Open Access
ARTICLE
Phytosulfokine-α Promotes Root Growth by Repressing Expression of Pectin Methylesterase Inhibitor (PMEI) Genes in Medicago truncatula
Liangliang Yu*, Wenjun Zhou, Danping Zhang, Junhui Yan, Li Luo
Shanghai Key Lab of Bio-Energy Crops, School of Life Sciences, Shanghai University, Shanghai, 200444, China
* Corresponding Author: Liangliang Yu. Email:
Phyton-International Journal of Experimental Botany 2020, 89(4), 873-881. https://doi.org/10.32604/phyton.2020.011882
Received 03 June 2020; Accepted 14 June 2020; Issue published 09 November 2020
Abstract
Phytosulfokine-α (PSK-α), a sulfated pentapeptide with the sequence
YIYTQ, is encoded by a small precursor gene family in Arabidopsis. PSK-α regulates multiple growth and developmental processes as a novel peptide hormone.
Despite its importance, functions of PSK-α in
M. truncatula growth remains
unknown. In this study, we identified five genes to encode PSK-α precursors in
M. truncatula. All of these precursors possess conserved PSK-α signature motif.
Expression pattern analysis of these
MtPSK genes revealed that each gene was
expressed in a tissue-specific or ubiquitous pattern and three of them were remarkably expressed in root. Treatment of
M. truncatula seedlings with synthetic PSK-
α peptide significantly promoted root elongation. In addition, expression analysis
of downstream genes by RNA-seq and qRT-PCR assays suggested that PSK-α
signaling might regulate cell wall structure via PMEI-PME module to promote
root cell growth. Taken together, our results shed light on the mechanism by
which PSK-α promotes root growth in
M. truncatula, providing a new resource
for improvement of root growth in agriculture.
Keywords
Cite This Article
APA Style
Yu, L., Zhou, W., Zhang, D., Yan, J., Luo, L. (2020). Phytosulfokine-α promotes root growth by repressing expression of <i>pectin methylesterase inhibitor</i> (<i>pmei</i>) genes in <i>medicago truncatula</i>. Phyton-International Journal of Experimental Botany, 89(4), 873-881. https://doi.org/10.32604/phyton.2020.011882
Vancouver Style
Yu L, Zhou W, Zhang D, Yan J, Luo L. Phytosulfokine-α promotes root growth by repressing expression of <i>pectin methylesterase inhibitor</i> (<i>pmei</i>) genes in <i>medicago truncatula</i>. Phyton-Int J Exp Bot. 2020;89(4):873-881 https://doi.org/10.32604/phyton.2020.011882
IEEE Style
L. Yu, W. Zhou, D. Zhang, J. Yan, and L. Luo "Phytosulfokine-α Promotes Root Growth by Repressing Expression of <i>Pectin Methylesterase Inhibitor</i> (<i>PMEI</i>) Genes in <i>Medicago truncatula</i>," Phyton-Int. J. Exp. Bot., vol. 89, no. 4, pp. 873-881. 2020. https://doi.org/10.32604/phyton.2020.011882
Citations