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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: email

Phyton-International Journal of Experimental Botany 2020, 89(4), 873-881. https://doi.org/10.32604/phyton.2020.011882

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.

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APA Style
Yu, L., Zhou, W., Zhang, D., Yan, J., Luo, L. (2020). Phytosulfokine-α promotes root growth by repressing expression of pectin methylesterase inhibitor (pmei) genes in medicago truncatula. 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 pectin methylesterase inhibitor (pmei) genes in medicago truncatula. 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 Pectin Methylesterase Inhibitor (PMEI) Genes in Medicago truncatula," Phyton-Int. J. Exp. Bot., vol. 89, no. 4, pp. 873-881. 2020. https://doi.org/10.32604/phyton.2020.011882

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cc This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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