Etude comparée de la vascularisation dans les ramifications de l’appareil végétatif et du cône femelle chez Stachycarpus spicata R. Brown, Podocarpacées

Morvan, Jean

doi:10.1016/s0367-2530(17)31988-6

Cited by 4 publications

(5 citation statements)

References 9 publications

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“…When previous studies have been sufficiently detailed, such as those of Morvan (1983) for Prumnopitys taxifolia and Jain (1978) for Podocarpus neriifolius , they reveal certain variations on a common theme. An ascending vascular supply rises to a more or less well‐developed terminal chalazal knob (misleadingly termed the ‘apical knob’ by Sinnott, 1913), which Gibbs (1912) and Sahni & Mitra (1927) regarded as homologous with the distal end of the ovuliferous scale.…”

Section: Discussionmentioning

confidence: 94%

“…The papers by Florin (1951, 1954) did not significantly advance earlier knowledge, at least concerning the Podocarpaceae. Studies of the vasculature of single species of Prumnopitys and Afrocarpus have been undertaken by Morvan (1983: P. taxifolia , as Stachycarpus spicata (R.Br.) Tiegh.)…”

Section: Discussionmentioning

confidence: 99%

“…However, had younger stages been used, differentiation of the epimatium might have been possible. Previous workers such as Morvan (1983) have equated the entire region that we studied, from epidermis to the outer boundary of the sclerotesta, with the epimatium. Our previous work with Acmopyle (Mill et al ., 2001) suggests that, in that genus at least, this is unlikely and that only some of this tissue in Acmopyle is derived from the epimatium, the remainder being derived from the ovule.…”

Section: Discussionmentioning

confidence: 99%

“…ex D. Don) de Laub. : Morvan, 1983) or compact (e.g. Microcachrys : Morvan, 1990), but in the majority they are borne singly, as in Afrocarpus and most species of Podocarpus .…”

Section: Introductionmentioning

confidence: 99%

“…P. ferruginea and all species of Afrocarpus have single‐ovulate cones and the terms ‘ovule’ and ‘cone’ are thus synonymous (though not homologous), whereas P. andina and P. taxifolia have multi‐ovulate cones in which the female fertile shoot bears several ovules in a spicate ‘infructescence’, which in toto has been called the cone by most previous workers (e.g. Morvan, 1983; Tomlinson, 1992). In all four species studied, we examined single reproductive units.…”

Section: Introductionmentioning

confidence: 99%

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Comparative anatomy and morphology of fertile complexes of Prumnopitys and Afrocarpus species (Podocarpaceae) as revealed by histology and NMR imaging, and their relevance to systematics

Mill

Möller

Glidewell³

et al. 2004

Botanical Journal of the Linnean Society

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Fertile complexes (individual reproductive units of ovulate cones) of three Prumnopitys species and Afrocarpus falcatus (Podocarpaceae) were subjected to histological examination and non-destructive NMR imaging. The latter technique allowed the display, frame-by-frame analysis and electronic 'dissection' of internal structures such as the number and courses of vascular traces and resin canals and their morphology. Characters of these internal structures distinguished all three Prumnopitys species from each other and thus were shown to be taxonomically diagnostic. Fertile complexes of Prumnopitys andina and P. taxifolia were most similar, possessing simple vascular traces and few unbranched resin canals. Those of P. ferruginea were very different and possessed an interconnected network of resin ducts within the sarcotesta. These findings are congruent with relationships inferred from molecular phylogenetic studies, in which two subclades were recovered within Prumnopitys. The anatomy of the female fertile complexes of Afrocarpus falcatus was very distinct from all Prumnopitys species analysed. Its most distinctive feature was the existence of a complex network of radial vascular strands originating from within the outer layers of the sarcotesta and penetrating the inner layers of the fertile complex. The surface texture and morphology of the sclerotesta of the seed was also unique to each species.

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Section: Discussionmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…ex D. Don) de Laub. : Morvan, 1983) or compact (e.g. Microcachrys : Morvan, 1990), but in the majority they are borne singly, as in Afrocarpus and most species of Podocarpus .…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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