Croissance rythmique endogène de la feuille de <i>Guarea guidonia</i> (Méliacées): Étude préliminaire expérimentale

Miesch, R.; Barnola, P.

doi:10.1139/b93-062

Cited by 5 publications

(4 citation statements)

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“…I observed similar juvenile leaf form in seedlings of C. weinlandii and vigorous sucker shoots of C. ceramicus, C. macranthus and C. trichocladus . Juvenile leaves with a terminal pinna were also reported in the related Guarea (Steingraber & Fisher, 1986; Miesch & Barnola, 1993). Some vigorous shoots may produce juvenile leaf form, similar to the reversion to a juvenile phase reported in other dicotyledons (Lee & Richards, 1991).…”

Section: Discussionmentioning

confidence: 83%

“…Some Chisocheton species have the seemingly bizarre feature of rachis – borne buds that produce flowers and shoots (Harms, 1917; Fisher & Rutishauser, 1990). The leaf of Guarea has the ability to root after detachment and to continue growing for one or more years (Fisher, 1992; Miesch & Barnola, 1993). These features are unusual and, taken by themselves, might support the concepts of ‘fuzzy morphology’ or ‘partial homology’ offered by Rutishauser & Isler (2001), Rutishauser & Sattler (1985, 1989), and Sattler & Jeune (1992).…”

Section: Discussionmentioning

confidence: 99%

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Indeterminate leaves of Chisocheton (Meliaceae): survey of structure and development

Fisher

2002

Botanical Journal of the Linnean Society

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Pinnately compound leaves in the Malesian genus Chisocheton (Meliaceae) have leaf-tip buds that continue to produce new pinnae (leaflets) periodically for many years. Juvenile leaves form a terminal pinna in place of the leaf-tip bud found in adult leaves. The histology of an old leaf-tip bud is similar to the entire leaf primordium in other species of Meliaceae with large pinnate leaves (e.g. Chukrasia and Dysoxylum) which serve as examples of more typical leaves. Pinna initiation from this meristem continues after the first stage of leaf expansion as seen in the relatively constant number of pinna primordia in a large sampling of leaf-tip buds of varying ages. Structure and development are compared in leaves of nine species of Chisocheton, out of a total of approxiamtely 50 species in the genus. Species having small leaves (e.g. C. pentandrus) show more branch-like, indeterminate leaf growth as compared with species with large leaves (e.g. C. macranthus). The structure and development of leaves of Chisocheton are like the similar indeterminate leaves of the American and African genus Guarea. Some authors have used the indeterminate leaves of Chisocheton and Guarea as examples of intermediate organs showing 'fuzzy morphology' or 'partial homology.' Nevertheless, these unusual organs are considered here as being homologous with leaves of other Meliaceae based on their position, histology and ontogeny.

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Section: Discussionmentioning

confidence: 83%

Section: Discussionmentioning

confidence: 99%

Indeterminate leaves of Chisocheton (Meliaceae): survey of structure and development

Fisher

2002

Botanical Journal of the Linnean Society

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“…Leaves share developmental processes with stems. In Chisocheton and Guarea (Meliaceae) there are compound leaves that show indeterminate growth combined with seasonal growth increments due to an apical meristem at the leaf tip (Fisher and Rutishauser, 1990 ;Miesch and Barnola, 1993). Thus, such ' leaves ' share developmental processes with distichous shoots.…”

Section: Rele Ance Of Continuum and Process Morphologymentioning

confidence: 99%

The Fundamental Relevance of Morphology and Morphogenesis to Plant Research

Sattler¹

1997

Annals of Botany

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Plant morphology, including morphogenesis, remains relevant to practically all disciplines of plant biology such as molecular genetics, physiology, ecology, evolutionary biology and systematics. This relevance derives from the fact that other disciplines refer to or imply morphological concepts, conceptual frameworks of morphology, and morphological theories. Most commonly, morphology is equated with classical morphology and its conceptual framework. According to this, flowering plants and certain other taxa are reduced to the mutually exclusive categories of root, stem (caulome) and leaf (phyllome). This ignores the fact that plant morphology has undergone fundamental conceptual, theoretical and philosophical innovation in recent times. These changes, when recognized, can fundamentally affect research in various disciplines of plant biology. They may even change the questions that are asked and thus may affect the direction of future research. If, for example, plant diversity and evolution are seen as a dynamic continuum, then compound leaves can be seen as intermediate between simple leaves and whole shoots. Recent results in molecular genetics support this view. Phylogenetically, this could mean that compound leaves are the result of developmental hybridization, i.e. partial homeosis. Many other examples are given to illustrate the relevance and potential impact of basic conceptual and theoretical innovations in plant morphology.

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“…Some leaves are, however, perennial and possess an apical meristem that continues to produce new leaflets as the leaf elongates (indeterminate growth). This is the case in the tropical genera Guarea and Chisocheton (Corner, 1964;Fisher, 1984;Fisher and Rutishauser, 1990;Miesch and Barnola, 1993). Recent evidence has also shown that determinate pinnately compound leaves may also resemble stems in their early development (Sattler and Rutishauser, 1992;Jeune and Lacroix, 1993;Lacroix and Sattler, 1994;Lacroix, 1995).…”

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confidence: 95%

Allometry of axis length, diameter, and taper in the devil's walking stick (Aralia spinosa; Araliaceae)

Briand

Daniel

Wilson

et al. 1998

American J of Botany

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The allometry of axis length, diameter, and taper is described for the trunk, rachis, and rachilla of nonbranching ramets of Aralia spinosa. Significant log-linear relationships were found between length and diameter for all axis categories, and in all cases, scaling was negatively allometric. Linear models best described the relationship between length and diameter for the rachis and rachilla, while a quadratic model best described this relationship for the trunk. During the trunk-building stage, the safety factors for trunk height were size dependent, with larger trunks exceeding their predicted critical buckling height. Taper was described by a linear relationship between diameter and position along the axis for all axis categories. All rachises and rachillas sampled exhibited taper along the length of the axis, however, only 51% of the trunks showed continuous taper. The trunk was less tapered than the rachis, but no differences in taper were found between the trunk and the rachilla, or the rachis and the rachilla. In unbranched ramets the large bipinnately compound leaves occupy the space normally occupied by lateral branches. We suggest that the rachis and rachilla are functionally equivalent to branches, that is, acting as axes of exploration and exploitation of the environment.

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Croissance rythmique endogène de la feuille de Guarea guidonia (Méliacées): Étude préliminaire expérimentale

Cited by 5 publications

References 0 publications

Indeterminate leaves of Chisocheton (Meliaceae): survey of structure and development

Indeterminate leaves of Chisocheton (Meliaceae): survey of structure and development

The Fundamental Relevance of Morphology and Morphogenesis to Plant Research

Allometry of axis length, diameter, and taper in the devil's walking stick (Aralia spinosa; Araliaceae)

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