Development of the hypanthium and androecium in South American Myrtoideae (Myrtaceae)

Belsham, Stephen R.; Orlovich, David A.

doi:10.1080/0028825x.2003.9512836

Cited by 15 publications

(8 citation statements)

References 7 publications

(11 reference statements)

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“…Nevertheless, exceptions exist to these rules. Belsham & Orlovich (, ) studied androecium and hypanthium ontogeny in the Myrteola group. These studies found Lophomyrtus and Neomyrtus , two closely related New Zealand genera, to have initially a short hypanthium cup (exceptional in genera with straight stamens) with laterally and slightly incurved stamens resembling Luma apiculata ( Myrceugenia group).…”

Section: Discussionmentioning

confidence: 97%

“…As inferred by previous studies (Proença, ; Belsham & Orlovich, , ), our study demonstrates a relationship between pre‐anthesis stamen position and hypanthium extension. In general, species with an extended hypanthium have incurved stamens developing just below the hypanthial rim, suggesting that the hypanthial extension has ‘carried’ the stamens upwards (also suggested by C. E. B. Proença, pers.…”

Section: Discussionmentioning

confidence: 99%

“…stamens, filaments and anthers (Decraene & Smets, ). Descriptive studies on the development of the hypanthium and stamen behaviour in the bud show differences in these characters in various species in Myrteae (Proença & Gibbs, ; Belsham & Orlovich, , ). Proença & Gibbs () also observed differences among different genera in Myrteae, possibly as a consequence of the different arrangement of the stamen in the bud.…”

Section: Introductionmentioning

confidence: 99%

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Systematic and evolutionary implications of stamen position in Myrteae (Myrtaceae)

et al. 2015

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The taxonomy of Myrteae, the most species-rich tribe of Myrtaceae, is notoriously difficult. Although the understanding of the phylogeny has improved, the morphological characteristics that support its cladistic configuration are still unknown. The present study evaluates stamen position and anthesis type as characters of systematic and evolutionary relevance. Sixty-nine species from 41 genera across the tribe were checked using herbarium material and spirit collections. The results recognize three patterns of stamen position in the pre-anthetic bud: straight, semi-curved and strongly incurved. The three patterns of stamen position correspond to the phylogenetic structure of the tribe, supporting the topology of the clades. Incurving of stamens across the evolutionary history of Myrteae appears to be linked to hypanthium extension and leads to different anthesis types that may be related to shifts in pollination strategy. The accessibility of stamen position and its systematic consistency make this character a useful tool for field and herbarium identification, and allow the inference of relationships for taxa not yet sampled in molecular analyses.

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Systematic and evolutionary implications of stamen position in Myrteae (Myrtaceae)

et al. 2015

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“…It is now known that stamen number and size in the Myrtaceae is not predetermined. Rather, it is highly variable and the ultimate number is controlled by a diverse range of external and internal factors that can maximise or limit their production (Belsham and Orlovich 2002, 2003; Carrucan and Drinnan 2000; Orlovich et al 1996, 1998; Ronse Decraene and Smets 1991). All species may produce petaloid stamens and in some species, especially Kunzea robusta , these can be quite common.…”

Section: Charactersmentioning

confidence: 99%

A revision of the New Zealand Kunzea ericoides (Myrtaceae) complex

Lange¹

2014

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A revision of the New Zealand Kunzea ericoides complex is presented. This paper is the final of a series that has explored the systematics of the New Zealand Kunzea complex using cytological and molecular variation, as well as experimental hybridisations between postulated segregates. As a result of those studies ten species, all endemic to New Zealand, are recognised; seven of these are new. One species, Kunzea triregensis sp. nov., is endemic to the Three Kings Islands and another species Kunzea sinclairii, endemic to Aotea (Great Barrier Island). The North Island of New Zealand has seven species, Kunzea amathicola sp. nov., Kunzea salterae sp. nov., Kunzea serotina sp. nov., Kunzea robusta sp. nov., Kunzea tenuicaulis sp. nov., Kunzea toelkenii sp. nov., and Kunzea linearis comb. nov. Of these, Kunzea linearis, Kunzea salterae, Kunzea tenuicaulis and Kunzea toelkenii are endemic to the North Island, and Kunzea amathicola, Kunzea robusta and Kunzea serotina extend to the South Island which also supports one endemic, Kunzea ericoides. Typifications are published for Leptospermum ericoides A.Rich., Leptospermum ericoides var. linearis Kirk, Leptospermum ericoides var. microflorum G.Simps., Leptospermum ericoides var. pubescens Kirk, and Leptospermum sinclairii Kirk, names here all referred to Kunzea. The ecology, conservation, extent of natural hybridisation and some aspects of the ethnobotany (vernacular names) of these Kunzea are also discussed.

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“…leaf anatomy Preparation of histological samples for light microscopy (LM) followed Johansen (1940), Feder andO'Brien (1968), Ruzin (1999) and protocols previously used for Myrtaceae (Belsham & Orlovich 2003, Donato & Morretes 2009, Schmid & Baas 1984, Soh & Parnell 2011. The samples were fixed in FAA for 48 h, dehydrated through ethanol series, followed by xylene-ethanol combinations (1:3, 1:2, 1:1, 1:0) 2 h each, infiltrated and embedded in paraffin wax.…”

Section: Specimen Samplingmentioning

confidence: 99%

Leaf micromorphology and anatomy of Myrceugenia rufa (Myrtaceae). An endemic coastal shrub of north-central Chile

Retamales

Cabello²,

Serra

et al. 2015

Gayana Bot.

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Species of fleshy-fruited Myrtaceae are generally associated with humid environments and their vegetative anatomy is mainly mesophytic. Myrceugenia rufa is an endemic and rare species from arid zones of the coast of central Chile and there are no anatomical studies regarding its leaf anatomy and environmental adaptations. Here we describe the leaf micromorphology and anatomy of the species using standard protocols for light and scanning electron microscopy. The leaf anatomy of M. rufa matches that of other Myrtaceae, such as presence of druses, schizogenous secretory ducts and internal phloem. Leaves of M. rufa exhibit a double epidermis, thick cuticle, abundant unicellular hairs, large substomatal chambers covered by trichomes and a dense palisade parenchyma. Leaf characters of M. rufa confirm an anatomical adaptation to xerophytic environments. Keywords:Hairs, leaf anatomy, Myrceugenia rufa, Myrtaceae, SEM, xerophytic characters. RESUMENLas especies con frutos carnosos de Myrtaceae están generalmente asociadas a ambientes húmedos y su anatomía vegetativa es principalmente mesofítica. Myrceugenia rufa es una especie rara y endémica de lugares secos de la costa de Chile central y no hay estudios anatómicos de sus hojas en términos de adaptaciones ambientales. En este artículo describimos la micromorfología y anatomía foliar de la especie usando protocolos estándar para microscopia óptica y electrónica de barrido. La anatomía foliar de M. rufa es similar a otras especies de Myrtaceae, en lo que respecta a presencia de drusas, canales secretores esquizógenos y floema interno. Las hojas de M. rufa tienen una epidermis doble, cutícula gruesa, pelos unicelulares abundantes, cavidades subestomáticas amplias y cubiertas por tricomas, y un denso parénquima en empalizada. Los caracteres foliares de la especie confirman una afinidad morfoanatómica a ambientes xerofíticos.

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Development of the hypanthium and androecium in South American Myrtoideae (Myrtaceae)

Cited by 15 publications

References 7 publications

Systematic and evolutionary implications of stamen position in Myrteae (Myrtaceae)

Systematic and evolutionary implications of stamen position in Myrteae (Myrtaceae)

A revision of the New Zealand Kunzea ericoides (Myrtaceae) complex

Leaf micromorphology and anatomy of Myrceugenia rufa (Myrtaceae). An endemic coastal shrub of north-central Chile

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