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@ARTICLE{Miguel:202315,
author = {Miguel, Magalhaes Amade and Postma, Johannes Auke and
Lynch, Jonathan Paul},
title = {{P}hene {S}ynergism between {R}oot {H}air {L}ength and
{B}asal {R}oot {G}rowth {A}ngle for {P}hosphorus
{A}cquisition},
journal = {Plant physiology},
volume = {167},
number = {4},
issn = {1532-2548},
address = {Rockville, Md.},
publisher = {Soc.},
reportid = {FZJ-2015-04579},
pages = {1430 - 1439},
year = {2015},
abstract = {Shallow basal root growth angle (BRGA) increases phosphorus
acquisition efficiency by enhancing topsoil foraging because
in most soils, phosphorus is concentrated in the topsoil.
Root hair length and density (RHL/D) increase phosphorus
acquisition by expanding the soil volume subject to
phosphorus depletion through diffusion. We hypothesized that
shallow BRGA and large RHL/D are synergetic for phosphorus
acquisition, meaning that their combined effect is greater
than the sum of their individual effects. To evaluate this
hypothesis, phosphorus acquisition in the field in
Mozambique was compared among recombinant inbred lines of
common bean (Phaseolus vulgaris) having four distinct root
phenotypes: long root hairs and shallow basal roots, long
root hairs and deep basal roots, short root hairs and
shallow basal roots, and short root hairs and deep basal
roots. The results revealed substantial synergism between
BRGA and RHL/D. Compared with short-haired, deep-rooted
phenotypes, long root hairs increased shoot biomass under
phosphorus stress by $89\%,$ while shallow roots increased
shoot biomass by $58\%.$ Genotypes with both long root hairs
and shallow roots had $298\%$ greater biomass accumulation
than short-haired, deep-rooted phenotypes. Therefore, the
utility of shallow basal roots and long root hairs for
phosphorus acquisition in combination is twice as large as
their additive effects. We conclude that the anatomical
phene of long, dense root hairs and the architectural phene
of shallower basal root growth are synergetic for phosphorus
acquisition. Phene synergism may be common in plant biology
and can have substantial importance for plant fitness, as
shown here.},
cin = {IBG-2},
ddc = {580},
cid = {I:(DE-Juel1)IBG-2-20101118},
pnm = {582 - Plant Science (POF3-582)},
pid = {G:(DE-HGF)POF3-582},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000354438500019},
pubmed = {pmid:25699587},
doi = {10.1104/pp.15.00145},
url = {https://juser.fz-juelich.de/record/202315},
}