The Ultrastructure of the Early Development of Schizaea pusilla Gametophytes

Kiss, John Z.; Wang-Cahill, Fan; Kiss, Helen Guiragossian

doi:10.1086/297235

Cited by 6 publications

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“…zaea pusilla is one of the few ferns that maintains a To further characterize the endophytic fungi of S. pusilla and to elucidate the nature of their relationship completely filamentous and uniseriate gametophyte to this fern, we examined the endophytes within colthroughout its development (Kiss et al 1995). In S.…”

Section: Introductionmentioning

confidence: 99%

The Relationship of Endophytic Fungi to the Gametophyte of the Fern Schizaea pusilla

Swatzell¹,

Powell²,

Kiss³

1996

International Journal of Plant Sciences

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Schizaea pusilla is a rare and threatened fern restricted in North America to acidic bogs of Nova Scotia, Newfoundland, and New Jersey. The gametophyte lives in close association with two endophytic fungi. To characterize the nature of this fern's relationship with these fungi, we introduced axenic gametophytes to bog soil for colonization. Following colonization, the endophytic fungi were isolated and reintroduced to axenic gametophytes. The gametophytes introduced to bog soil were colonized by an aseptate fungus that formed vesicles and arbuscules within the gametophyte. However, culture of colonized gametophytes produced two fungal isolates: an aseptate fungus (fungus B) and a septate fungus (fungus A). Upon reintroduction of fungal isolates to axenically grown gametophytes, the aseptate fungus demonstrated a positive growth response to the presence of the gametophytes and colonized the gametophytes without harm to the host. The septate fungus did not exhibit any specific recognition but contacted the gametophytes randomly, leaving a large percentage of the host nonviable. We propose that the relationship of the septate fungus to the gametophyte of S. pusilla is nonmycorrhizal while the relationship of the aseptate fungus to the gametophyte is mycorrhizal. Furthermore, based on lack of nutrient availability in local soils, formation of specialized structures in the gametophyte for harboring fungi, and dependence of the fern on fungal presence for completion of its life cycle, we propose that S. pusilla maintains an obligatory relationship with the aseptate mycorrhizal fungus.

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Section: Introductionmentioning

confidence: 99%

The Relationship of Endophytic Fungi to the Gametophyte of the Fern Schizaea pusilla

Swatzell¹,

Powell²,

Kiss³

1996

International Journal of Plant Sciences

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“…In tip growing cells, patterns of MTs and/or MFs have been observed in various organisms by immunofluorescence microscopy, for example, in root hairs (Lloyd 1983), pollen tubes (Joos et al 1994, Terasaka andNiitsu 1994), fern and moss protonemata as well as their rhizoids (Murata et a/. 1987, Murata and Wada 1989b, Kadota and Wada 1989, Doonan 1991, or by electron microscopy in moss caulonemata (Schmiedel and Schnepf 1980), fern protonemata (Stetler and DeMaggio 1972, Wada and O'Brien 1975, Kiss et al 1995 and Nicotiana pollen (Lancelle et al 1987). To study the roles of the cytoskeleton, and especially of MTs, however, their distribution should be observed carefully and categories in which they are included, cortical or endoplasmic, be considered because the function of MTs clearly differ depending upon their localization.…”

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Cytoskeletal pattern changes during branch formation in a centrifugedAdiantum protonema

1998

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Nuclear behavior during branch formation in a centrifugedAdiantum protonema and the nuclear polarity

Wada

1995

J. Plant Res.

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The Ultrastructure of the Early Development of Schizaea pusilla Gametophytes

Cited by 6 publications

References 0 publications

The Relationship of Endophytic Fungi to the Gametophyte of the Fern Schizaea pusilla

The Relationship of Endophytic Fungi to the Gametophyte of the Fern Schizaea pusilla

Cytoskeletal pattern changes during branch formation in a centrifugedAdiantum protonema

Nuclear behavior during branch formation in a centrifugedAdiantum protonema and the nuclear polarity

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