INVESTIGADORES
GONZALEZ Ana Maria
artículos
Título:
Localization of the fungal symbiont (Chaetothyriales) in Ipomoea carnea
Autor/es:
PISTÁN MARIA ELENA; GUTIERREZ, SUSANA; SCHNITTGER, LEONHARD; GARDNER, DALE R.; CHOLICH, LUCIANA ANDREA; GONZALEZ, ANA MARIA
Revista:
BOTANY
Editorial:
NATL RESEARCH COUNCIL CANADA-N R C RESEARCH PRESS
Referencias:
Año: 2022 vol. 100 p. 729 - 736
ISSN:
1916-2790
Resumen:
Plants belonging to the genera Astragalus, Oxytropis, Ipomoea, Sida, and Swainsona often contain the toxin swainsonine (SW),which causes a neurological disorder in livestock. It has been demonstrated that SW is produced by a symbiont fungus associatedwith these plants. In I. carnea, the fungus belongs to the ascomycetes of the order Chaetothyriales and grows ectopically onthe adaxial surface of leaves. In this study, the presence of the symbiont fungus in different organs of I. carnea was investigatedusing imaging techniques to understand the process of endophyte transmission. In I. carnea plants with whitish mycelia onthe leaf surface, SW could be detected in seeds. Inside the seeds, the mycelium was located on the surface of the cotyledonsand on the inner side of the seed coat. We corroborated that the presence of this fungus is a prerequisite for the presence ofSW in I. carnea. The demonstration of the localization of the fungus within the seed strongly suggested that this endophyte isvertically transmitted. Our observations verified that the SW-producing fungus in I. carnea is an endosymbiont with epibioticbehavior.