: 12.11.2012},
abstract = {Plant hormones control many aspects of plant development
and play an important role in root growth. Many plant
reactions, such as gravitropism and hydrotropism, rely on
growth as a driving motor and hormones as signals. Thus,
modelling the effects of hormones on expanding root tips is
an essential step in understanding plant roots. Here we
achieve a connection between root growth and hormone
distribution by extending a model of root tip growth, which
describes the tip as a string of dividing and expanding
cells. In contrast to a former model, a biophysical growth
equation relates the cell wall extensibility, the osmotic
potential and the yield threshold to the relative growth
rate. This equation is used in combination with a refined
hormone model including active auxin transport. The model
assumes that the wall extensibility is determined by the
concentration of a wall enzyme, whose production and
degradation are assumed to be controlled by auxin and
cytokinin. Investigation of the effects of auxin on the
relative growth rate distribution thus becomes possible.
Solving the equations numerically allows us to test the
reaction of the model to changes in auxin production.
Results are validated with measurements found in
literature.},
keywords = {J (WoSType)},
cin = {ICG-III},
ddc = {580},
cid = {I:(DE-Juel1)VDB49},
pnm = {Chemie und Dynamik der Geo-Biosphäre},
pid = {G:(DE-Juel1)FUEK257},
shelfmark = {Plant Sciences},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000231449800010},
doi = {10.1071/FP05033},
url = {https://juser.fz-juelich.de/record/45871},
}