%0 Journal Article
%A Kuppe, Christian W.
%A Kirk, Guy J. D.
%A Wissuwa, Matthias
%A Postma, Johannes A.
%T Rice increases phosphorus uptake in strongly sorbing soils by intra‐root facilitation
%J Plant, cell & environment
%V 45
%N 3
%@ 0140-7791
%C Oxford [u.a.]
%I Wiley-Blackwell
%M FZJ-2022-01427
%P  884-899
%D 2022
%Z FundingCK and JP were institutionally funded by the Helmholtz Association (POF IV: 2171, Biological and environmental resources for sustainable use). GK was supported by BBSRC (Grant Ref. BB/R020388/1) and OCP (Cranfield-Rothamsted-UM6P Collaboration Grant).
%X Upland rice (Oryza sativa) is adapted to strongly phosphorus (P) sorbing soils. The mechanisms underlying P acquisition, however, are not well understood, and models typically underestimate uptake. This complicates root ideotype development and trait-based selection for further improvement. We present a novel model, which correctly simulates the P uptake by a P-efficient rice genotype measured over 48 days of growth. The model represents root morphology at the local rhizosphere scale, including root hairs and fine S-type laterals. It simulates fast- and slowly reacting soil P and the P-solubilizing effect of root-induced pH changes in the soil. Simulations predict that the zone of pH changes and P solubilization around a root spreads further into the soil than the zone of P depletion. A root needs to place laterals outside its depletion- but inside its solubilization zone to maximize P uptake. S-type laterals, which are short but hairy, appear to be the key root structures to achieve that. Thus, thicker roots facilitate the P uptake by fine lateral roots. Uptake can be enhanced through longer root hairs and greater root length density but was less sensitive to total root length and root class proportions.
%F PUB:(DE-HGF)16
%9 Journal Article
%$ 35137976
%U <Go to ISI:>//WOS:000761260100022
%R 10.1111/pce.14285
%U https://juser.fz-juelich.de/record/906413