BONNOT, Clémence; PINSON, Benoît; CLÉMENT, Mathilde; BERNILLON, Stéphane; CHIARENZA, Serge; KANNO, Satomi; KOBAYASHI, Natsuko I.; DELANNOY, Etienne; NAKANISHI, Tomoko M; NUSSAUME, Laurent; DESNOS, Thierry

doi:10.1111/nph.13591

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

BONNOT, Clémence
Plant Environmental Physiology and Stress Signaling [PEPSS]

PINSON, Benoît
Institut de biochimie et génétique cellulaires [IBGC]

CLÉMENT, Mathilde
Plant Environmental Physiology and Stress Signaling [PEPSS]

Langue

Article de revue

Ce document a été publié dans

New Phytologist. 2016-01, vol. 209, n° 1, p. 161-176

Wiley

Résumé en anglais

Plants display numerous strategies to cope with phosphate (Pi)-deficiency. Despite multiple genetic studies, the molecular mechanisms of low-Pi-signalling remain unknown. To validate the interest of chemical genetics to investigate this pathway we discovered and analysed the effects of PHOSTIN (PSN), a drug mimicking Pi-starvation in Arabidopsis. We assessed the effects of PSN and structural analogues on the induction of Pi-deficiency responses in mutants and wild-type and followed their accumulation in plants organs by high pressure liquid chromotography (HPLC) or mass-spectrophotometry. We show that PSN is cleaved in the growth medium, releasing its active motif (PSN11), which accumulates in plants roots. Despite the overaccumulation of Pi in the roots of treated plants, PSN11 elicits both local and systemic Pi-starvation effects. Nevertheless, albeit that the transcriptional activation of low-Pi genes by PSN11 is lost in the phr1;phl1 double mutant, neither PHO1 nor PHO2 are required for PSN11 effects. The range of local and systemic responses to Pi-starvation elicited, and their dependence on the PHR1/PHL1 function suggests that PSN11 affects an important and early step of Pi-starvation signalling. Its independence from PHO1 and PHO2 suggest the existence of unknown pathway(s), showing the usefulness of PSN and chemical genetics to bring new elements to this field.< Réduire

Mots clés

chemical genetics

Mots clés en anglais

Arabidopsis thaliana

Oryza sativa

PHOSTIN

phosphate homeostasis

phosphate starvation

phr1

phl1 mutant

DOI

http://dx.doi.org/10.1111/nph.13591

Project ANR

Génétique d'une voie limitant la croissance racinaire d'Arabidopsis en réponse à la carence phosphatée - ANR-09-BLAN-0118
Phosphate signalling - ANR-08-KBBE-0006

Origine

Importé de hal

Unités de recherche

Biologie du Fruit & Pathologie (BFP) - UMR 1332