Recherches sur la ramification de la pousse chez le<i>Vallisneria spiralis</i>L.

Bugnon, François; Joffrin, G.

doi:10.1080/00378941.1962.10838095

Cited by 11 publications

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“…Other workers have claimed that initially a single mound of tissue was formed and that leaf and bud primordia subsequently differentiated from this (Rohrbach, 1873;Loiseau and Nougarede, 1963). Bugnon and Joffrin (1962) have recently interpreted axillary bud formation in Vallisneria in a similar manner, and consider that the subtending leaf primordium appears later than its axillary bud. In Hydrocharis, this view is probably based on a misinterpretation (in some sections) of the shoot apical meristem as the bud and vice versa, as seems to have occurred, for example, in PI.…”

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“…In plants in general, bud outgrowth is often inhibited by the shoot apex, yet in Hydrocharis the bud primordium is formed in the apical meristem itself, and following its inception grows steadily at least up to a point. In Hydrocharis and Vallisneria the question of whether the bud is formed by a dichotomy of the shoot apical meristem or is an axillary structure has evoked considerable discussion (Rohrbach, 1873;Bugnon and Joffrin, 1962;Loiseau and Nougarede, 1963). At this stage, it is probably best not to attempt to equate the buds with specific morphological categories: it is the controlling physiological factors that are of the greatest interest and importance.…”

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Observations on Leaf and Bud Formation in Hydrocharis Morsus‐ranae

Cutter

1964

American J of Botany

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Regular sequences of leaf and bud formation occur in several members of the Hydrocharitaoeae, including Hydrocharis, in which buds are normally formed in the axil of every second leaf of the phyllotactic spiral. Leaf inception begins by periclinal divisions of the inner cells of the 2-layered tunica. Bud formation, which occurs in the apical meristem itself, immediately following the inception of the sub tending leaf primordium, begins by divisions in various planes in the corpus, the 2 tunica layers remaining continuous throughout. The young bud meristem soon gives rise to a lateral bud, before leaf formation begins upon it. Because of these and other features, this species is one of considerable morphogenetic interest. Morphogenesis of the whole plant, and in particular the factors controlling the regular sequence of leaf and bud formation, have been and are being investigated experimentally.

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Observations on Leaf and Bud Formation in Hydrocharis Morsus‐ranae

Cutter

1964

American J of Botany

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“…This study was undertaken for three reasons. ( 1) There have been no previous studies of the overall morphology and development of V. americana, although earlier workers published such accounts of V. spiralis (Picot-Lapeyrouse, 1799;.Tussieu, 1807;Richard, 1812;Quekett, 1843;Chatin, 1854Chatin, , 1855Irmisch, 1865;Rohrbach, 1871;Muller, 1878;Bugnon andJoffrin, 1962, 1963). Prior investigators studied mainly specific aspects of V. americana. (2) Important aspects of symmetry and development have been studied inadequately or not at all for any species of Valllsneria. For example, previous workers failed to provide convincing evidence as to whether the vegetative plant body is sympodial, monopodial, or both.…”

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Symmetry and Development of Pistillate Vallisneria Americana (Hydrocharitaceae)

Wilder

1974

American J of Botany

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Pistillate Vallisneria americana produces upright vegetative axes and prostrate stolons and develops in a manner fundamentally similar to that of Limnobium spongia (Hydrocharitaceae) and certain other taxa of Alismatidae. The cauline portions of pistillate V. americana branch solely by the bifurcation of apical meristems, and their mode of branching offers clues concerning the nature of the plant body. The upright axes are interpreted to have sympodial growth, whereas at least certain stolons appear to be entirely monopodial. The upright axes are either typical vegetative axes or turions; and of these, only turions appear to survive the winter in at least one locality. Pistillate V. americana produces intravaginal squamules (multi‐seriate trichomes) although they appear reduced in number relative to those in certain other hydrocharitaceous and alismatid taxa. Vallisneria americana exhibits a notable degree of mirror image symmetry which differs somewhat from that of Limnobium spongia.

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“…By this means it is possible to build up a complete series of sections illustrating leaf and bud ontogenesis ( Fig. Bugnon and Joffrin (1962) have recently interpreted axillary bud formation in Vallisneria in a similar manner, and consider that the subtending leaf primordium appears later than its axillary bud. Such a series demonstrates unequivocally that in the material examined the inception of the leaf primordium precedes that of the bud borne in its axil, although only slightly.…”

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“…In Hydrocharis and Vallisneria the question of whether the bud is formed by a dichotomy of the shoot apical meristem or is an axillary structure has evoked considerable discussion (Rohrbach, 1873;Bugnon and Joffrin, 1962;Loiseau and Nougarede, 1963). In Hydrocharis and Vallisneria the question of whether the bud is formed by a dichotomy of the shoot apical meristem or is an axillary structure has evoked considerable discussion (Rohrbach, 1873;Bugnon and Joffrin, 1962;Loiseau and Nougarede, 1963).…”

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Observations on Leaf and Bud Formation in Hydrocharis Morsus-Ranae

Cutter

1964

American Journal of Botany

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Regular sequences of leaf and bud formation occur in several members of the Hydrocharitaceae, including Hydrocharis, in which buds are normally formed in the axil of every second leaf of the phyllotactic spiral. Leaf inception begins by periclinal divisions of the inner cells of the 2‐layered tunica. Bud formation, which occurs in the apical meristem itself, immediately following the inception of the subtending leaf primordium, begins by divisions in various planes in the corpus, the 2 tunica layers remaining continuous throughout. The young bud meristem soon gives rise to a lateral bud, before leaf formation begins upon it. Because of these and other features, this species is one of considerable morphogenetic interest. Morphogenesis of the whole plant, and in particular the factors controlling the regular sequence of leaf and bud formation, have been and are being investigated experimentally.

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Recherches sur la ramification de la pousse chez leVallisneria spiralisL.

Cited by 11 publications

References 2 publications

Observations on Leaf and Bud Formation in Hydrocharis Morsus‐ranae

Observations on Leaf and Bud Formation in Hydrocharis Morsus‐ranae

Symmetry and Development of Pistillate Vallisneria Americana (Hydrocharitaceae)

Observations on Leaf and Bud Formation in Hydrocharis Morsus-Ranae

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