Witches' Broom Disease of Lime Contributes to Phytoplasma Epidemics and Attracts Insect Vectors

An insect-transmitted phytoplasma causing Witches' Broom Disease of Lime (WBDL) is responsible for the drastic decline in lime production in several countries. However, it is unclear how WBDL phytoplasma (WBDLp) induces witches' broom symptoms and if these symptoms contribute to the spread...

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Veröffentlicht in:Plant disease. - 1997. - 105(2021), 9 vom: 21. Sept., Seite 2637-2648
1. Verfasser: Al-Subhi, A M (VerfasserIn)
Weitere Verfasser: Al-Sadi, A M, Al-Yahyai, R A, Chen, Y, Mathers, T, Orlovskis, Z, Moro, G, Mugford, S, Al-Hashmi, K S, Hogenhout, S A
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2021
Zugriff auf das übergeordnete Werk:Plant disease
Schlagworte:Journal Article Hishimonus phycitis SAP11 TCP effector transcription factors
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520 |a An insect-transmitted phytoplasma causing Witches' Broom Disease of Lime (WBDL) is responsible for the drastic decline in lime production in several countries. However, it is unclear how WBDL phytoplasma (WBDLp) induces witches' broom symptoms and if these symptoms contribute to the spread of phytoplasma. Here we show that the gene encoding SAP11 of WBDLp (SAP11WBDL) is present in all WBDLp isolates collected from diseased trees. SAP11WBDL interacts with acid lime (Citrus aurantifolia) TCP transcription factors, specifically members of the TB1/CYC class that have a role in suppressing axillary branching in plants. Sampling of WBDLp-infected lime trees revealed that WBDLp titers and SAP11WBDL expression levels were higher in symptomatic leaves compared with asymptomatic sections of the same trees. Moreover, the witches' brooms were found to attract the vector leafhopper. Defense genes that have a role in plant defense responses to bacteria and insects are more downregulated in witches' brooms compared with asymptomatic sections of trees. These findings suggest that witches' broom-affected parts of the trees contribute to WBDL epidemics by supporting higher phytoplasma titers and attracting insect vectors 
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650 4 |a Hishimonus phycitis 
650 4 |a SAP11 
650 4 |a TCP 
650 4 |a effector 
650 4 |a transcription factors 
700 1 |a Al-Sadi, A M  |e verfasserin  |4 aut 
700 1 |a Al-Yahyai, R A  |e verfasserin  |4 aut 
700 1 |a Chen, Y  |e verfasserin  |4 aut 
700 1 |a Mathers, T  |e verfasserin  |4 aut 
700 1 |a Orlovskis, Z  |e verfasserin  |4 aut 
700 1 |a Moro, G  |e verfasserin  |4 aut 
700 1 |a Mugford, S  |e verfasserin  |4 aut 
700 1 |a Al-Hashmi, K S  |e verfasserin  |4 aut 
700 1 |a Hogenhout, S A  |e verfasserin  |4 aut 
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773 1 8 |g volume:105  |g year:2021  |g number:9  |g day:21  |g month:09  |g pages:2637-2648 
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