Genome-wide identification and characterization of cucumber bHLH family genes and the functional characterization of CsbHLH041 in NaCl and ABA tolerance in Arabidopsis and cucumber

BACKGROUND: The basic/helix-loop-helix (bHLH) transcription factor family exists in all three eukaryotic kingdoms as important participants in biological growth and development. To date, the comprehensive genomic and functional analyses of bHLH genes has not been reported in cucumber (Cucumis sativus L.).

RESULTS: Here, a total of 142 bHLH genes were identified and classified into 32 subfamilies according to the conserved motifs, phylogenetic analysis and gene structures in cucumber. The sequences of CsbHLH proteins were highly conserved based on the results of multiple sequence alignment analyses. The chromosomal distribution, synteny analysis, and gene duplications of these 142 CsbHLHs were further analysed. Many elements related to stress responsiveness and plant hormones were present in the promoter regions of CsbHLH genes based on a cis-element analysis. By comparing the phylogeny of cucumber and Arabidopsis bHLH proteins, we found that cucumber bHLH proteins were clustered into different functional clades of Arabidopsis bHLH proteins. The expression analysis of selected CsbHLHs under abiotic stresses (NaCl, ABA and low-temperature treatments) identified five CsbHLH genes that could simultaneously respond to the three abiotic stresses. Tissue-specific expression profiles of these five genes were also analysed. In addition, 35S:CsbHLH041 enhanced the tolerance to salt and ABA in transgenic Arabidopsis and in cucumber seedlings, suggesting CsbHLH041 is an important regulator in response to abiotic stresses. Lastly, the functional interoperability network among the CsbHLH proteins was analysed.

CONCLUSION: This study provided a good foundation for further research into the functions and regulatory mechanisms of CsbHLH proteins and identified candidate genes for stress resistance in cucumber.

Medienart:

E-Artikel

Erscheinungsjahr:

2020

Erschienen:

2020

Enthalten in:

Zur Gesamtaufnahme - volume:20

Enthalten in:

BMC plant biology - 20(2020), 1 vom: 11. Juni, Seite 272

Sprache:

Englisch

Beteiligte Personen:

Li, Jialin [VerfasserIn]
Wang, Ting [VerfasserIn]
Han, Jing [VerfasserIn]
Ren, Zhonghai [VerfasserIn]

Links:

Volltext

Themen:

72S9A8J5GW
Abiotic stresses
Abscisic Acid
BHLH family
Basic Helix-Loop-Helix Transcription Factors
CsbHLH041
Cucumber
Expression patterns
Journal Article
Plant Proteins
Regulatory networks

Anmerkungen:

Date Completed 12.01.2021

Date Revised 12.01.2021

published: Electronic

Citation Status MEDLINE

doi:

10.1186/s12870-020-02440-1

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM311064329