Plant species-specific recognition of long and short ß-1,3-linked glucans is mediated by different receptor systems.
Plant J
; 102(6): 1142-1156, 2020 06.
Article
en En
| MEDLINE
| ID: mdl-31925978
ABSTRACT
Plants survey their environment for the presence of potentially harmful or beneficial microbes. During colonization, cell surface receptors perceive microbe-derived or modified-self ligands and initiate appropriate responses. The recognition of fungal chitin oligomers and the subsequent activation of plant immunity are well described. In contrast, the mechanisms underlying ß-glucan recognition and signaling activation remain largely unexplored. Here, we systematically tested immune responses towards different ß-glucan structures and show that responses vary between plant species. While leaves of the monocots Hordeum vulgare and Brachypodium distachyon can recognize longer (laminarin) and shorter (laminarihexaose) ß-1,3-glucans with responses of varying intensity, duration and timing, leaves of the dicot Nicotiana benthamiana activate immunity in response to long ß-1,3-glucans, whereas Arabidopsis thaliana and Capsella rubella perceive short ß-1,3-glucans. Hydrolysis of the ß-1,6 side-branches of laminarin demonstrated that not the glycosidic decoration but rather the degree of polymerization plays a pivotal role in the recognition of long-chain ß-glucans. Moreover, in contrast to the recognition of short ß-1,3-glucans in A. thaliana, perception of long ß-1,3-glucans in N. benthamiana and rice is independent of CERK1, indicating that ß-glucan recognition may be mediated by multiple ß-glucan receptor systems.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Beta-Glucanos
/
Inmunidad de la Planta
Idioma:
En
Revista:
Plant J
Asunto de la revista:
BIOLOGIA MOLECULAR
/
BOTANICA
Año:
2020
Tipo del documento:
Article
País de afiliación:
Alemania