Skip to Main content Skip to Navigation
Journal articles

Identification of QTL controlling root growth response to phosphate starvation in Arabidopsis thaliana

Abstract : One of the responses of plants to low sources of external phosphorus (P) is to modify root architecture. In Arabidopsis thaliana plantlets grown on low P, the primary root length (PRL) is reduced whereas lateral root growth is promoted. By using the Bay-0 × Shahdara recombinant inbred line (RIL) population, we have mapped three quantitative trait loci (QTL) involved in the root growth response to low P. The Shahdara alleles at these three QTL promote the response of the primary root to low P (i.e. root length reduction). One of these QTL, LPR1, located in a 2.8 Mb region at the top of chromosome 1, explains 52% of the variance of the PRL. We also detected a single QTL associated with primary root cell elongation in response to low P which colocalizes with LPR1. LPR1 does not seem to be involved in other typical P-starvation responses such as growth and density of root hairs, excretion of acid phosphatases, anthocyanin accumulation or the transcriptional induction of the P transporter Pht1;4. LPR1 might highlight new aspects of root growth that are revealed specifically under low P conditions.
Document type :
Journal articles
Complete list of metadata

https://hal.inrae.fr/hal-02659203
Contributor : Migration Prodinra <>
Submitted on : Saturday, May 30, 2020 - 1:41:18 PM
Last modification on : Tuesday, November 3, 2020 - 3:08:04 AM

Links full text

Identifiers

Collections

Citation

Matthieu Reymond, Sergio Svistoonoff, Olivier Loudet, Laurent Nussaume, Thierry Desnos. Identification of QTL controlling root growth response to phosphate starvation in Arabidopsis thaliana. Plant, Cell and Environment, Wiley, 2006, 29 (1), pp.115-125. ⟨10.1111/j.1365-3040.2005.01405.x⟩. ⟨hal-02659203⟩

Share

Metrics

Record views

31