• English
    • español
  • English 
    • English
    • español
  • Login
View Item 
  •   DSpace Home
  • Investigación
  • Artículos Científicos
  • View Item
  •   DSpace Home
  • Investigación
  • Artículos Científicos
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Fungal endophytes limit pathogen damage in a tropical tree

Thumbnail
View/Open
Fungal-endophytes-limit-pathogen-damage-tropical-tree.pdf (329.2Kb)
Date
2003-10-23
Author
Arnold, A. Elizabeth
Mejía, Luis Carlos
Kyllo, Damond
Rojas, Enith I.
Maynard, Zuleyka
Robbins, Nancy
Herre, Edward Allen
Metadata
Show full item record
Abstract
Every plant species examined to date harbors endophytic fungi within its asymptomatic aerial tissues, such that endophytes represent a ubiquitous, yet cryptic, component of terrestrial plant communities. Fungal endophytes associated with leaves of woody angiosperms are especially diverse; yet, fundamental aspects of their interactions with hosts are unknown. In contrast to the relatively species-poor endophytes that are vertically transmitted and act as defensive mutualists of some temperate grasses, the diverse, horizontally transmitted endophytes of woody angiosperms are thought to contribute little to host defense. Here, we document high diversity, spatial structure, and host affinity among foliar endophytes associated with a tropical tree (Theobroma cacao, Malvaceae) across lowland Panama. We then show that inoculation of endophyte-free leaves with endophytes isolated frequently from naturally infected, asymptomatic hosts significantly decreases both leaf necrosis and leaf mortality when T. cacao seedlings are challenged with a major pathogen (Phytophthora sp.). In contrast to reports of fungal inoculation inducing systemic defense, we found that protection was primarily localized to endophyte-infected tissues. Further, endophyte-mediated protection was greater in mature leaves, which bear less intrinsic defense against fungal pathogens than do young leaves. In vitro studies suggest that host affinity is mediated by leaf chemistry, and that protection may be mediated by direct interactions of endophytes with foliar pathogens. Together, these data demonstrate the capacity of diverse, horizontally transmitted endophytes of woody angiosperms to play an important but previously unappreciated role in host defense.
URI
http://repositorio-indicasat.org.pa/handle/123456789/12
Collections
  • Artículos Científicos

El enlace del OAI de este repositorio: www.repositorio-indicasat.org.pa/oai/request
Repositorio del Instituto de Investigaciones Científicas y Servicios de Alta Tecnología de Panamá (INDICASAT).
Utiliza DSpace copyright © 2002-2016  DuraSpace
Contact Us | Send Feedback

 

 

Browse

All of DSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

My Account

LoginRegister

Statistics

View Usage Statistics

El enlace del OAI de este repositorio: www.repositorio-indicasat.org.pa/oai/request
Repositorio del Instituto de Investigaciones Científicas y Servicios de Alta Tecnología de Panamá (INDICASAT).
Utiliza DSpace copyright © 2002-2016  DuraSpace
Contact Us | Send Feedback