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Gibberellin Regulates LBD38-1 Responses to Xanthomonas arboricola pv. juglandis Infection in Walnut Bacterial Blight Pathogenesis
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Gibberellin Regulates LBD38-1 Responses to Xanthomonas arboricola pv. juglandis Infection in Walnut Bacterial Blight Pathogenesis
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Journal Article
Gibberellin Regulates LBD38-1 Responses to Xanthomonas arboricola pv. juglandis Infection in Walnut Bacterial Blight Pathogenesis
2025
Overview
Background
Plant responses to biotic and abiotic stresses are complex processes. Previous studies have shown that the
LBD
gene family plays important roles in plant growth and development as well as in plant defense against biotic and abiotic stresses. The expression of
LBD
genes was investigated in walnuts under biotic and abiotic stresses, revealing that
LBD38-1
may be a key gene in the plant stress response. This study provides new insights into the roles of
LBD
genes in plant responses to biotic stress.
Results
Forty-nine members of the
JrLBD
gene family were identified in the walnut genome and classified into six subfamilies. Comparative homology analysis through phylogenetic trees revealed that the presence of Group I-a and Group VI plays an important role in resistance to stressors. The expression of walnut
LBD
genes under cold-temperature, high-temperature, mechanical damage, and biotic stresses was analyzed via transcriptome sequencing, and the expression of
JrLBD38-1
in the Group VI subfamily was particularly prominent. According to transcriptome profile analysis,
JrLBD38-1
is highly expressed in different tissues of walnuts, suggesting that it plays a regulatory role in the growth and development of different tissues. The function of the Gibberellin (GA) response element in the
JrLBD38-1
promoter was further analyzed and verified. These findings confirmed that GA regulated
JrLBD38-1
expression changes during
Xanthomonas arboricola
pv.
juglandis
infestation of walnut leaves.
Conclusion
Forty-nine walnut
JrLBDs
were identified and classified into six subfamilies.
JrLBD38-1
has GA-inducible expression, is regulated by GA under pathogenic bacterial stress, and is involved in the response to biotic stress. This function of
JrLBD38-1
provides new insights into walnut disease resistance mechanisms.
Publisher
BioMed Central,BioMed Central Ltd,Springer Nature B.V,BMC
Subject
/ Animal Genetics and Genomics
/ Bacterial diseases of plants
/ Biomedical and Life Sciences
/ Blight
/ Control
/ Drought
/ Gene Expression Regulation, Plant - drug effects
/ Genes
/ Genomes
/ Homology
/ LBD
/ Microbial Genetics and Genomics
/ Plant Diseases - microbiology
/ Proteins
/ Stress
/ Stress, Physiological - genetics
/ Transcription Factors - genetics
/ Transcription Factors - metabolism
/ Walnut
