“Candidatus Liberibacter asiaticus” Infection Induces Citric Acid Accumulation and Immune Responses Mediated by the Transcription Factor CitPH4 DOI Creative Commons

Bin Hu,

Tao Yuan, Zhihao Lu

et al.

Molecular Plant Pathology, Journal Year: 2025, Volume and Issue: 26(2)

Published: Feb. 1, 2025

ABSTRACT Citrus huanglongbing (HLB), caused by “ Candidatus Liberibacter” spp., is one of the most disastrous citrus diseases worldwide. HLB‐affected fruits are significantly more acidic than healthy fruits. However, molecular mechanism behind this phenomenon remains to be elucidated. Here, we report that have higher levels citric acid (CA) Moreover, PH4 ( CitPH4 ), which encodes a MYB transcription factor functions as key regulator CA accumulation, was upregulated in relative Heterologous overexpression tobacco Nicotiana tabacum ) plants enhanced tolerance HLB. Subsequently, and gene‐editing experiments indicated can affect salicylic (SA) pathway, directly binds activates promoter CsPBS3 , gene SA biosynthesis. had Furthermore, application activated biosynthesis signalling decreased Liberibacter asiaticus” C Las) titres infected leaves. This work suggests node between SA, thus revealing crosstalk defence responses fruit quality citrus.

Language: Английский

“Candidatus Liberibacter asiaticus” Infection Induces Citric Acid Accumulation and Immune Responses Mediated by the Transcription Factor CitPH4 DOI Creative Commons

Bin Hu,

Tao Yuan, Zhihao Lu

et al.

Molecular Plant Pathology, Journal Year: 2025, Volume and Issue: 26(2)

Published: Feb. 1, 2025

ABSTRACT Citrus huanglongbing (HLB), caused by “ Candidatus Liberibacter” spp., is one of the most disastrous citrus diseases worldwide. HLB‐affected fruits are significantly more acidic than healthy fruits. However, molecular mechanism behind this phenomenon remains to be elucidated. Here, we report that have higher levels citric acid (CA) Moreover, PH4 ( CitPH4 ), which encodes a MYB transcription factor functions as key regulator CA accumulation, was upregulated in relative Heterologous overexpression tobacco Nicotiana tabacum ) plants enhanced tolerance HLB. Subsequently, and gene‐editing experiments indicated can affect salicylic (SA) pathway, directly binds activates promoter CsPBS3 , gene SA biosynthesis. had Furthermore, application activated biosynthesis signalling decreased Liberibacter asiaticus” C Las) titres infected leaves. This work suggests node between SA, thus revealing crosstalk defence responses fruit quality citrus.

Language: Английский

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