TY - JOUR
T1 - Phosphate Starvation-Dependent Iron Mobilization Induces CLE14 Expression to Trigger Root Meristem Differentiation through CLV2/PEPR2 Signaling
AU - Gutiérrez-Alanís, Dolores
AU - Yong-Villalobos, Lenin
AU - Jiménez-Sandoval, Pedro
AU - Alatorre-Cobos, Fulgencio
AU - Oropeza-Aburto, Araceli
AU - Mora-Macías, Javier
AU - Sánchez-Rodríguez, Federico
AU - Cruz-Ramírez, Alfredo
AU - Herrera-Estrella, Luis
N1 - Funding Information:
The authors wish to thank Dr. Ben Scheres and Dr. Frans Tax for providing published transgenic lines (pSHR::SHR∼GFP, pSCR::SCR∼GFP, pPIN1::PIN1∼GFP, pPIN2::PIN2∼GFP, pPIN3::PIN3∼GFP, and pPIN7::PIN7∼GFP; sol2-1, pepr2-1, and clv2-3); Dr. David King for a sample of synthetic CLE14 peptide; Dr. Lopez-Bucio for providing paraquat reagent and the lpr1lpr2 double mutant; Dr. Jia Li for providing the pPEPR2::GUS transgenic line; Dr. Marcos Castellanos-Uribe for his help in obtaining pCLE14::CLE14∼GFP; Dr. Stewart Gillmor for language editing of the manuscript; and M.J. Ortega for technical support. D.A. was supported by a CONACYT (Mexico) PhD fellowship. This work was supported in part by grants from the Howard Hughes Medical Institute (grant 55005946 to L.H.-E.) and CONACyT.
Publisher Copyright:
© 2017 Elsevier Inc.
PY - 2017/6/5
Y1 - 2017/6/5
N2 - Low inorganic phosphate (Pi) availability causes terminal differentiation of the root apical meristem (RAM), a phenomenon known as root meristem exhaustion or determined growth. Here, we report that the CLE14 peptide acts as a key player in this process. Low Pi stress induces iron mobilization in the RAM through the action of LPR1/LPR2, causing expression of CLE14 in the proximal meristem region. CLV2 and PEPR2 receptors perceive CLE14 and trigger RAM differentiation, with concomitant downregulation of SHR/SCR and PIN/AUXIN pathway. Our results reveal multiple steps of the molecular mechanism of one of the most physiologically important root nutrient responses.
AB - Low inorganic phosphate (Pi) availability causes terminal differentiation of the root apical meristem (RAM), a phenomenon known as root meristem exhaustion or determined growth. Here, we report that the CLE14 peptide acts as a key player in this process. Low Pi stress induces iron mobilization in the RAM through the action of LPR1/LPR2, causing expression of CLE14 in the proximal meristem region. CLV2 and PEPR2 receptors perceive CLE14 and trigger RAM differentiation, with concomitant downregulation of SHR/SCR and PIN/AUXIN pathway. Our results reveal multiple steps of the molecular mechanism of one of the most physiologically important root nutrient responses.
KW - CLE peptides
KW - cell differentiation
KW - phosphate starvation
KW - root development
KW - root stem cells
UR - http://www.scopus.com/inward/record.url?scp=85020162514&partnerID=8YFLogxK
U2 - 10.1016/j.devcel.2017.05.009
DO - 10.1016/j.devcel.2017.05.009
M3 - Article
C2 - 28586647
AN - SCOPUS:85020162514
SN - 1534-5807
VL - 41
SP - 555-570.e3
JO - Developmental Cell
JF - Developmental Cell
IS - 5
ER -