Systemic Expression of Genes Involved in the Plant Defense Response Induced by Wounding in Senna tora

Wounds in tissues provide a pathway of entry for pathogenic fungi and bacteria in plants. Plants respond to wounding by regulating the expression of genes involved in their defense mechanisms. To analyze this response, we investigated the defense-related genes induced by wounding in the leaves of Se...

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Published in:International journal of molecular sciences 2021-09, Vol.22 (18), p.10073
Main Authors: Kang, Ji-Nam, Lee, Woo-Haeng, Won, So Youn, Chang, Saemin, Hong, Jong-Pil, Oh, Tae-Jin, Lee, Si Myung, Kang, Sang-Ho
Format: Article
Language:English
Subjects:
Abiotic stress
Biosynthesis
Chitinase
Cysteine proteinase
Defense mechanisms
ethylene biosynthesis
Flavonoids
Gene expression
Genes
Genomes
Hormones
jasmonate biosynthesis
Jasmonic acid
Kaempferol
Leaves
Metabolism
Metabolites
pathogenesis related genes
Pathogens
Plant growth
Proteinase
Proteinase inhibitors
Proteins
Quercetin
Senna tora
systemic defense response
Thaumatin
Transcription factors
Wound healing
Wounding
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Summary:Wounds in tissues provide a pathway of entry for pathogenic fungi and bacteria in plants. Plants respond to wounding by regulating the expression of genes involved in their defense mechanisms. To analyze this response, we investigated the defense-related genes induced by wounding in the leaves of Senna tora using RNA sequencing. The genes involved in jasmonate and ethylene biosynthesis were strongly induced by wounding, as were a large number of genes encoding transcription factors such as ERFs, WRKYs, MYBs, bHLHs, and NACs. Wounding induced the expression of genes encoding pathogenesis-related (PR) proteins, such as PR-1, chitinase, thaumatin-like protein, cysteine proteinase inhibitor, PR-10, and plant defensin. Furthermore, wounding led to the induction of genes involved in flavonoid biosynthesis and the accumulation of kaempferol and quercetin in S. tora leaves. All these genes were expressed systemically in leaves distant from the wound site. These results demonstrate that mechanical wounding can lead to a systemic defense response in the Caesalpinioideae, a subfamily of the Leguminosae. In addition, a co-expression analysis of genes induced by wounding provides important information about the interactions between genes involved in plant defense responses.
ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms221810073