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Genome-wide characterization, expression and functional analysis of CLV3/ESR gene family in tomato
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Genome-wide characterization, expression and functional analysis of CLV3/ESR gene family in tomato
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Journal Article
Genome-wide characterization, expression and functional analysis of CLV3/ESR gene family in tomato
2014
Overview
Background
By encoding a group of small secretory peptides, the members of the CLAVATA3/EMBRYO-SURROUNDING REGION (CLE) family play important roles in cell-to-cell communication to control the balance between stem cell proliferation and differentiation in plant development. Despite recent identification and characterization of members of this gene family in several plant species, little is known about its functional role in plants with fleshy fruits.
Results
In total, fifteen
CLE
genes (
SlCLE1-15
) were identified from tomato (
Solanum lycopersicum
cv. ‘Heinz-1706’) genome and their multiple characters including phylogeny, gene structures, chromosome locations, conserved motifs and
cis
-elements in the promoter sequences, were analyzed. Real-time PCR analysis showed that 13 out of 15 identified
SlCLE
genes are transcribed and exhibit remarkably unique expression patterns among tissues and organs. In particular,
SlCLE12
, the homologue of
Arabidopsis CLE41/44
gene, appears to be the dominant
CLE
gene in most of tested tissues with its maximum expression found in vascular tissues. Meanwhile,
SlCLE1, 10, 13
exhibit specific but distinct expression in flower bud, root and shoot apex, respectively. More notably, several
SlCLEs
are dramatically regulated in their transcriptional levels during fruit development and ripening, indicating significant role these genes may potentially play in the critical physiological process. Upon the treatment with synthetic peptides corresponding to the 12-aa CLE domains of SlCLE 10, 12 and 13, tomato seedlings exhibit a clear reduction in root length to varying degrees.
Conclusions
This study provides a comprehensive genomic analysis of
CLE
gene family in tomato, a crop species with fleshy fruit. Differential expression patterns of various
SlCLEs
provide important insights into the functional divergence of CLE signaling cascade in
Solanaceae
species, especially their potential involvements in the regulation of fruit development and ripening.
Publisher
BioMed Central,BioMed Central Ltd,Springer Nature B.V
Subject
/ Animal Genetics and Genomics
/ Arabidopsis Proteins - genetics
/ Biomedical and Life Sciences
/ Chromosomes, Plant - metabolism
/ Fruits
/ Gene Expression Regulation, Plant
/ Genes
/ Lycopersicon esculentum - genetics
/ Microbial Genetics and Genomics
/ Peptides
/ Peptides - chemical synthesis
/ Plant Proteins - classification
/ Seedlings - growth & development
/ Seeds
/ Solanum
/ Tomatoes
