TY - JOUR
T1 - The Arabidopsis Root Tip (Phospho)Proteomes at Growth-Promoting versus Growth-Repressing Conditions Reveal Novel Root Growth Regulators
AU - Nikonorova, Natalia
AU - Murphy, Evan
AU - Fonseca de Lima, Cassio Flavio
AU - Zhu, Shanshuo
AU - van de Cotte, Brigitte
AU - Vu, Lam Dai
AU - Balcerowicz, Daria
AU - Li, Lanxin
AU - Kong, Xiangpei
AU - De Rop, Gieljan
AU - Beeckman, Tom
AU - Friml, Jiří
AU - Vissenberg, Kris
AU - Morris, Peter C.
AU - Ding, Zhaojun
AU - De Smet, Ive
PY - 2021/7/2
Y1 - 2021/7/2
N2 - Auxin plays a dual role in growth regulation and, depending on the tissue and concentration of the hormone, it can either promote or inhibit division and expansion processes in plants. Recent studies have revealed that, beyond transcriptional reprogramming, alternative auxin-controlled mechanisms regulate root growth. Here, we explored the impact of different concentrations of the synthetic auxin NAA that establish growth-promoting and -repressing conditions on the root tip proteome and phosphoproteome, generating a unique resource. From the phosphoproteome data, we pinpointed (novel) growth regulators, such as the RALF34-THE1 module. Our results, together with previously published studies, suggest that auxin, H+-ATPases, cell wall modifications and cell wall sensing receptor-like kinases are tightly embedded in a pathway regulating cell elongation. Furthermore, our study assigned a novel role to MKK2 as a regulator of primary root growth and a (potential) regulator of auxin biosynthesis and signalling, and suggests the importance of the MKK2 Thr31 phosphorylation site for growth regulation in the Arabidopsis root tip.
AB - Auxin plays a dual role in growth regulation and, depending on the tissue and concentration of the hormone, it can either promote or inhibit division and expansion processes in plants. Recent studies have revealed that, beyond transcriptional reprogramming, alternative auxin-controlled mechanisms regulate root growth. Here, we explored the impact of different concentrations of the synthetic auxin NAA that establish growth-promoting and -repressing conditions on the root tip proteome and phosphoproteome, generating a unique resource. From the phosphoproteome data, we pinpointed (novel) growth regulators, such as the RALF34-THE1 module. Our results, together with previously published studies, suggest that auxin, H+-ATPases, cell wall modifications and cell wall sensing receptor-like kinases are tightly embedded in a pathway regulating cell elongation. Furthermore, our study assigned a novel role to MKK2 as a regulator of primary root growth and a (potential) regulator of auxin biosynthesis and signalling, and suggests the importance of the MKK2 Thr31 phosphorylation site for growth regulation in the Arabidopsis root tip.
KW - (phospho)proteomics
KW - (receptor) kinase
KW - Auxin
KW - Primary root
UR - http://www.scopus.com/inward/record.url?scp=85114066297&partnerID=8YFLogxK
U2 - 10.3390/cells10071665
DO - 10.3390/cells10071665
M3 - Article
C2 - 34359847
SN - 2073-4409
VL - 10
JO - Cells
JF - Cells
IS - 7
M1 - 1665
ER -