The life history of Vittaria lineata

Britton, Elizabeth G.; Taylor, Alexandrina

doi:10.5962/bhl.title.97399

Cited by 10 publications

(9 citation statements)

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“…Elsewhere, the thallus remains only one cell in thickness, but, in the vicinity of the archegonia, a second cell layer is formed, consisting of the egg cell and eight to twelve surrounding jacket cells. As reported by Britton and Taylor (1902), the slightly curved neck usually consists of four tiers of four cells each.…”

Section: Spore Germination and Vegetative Growth-mentioning

confidence: 74%

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Gemmiferous Fern Gametophytes—vittariaceae

Farrar

1974

American J of Botany

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Approximately 10 % of all fern species reproduce vegetatively in the gametophytic stage by means of gemmae. Gametophyte morphologies in these species depart radically from the commonly figured heart‐shaped type and expand considerably the opportunities for physiological and morphological studies utilizing fern gametophytes. Original observations on four species of vittarioid ferns are presented and compared with earlier observations on gametophytes of this family. Vittarioid gametophytes grow from a discontinuous marginal meristem which results in a much branched thallus of indeterminant growth. Aerial branches of the gametophytes terminate in gemma production, which proceeds by a regular and predictable sequence of events. The sequence may differ considerably among species but is remarkably constant within species. Archegonia are produced on short ventral branches, and antheridia are produced primarily on germinating gemmae. Ananthacorus angustifolius is the only known member of the Vittariaceae which does not produce gemmae and is considered to represent the primitive condition. In this species antheridia are scattered over the thallus, suggesting that a change in the mode of control of antheridium production may have evolved in the family along with gemma production.

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Section: Spore Germination and Vegetative Growth-mentioning

confidence: 74%

“…OBSERVATIONs-Early descriptions of vittarioid gametophytes were made by Goebel (1888Goebel ( , 1896 for four species of Vittaria and one each of Monogramma and Hecistopteris and by Britton and Taylor (1902) for Vittaria lineata J. E. Smith. More recent accounts have been limited to brief descriptions (Wagner and Sharp, 1963;Nayar and Kaur, 1971).…”

mentioning

confidence: 99%

Gemmiferous Fern Gametophytes—vittariaceae

Farrar

1974

American J of Botany

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“…The reasons for believing this are three-fold: First, all the gametophytes of Vittariaceae for which at least some published morphological data is available (18 species representing the genera Ananthacorus, Anetium, Hecistopteris, Vittaria, Radiovittaria, Haplopteris, Antrophyum, Polytaenium, Scoliosorus, and Vaginularia;see Goebel 1888see Goebel , 1896Britton & Taylor 1902;Troll 1932;Stokey 1951;Atkinson & Stokey 1964;Farrar 1974Farrar , 1978and Crane 1997) are ribbon-shaped with multiple marginal meristems that frequently dichotomize (gametophytes of most fern species are heart-shaped, unless old or damaged, with a single recessed apical notch meristem). These features are consistent with a creeping, branching, mat or weftforming habit and a perennial existence.…”

Section: Independent Gametophytesmentioning

confidence: 99%

“…Second, gametophytes of all but one of the 18 species known (the exception being Ananthacorus angustifolius (Sw.) Underw. & Maxon) also produce gemmae by which they can propagate themselves asexually (Goebel 1888 and1896;Troll 1932;Britton & Taylor 1902;Hughes 1971;Emigh & Farrar 1977;Farrar 1974Farrar & 1978Sheffield & Farrar 1988;Crane 1997). Reproduction by gemmae enables the gametophyte generation of any species to maintain a presence (and a particular genotype) in a new area, beyond that currently tolerated by the sporophyte generation, even if the original colonizing gametophyte does eventually die.…”

Section: Independent Gametophytesmentioning

confidence: 99%

Considerations for a revision of the fern family Vittariaceae for Flora Malesiana

Lindsay¹

2003

Telopea

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The family is particularly well represented in Malesia but the number of species present and the genera in which they should be recognised is currently uncertain. This paper explains why. Three factors are discussed: the impact of new molecular data on the traditional concepts of genera in the Vittariaceae; the uncertain taxonomic position of the monotypic (and Malesian endemic) genus Rheopteris; and the possibility that unrecorded species, including undescribed ones, exist within the region only as gametophytes.

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“…THE PRODUCTION of gemmae by fern gametophytes of the family Vittariaceae has been described by Goebel (1888), Britton and Taylor (1902) and more recently by Farrar (1974Farrar ( , 1978. The gemmae are dispersable vegetative units which may develop into new gametophytes, or under the influence of older gametophytes, may produce antheridia, thus functioning as dispersable male plants (Emigh and Farrar, 1977).…”

mentioning

confidence: 94%

Cryo Sem Examination of Gemma Formation in Vittaria Graminifolia

Sheffield

Farrar

1988

American J of Botany

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Production of gemmae by gametophytes of Vittaria entails regularity of pattern relevant to systematic comparisons and unusual cellular differentiation relevant to studies of cellular morphogenesis. Cryo SEM allows critical three dimensional analysis of these delicate structures. In Vittaria graminifolia, gemmifer cells initiated by the apical meristem typically support two gemma pairs with the terminal gemma of each pair oriented at right angles to the subterminal gemma. Mature gemmae consist of a uniseriate filament of four body cells with rhizoid primordial cells at each end. Cellular differentiation during gemma production includes growth from specific, localized areas, constricted connections between cells, reorientation of the polarity of cell growth, temporary suppression of cell growth and division, abscission between cells, and deposition of surface material on mature gemmae.

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The life history of Vittaria lineata

Abstract: Page 12, 19th line from top, for mother cell of the embryo sac, read embryo sac cell.

Cited by 10 publications

References 0 publications

Gemmiferous Fern Gametophytes—vittariaceae

Gemmiferous Fern Gametophytes—vittariaceae

Considerations for a revision of the fern family Vittariaceae for Flora Malesiana

Cryo Sem Examination of Gemma Formation in Vittaria Graminifolia

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