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@ARTICLE{Nagel:49485,
author = {Nagel, K. and Schurr, U. and Walter, A.},
title = {{D}ynamics of root growth stimulation in {N}icotiana
tabacum in increasing light intensity},
journal = {Plant, cell $\&$ environment},
volume = {29},
issn = {0140-7791},
address = {Oxford [u.a.]},
publisher = {Wiley-Blackwell},
reportid = {PreJuSER-49485},
pages = {1936 - 1945},
year = {2006},
note = {Record converted from VDB: 12.11.2012},
abstract = {Light intensity is crucial for plant growth. In this study,
the hypothesis was tested whether a sudden increase in light
intensity leads to an immediate increase of root growth.
Seedlings of Nicotiana tabacum grown in agar-filled Petri
dishes were subjected to light intensities of 60 and 300
micromol m(-2) s(-1), respectively. Seedling biomass,
sucrose, glucose and fructose concentration as well as
primary root growth increased significantly with light
intensity. The dynamics of the increase in root growth were
analysed here in more detail. In transition experiments from
low to high light intensities, root growth increased by a
factor of four within 4 d, reaching the steady-state level
measured in plants that were cultivated in high-light
conditions. The distribution of relative elemental growth
rates along the root growth zone retained a constant shape
throughout this transition. During the first three hours
after light increase, strong growth fluctuations were
repeatedly observed with the velocity of the root tip
cycling in a sinusoidal pattern between 120 and 180 microm
h(-1). These dynamic patterns are discussed in the context
of hydraulic and photosynthetic acclimation to the altered
conditions. Experiments with externally applied sucrose and
with transgenic plants having reduced capacities for sucrose
synthesis indicated clearly that increasing light intensity
rapidly enhanced root growth by elevating sucrose export
from shoot to root.},
keywords = {Chlorophyll: metabolism / Light / Photosynthesis / Plant
Roots: growth $\&$ development / Plant Roots: metabolism /
Spectrometry, Fluorescence / Tobacco: growth $\&$
development / Tobacco: physiology / Tobacco: radiation
effects / Chlorophyll (NLM Chemicals) / J (WoSType)},
cin = {ICG-III / JARA-ENERGY},
ddc = {570},
cid = {I:(DE-Juel1)VDB49 / $I:(DE-82)080011_20140620$},
pnm = {Terrestrische Umwelt},
pid = {G:(DE-Juel1)FUEK407},
shelfmark = {Plant Sciences},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:16930319},
UT = {WOS:000240006300007},
doi = {10.1111/j.1365-3040.2006.01569.x},
url = {https://juser.fz-juelich.de/record/49485},
}