Mycorrhizal-like interaction between gametophytes and young sporophytes of the fern Dryopteris muenchii (Filicales) and its fungal endophyte

The morphology of a Glomus-like fungus-host interaction in chlorophyllous gametophytes and young apogamic sporophytes of Dryopteris muenchii A.R. Sm. was studied from ferns cultivated in laboratory, using soil as substrate. An aseptate fungus colonized the gametophytes' tissue through the rhizo...

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Bibliographic Details
Published inRevista de biología tropical Vol. 56; no. 3; pp. 1101 - 1107
Main Authors Reyes-Jaramillo, Irma, Camargo-Ricalde, Sara Lucía, Aquiahuatl-Ramos, Ma de los Angeles
Format Journal Article
LanguageEnglish
Portuguese
Published Costa Rica Universidad de Costa Rica 01.09.2008
Subjects
Arbuscular mycorrhiza
Biodiversity Conservation
Biology
chlorophyllous gametophyte
Dryopteridaceae
Dryopteris - microbiology
endemic fern
endophyte
endófito
gametofito clorofílico
Glomeromycota - growth & development
Glomeromycota - physiology
helecho endémico
Mexico
Micorriza arbuscular
Mycorrhizae - physiology
México
Spores, Fungal - cytology
Mexico
endemic fern
Dryopteridaceae
helecho endémico
Mexico
México
endophyte
gametofito clorofílico
chlorophyllous gametophyte
Arbuscular mycorrhiza
Micorriza arbuscular
endófito
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Summary:The morphology of a Glomus-like fungus-host interaction in chlorophyllous gametophytes and young apogamic sporophytes of Dryopteris muenchii A.R. Sm. was studied from ferns cultivated in laboratory, using soil as substrate. An aseptate fungus colonized the gametophytes' tissue through the rhizoids, developing vesicles. The fungus penetrated the young sporophytes primary roots by developing appressoria. It spread forming inter- and intra-cellular hyphae through the epidermis and the outermost cortical cell layers, where it formed vesicles, hyphal coils-like and arbuscules. The fungus hyphae never colonized the gametophyte-sporophyte cellular junction. The fungal structures observed on D. muenchii during this study, are rather similar to those reported for the plant host-arbuscular mycorrhizal fungus (AMF) interaction, where the AMF described belonged to Phylum Glomeromycota. Therefore, this study is a contribution to the scarce knowledgement of the association between AMF and chlorophyllous gametophytes and young apogamic sporophytes of ferns.
ISSN:0034-7744
2215-2075