Biosystematics of the genus Dahlstedtia Malme (Leguminosae, Papilionoideae, Millettieae)

Teixeira, Simone de Pádua; Ranga, Neusa Taroda

doi:10.1590/s0100-84042004000100005

Cited by 7 publications

(7 citation statements)

References 5 publications

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“…Dahlstedtia has generally been considered to be monotypic (Hutchinson 1964, Geesink 1981, Vanni & Rodríguez 1999, however Burkart (1957) considered it to comprise of two species. The latter view was supported by a biosystematic study, in which experimental pollinations showed that the two species are intersterile and are geographically isolated (Teixeira & Ranga 2004). The two species however share a number of features such as similar stem and root anatomy (Teixeira & Gabrielli 2000), embryogenesis (Teixeira et al 2001) and floral development (Teixeira et al unpublished data).…”

Section: Resultsmentioning

confidence: 95%

Oil glands in the Neotropical genus Dahlstedtia Malme (Leguminosae, Papilionoideae, Millettieae)

Teixeira¹,

Rocha²

2009

Rev. bras. Bot.

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-(Oil glands in the Neotropical genus Dahlstedtia Malme -Leguminosae, Papilionoideae, Millettieae). Dahlstedtia pentaphylla (Taub.) Burkart and D. pinnata (Benth.) Malme belong to the Millettieae tribe and are tropical leguminous trees that produce a strong and unpleasant odour. In the present work, we investigated the distribution, development and histochemistry of foliar and floral secretory cavities that could potentially be related to this odour. The ultrastructure of foliar secretory cavities were also studied and compared with histochemical data. These data were compared with observations recorded for other species of Millettieae in order to gain a phylogenetic and taxonomic perspective. Foliar secretory cavities were only recorded for D. pentaphylla. Floral secretory cavities were present in the calyx, wings and keels in both species; in D. pinnata they also were found in bracteoles and vexillum. Such structures were found to originate through a schizogenous process. Epithelial cells revealed a large amount of flattened smooth endoplasmic reticula, well-developed dictyosomes and vacuoles containing myelin-like structures. Cavity lumen secretion stains strongly for lipids. Features of the secretory cavities studied through ultrastructural and histochemical procedures identify these structures as oil glands. Thus, if the odour produced by such plants has any connection with the accumulation of rotenone, as other species belonging to the "timbó" complex, the lipophilic contents of the secretory cavities of Dahlstedtia species take no part in such odour production. The presence, distribution patterns and frequencies of secretory structures in Dahlstedtia are taxonomically significant and may be utilized as a diagnostic character which justifies the separation of this genus into two species.Key words -anatomy, development, histochemistry, secretory cavity, ultrastructure RESUMO -(Glândulas de óleo no gênero neotropical Dahlstedtia Malme -Leguminosae, Papilionoideae, Millettieae). Dahlstedtia pentaphylla (Taub.) Burkart e D. pinnata (Benth.) Malme pertencem à tribo Millettieae e apresentam representantes arbóreos que produzem um odor forte e desagradável. Neste trabalho, foram investigados a distribuição, o desenvolvimento e a histoquímica de cavidades secretoras foliares e florais, que poderiam estar relacionadas a este odor. A ultra-estrutura das cavidades secretoras foliares também foi estudada e comparada aos resultados histoquímicos. Estes dados foram comparados a outros obtidos para espécies de Millettieae e discutidos sob perspectivas filogenética e taxonômica. Cavidades secretoras foliares foram observadas somente em D. pentaphylla. Cavidades secretoras florais foram observadas no cálice, nas alas e quilhas de ambas as espécies; em D. pinnata também foram encontradas nas bractéolas e no estandarte. As cavidades originaram-se por processo esquizógeno. As células do epitélio secretor apresentaram uma grande quantidade de retículo endoplasmático liso tubuloso, dictiossomos bem desenvolvidos e mui...

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Section: Resultsmentioning

confidence: 95%

Oil glands in the Neotropical genus Dahlstedtia Malme (Leguminosae, Papilionoideae, Millettieae)

Teixeira¹,

Rocha²

2009

Rev. bras. Bot.

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“…Only a few individuals have been found in flower (7 of 90 plants) and fruit (2 of 90 plants) throughout a six-year period of field observations (1993-1995 and 1996-2000). Most of them showed vegetative propagation (Teixeira and Ranga, 2004 Flower position vs. pollen deposition and fruit set Open-pollinated flowers were collected two days after anthesis and were assigned to three categories, according to their position in the inflorescence: apical, median and basal. Three flowers per position were utilized on nine inflorescences from three individuals.…”

Section: Study Speciesmentioning

confidence: 99%

Components of fecundity and abortion in a tropical tree, Dahlstedtia pentaphylla (Leguminosae)

Teixeira

Pereira

Ranga

2006

Braz. arch. biol. technol.

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Studies were conducted on pollination and patterns of fruit and seed production to assess the potential factors causing high fruit and seed abortion in Dahlstedtia pentaphylla (Leguminosae) through analyses of relationships between flower position in the inflorescence and ovules and seeds within ovaries and fruits, and flower, fruit and seed abortion. No differences were found in pollination and fruit set as a function of inflorescence position. There was no relationship, neither between degenerating ovules and their position within the ovary, nor betweendeveloping seed and fruit position. Maternal resource limitation related to fruits and embryos, due to the high cost of fruit production and seed maturation, was one of the factors that led to a high abortion rate in D. pentaphylla.

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“…Teixeira and Ranga (2004) have cited the small number of specimens of fruiting D. pinnata that are herbalized in scientific collections, which could indicate a relatively low fruiting rate for this species. The authors argued that this factor, in addition to its restricted distribution, render this plant a rare species.…”

Section: Reproductive Phenologymentioning

confidence: 99%

“…Malme. The species D. pinnata has only been registered in the states of Rio de Janeiro and São Paulo (Teixeira and Ranga 2004). Both species are shrubs with large, tubular flowers and striking coloring (Teixeira and Gabrielli 2000).…”

Section: Introductionmentioning

confidence: 99%

Reproductive phenology and sharing of floral resource among hummingbirds (Trochilidae) in inflorescences of Dahlstedtia pinnata (Benth.) Malme. (Fabaceae) in the Atlantic forest

Missagia

Verçoza

Alves

2014

An. Acad. Bras. Ciênc.

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The purpose of this study was to investigate the reproductive phenology and sharing of floral resource (nectar) of Dahlstedtia pinnata (Benth.) Malme. (Fabaceae), endemic of Atlantic forest, among hummingbirds. For the phenology, we looked at the presence of reproductive structures in the plants, and for floral resource sharing, the frequency of potential pollinators and foraging behaviors were examined. This study was conducted in Pedra Branca State Park, in state of Rio de Janeiro, in a dense ombrophilous forest, between August 2010 and August 2011. Flowering occurred between December 2010 and March 2011, and fruiting between April and June 2011. Hummingbirds' foraging schedules differed significantly, with legitimate visits to the flowers occurring in the morning and illegitimate visits occurring during late morning and the afternoon. Five species visited flowers, three of which were legitimate visitors: Phaethornis ruber, P. pretrei, and Ramphodon naevius. Amazilia fimbriata and Thalurania glaucopis females only visited illegitimately. Phaethornis ruber robbed nectar (78% of illegitimate visits, n=337). Ramphodon naevius, with a territorial foraging behavior and a body size bigger than that of other observed hummingbird species, dominated the floral visits, which suggests that D. pinnata is an important nourishing resource for this endemic bird of the Atlantic forest, currently globally categorized as Near Threatened.

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Biosystematics of the genus Dahlstedtia Malme (Leguminosae, Papilionoideae, Millettieae)

Cited by 7 publications

References 5 publications

Oil glands in the Neotropical genus Dahlstedtia Malme (Leguminosae, Papilionoideae, Millettieae)

Oil glands in the Neotropical genus Dahlstedtia Malme (Leguminosae, Papilionoideae, Millettieae)

Components of fecundity and abortion in a tropical tree, Dahlstedtia pentaphylla (Leguminosae)

Reproductive phenology and sharing of floral resource among hummingbirds (Trochilidae) in inflorescences of Dahlstedtia pinnata (Benth.) Malme. (Fabaceae) in the Atlantic forest

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