Aboveground insect infestation attenuates belowground Agrobacterium-mediated genetic transformation.
New Phytol
; 207(1): 148-158, 2015 Jul.
Article
en En
| MEDLINE
| ID: mdl-25676198
ABSTRACT
Agrobacterium tumefaciens causes crown gall disease. Although Agrobacterium can be popularly used for genetic engineering, the influence of aboveground insect infestation on Agrobacterium induced gall formation has not been investigated. Nicotiana benthamiana leaves were exposed to a sucking insect (whitefly) infestation and benzothiadiazole (BTH) for 7 d, and these exposed plants were inoculated with a tumorigenic Agrobacterium strain. We evaluated, both in planta and in vitro, how whitefly infestation affects crown gall disease. Whitefly-infested plants exhibited at least a two-fold reduction in gall formation on both stem and crown root. Silencing of isochorismate synthase 1 (ICS1), required for salicylic acid (SA) synthesis, compromised gall formation indicating an involvement of SA in whitefly-derived plant defence against Agrobacterium. Endogenous SA content was augmented in whitefly-infested plants upon Agrobacterium inoculation. In addition, SA concentration was three times higher in root exudates from whitefly-infested plants. As a consequence, Agrobacterium-mediated transformation of roots of whitefly-infested plants was clearly inhibited when compared to control plants. These results suggest that aboveground whitefly infestation elicits systemic defence responses throughout the plant. Our findings provide new insights into insect-mediated leaf-root intra-communication and a framework to understand interactions between three organisms whitefly, N. benthamiana and Agrobacterium.
Palabras clave
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Nicotiana
/
Transformación Genética
/
Agrobacterium tumefaciens
/
Hemípteros
Tipo de estudio:
Prognostic_studies
Límite:
Animals
Idioma:
En
Revista:
New Phytol
Asunto de la revista:
BOTANICA
Año:
2015
Tipo del documento:
Article
País de afiliación:
Corea del Sur