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Related Experiment Video

Updated: Jan 21, 2026

A Workflow for the Quantitative Assessment of the Endophytic and Epiphytic Bacterial Microbiomes of the Bark of Populus trichocarpa

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Published on: June 27, 2025

Involvement of Populus CLEL peptides in root development.

Dongdong Tian¹, Yueyuan Liu^1,2, Lidan Tian¹

¹Key Laboratory of Horticultural Plant Biology of Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Shizishan street number 1, Hongshan district, Wuhan 430070, China.

Tree Physiology

|August 7, 2019

Summary

Researchers identified 12 CLV3/EMBRYO SURROUNDING REGION-RELATED (CLE)-like (CLEL) genes in Populus trichocarpa. These PtrCLEL peptides impact root development, causing thickening and altered lateral root formation in both Arabidopsis and Populus species.

Keywords:

Arabidopsis thaliana Populus PtrCLEL lateral root peptide hormones root

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Area of Science:

Plant molecular biology
Plant development
Genomics

Background:

The CLV3/EMBRYO SURROUNDING REGION-RELATED (CLE)-like (CLEL) peptide family regulates key plant growth processes.
Understanding CLEL function in woody plants like Populus trichocarpa is crucial for agricultural and ecological applications.

Purpose of the Study:

To identify and characterize CLEL genes in Populus trichocarpa.
To investigate the structural and functional similarities between Populus and Arabidopsis CLEL peptides.
To determine the effects of PtrCLEL peptides on root development.

Main Methods:

Bioinformatic analysis of 12 CLEL genes in Populus trichocarpa.
Gene model revision for five PtrCLELs.
In silico and quantitative real-time PCR for expression analysis.
Exogenous application of synthesized PtrCLEL peptides to Arabidopsis and Populus seedlings.
Anatomical and histological analysis of treated Populus tissues.

Main Results:

Identified 12 PtrCLEL genes with conserved structural features, including a signal peptide and a CLEL motif.
PtrCLELs are widely expressed across various Populus tissues.
PtrCLEL peptides induced root abnormalities, such as curling, reduced lateral roots in Arabidopsis, and thickening with clustered lateral roots in Populus.
Root thickening in Populus is attributed to increased cell numbers in the epidermis, hypodermis, and cortex.
PtrCLEL peptide activity on root development is species-dependent.

Conclusions:

PtrCLEL and AtCLEL genes share similar protein structures, conserved peptide motifs, and exhibit comparable activities on root development.
The functional effects of PtrCLEL peptides on root development vary between plant species.