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@ARTICLE{Schmierer:904503,
author = {Schmierer, Marc and Knopf, Oliver and Asch, Folkard},
title = {{G}rowth and {P}hotosynthesis {R}esponses of a {S}uper
{D}warf {R}ice {G}enotype to {S}hade and {N}itrogen
{S}upply},
journal = {International journal of genetics and molecular biology},
volume = {28},
number = {2},
issn = {1672-6308},
address = {Nairobi, Kenya},
publisher = {Academic Journals},
reportid = {FZJ-2021-06073},
pages = {178 - 190},
year = {2021},
abstract = {Specific aspects of plant cultivation require tests under
fully controlled environmental conditions with restricted
energy supply, such as orbit-based space laboratories and
low-light conditions. For these growing conditions, super
dwarf plants have been developed as model crops, and a
gibberellin- deficient Super Dwarf Rice genotype was
proposed as a model crop for space flight plant experiments.
We tested this genotype in a climate chamber experiment
under different illumination and nitrogen supply levels to
assess its suitability under scenarios with limited resource
availability. A $25\%$ reduction in illumination led to a
$75\%$ reduction in yield, mainly due to a $60\%$ reduction
in formed tillers and $20\%$ reduction in grain weight, and
a $80\%$ reduction in illumination caused total yield loss.
Leaf area under reduced illumination was significantly
lower, and only marginal changes in the dimensions of leaves
were observed. Plant photosynthesis was not significantly
different between control and $75\%$ illumination. This was
explained by a higher photochemical efficiency under lower
light conditions and a reduced mesophyll resistance.
Therefore, we concluded that this genotype is well-suited
for plant experiments under space and light-limited
conditions since it kept its small stature and showed no
shade avoidance mechanisms, such as leaf elongation, which
would complicate experiments under low-light conditions.
Nitrogen concentrations of 2.8 and 1.4 mmol/L led to no
differences in plant growth. We concluded that a nitrogen
concentration of 1.4 mmol/L is sufficient for this genotype
under the light intensities.},
cin = {IBG-2},
ddc = {570},
cid = {I:(DE-Juel1)IBG-2-20101118},
pnm = {2171 - Biological and environmental resources for
sustainable use (POF4-217)},
pid = {G:(DE-HGF)POF4-2171},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000621206000008},
doi = {10.1016/j.rsci.2021.01.007},
url = {https://juser.fz-juelich.de/record/904503},
}