Overexpression of the salicylic acid binding protein 2 (SABP2) from tobacco enhances tolerance against Huanglongbing in transgenic citrus.
Plant Cell Rep
; 41(12): 2305-2320, 2022 Dec.
Article
em En
| MEDLINE
| ID: mdl-36107199
ABSTRACT
KEY MESSAGE Overexpression of the salicylic acid binding protein 2 (SABP2) gene from Tobacco results in enhanced tolerance to Huanglongbing (HLB; citrus greening disease) in transgenic sweet oranges. Huanglongbing (HLB), the most destructive citrus disease, is caused by Candidatus Liberibacter asiaticus (CaLas). Currently, no cure for this disease exists, and all commercially planted cultivars are highly susceptible. Salicylic Acid Binding Protein 2 (SABP2) is a well-characterized protein essential for establishing systemic acquired resistance (SAR) in tobacco. The constitutive over expression of SABP2 from tobacco (NtSABP2) in 'Hamlin' sweet orange resulted in the production of several transgenic lines with variable transcript levels. Transient expression of the NtSABP2-EGFP fusion protein in Nicotiana benthamiana plants demonstrated that NtSABP2 was cytosolic in its subcellular localization. In a long-term field study, we identified a SABP2 transgenic line with significantly reduced HLB symptoms that maintained a consistently low CaLas titer. Transcriptome analysis of this selected transgenic line demonstrated upregulation of several genes related to plant defense and SAR pathways. Genes, such as NPR family genes and those coding for monooxygenases and lipoxygenases, were upregulated in the 35S-NtSABP2 overexpressing line and might be candidates for incorporation into our citrus improvement program.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Rhizobiaceae
/
Citrus
/
Citrus sinensis
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
Plant Cell Rep
Assunto da revista:
BOTANICA
Ano de publicação:
2022
Tipo de documento:
Article
País de afiliação:
Estados Unidos