A identidade do Timbó-verdadeiro: Deguelia utilis (A.C.Sm.) A.M.G.Azevedo (Leguminosae -- Papilionoideae)

Tozzi, Ana Maria Goulart de Azevedo

doi:10.1590/s0034-71081998000300016

Cited by 7 publications

(6 citation statements)

References 3 publications

(6 reference statements)

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“…Sm.) A. M. G. Azevedo, which is considered to be the true timbó, and has been used in the Amazon region as a toxic substance for fish (Tozzi 1998). Many individuals of Dahlstedtia were discovered to be purposefully cut down inside otherwise standing forest.…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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

Teixeira¹,

Rocha²

2009

Rev. bras. Bot.

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“…Já em Cannabis sativa, os alcalóides foram detectados apenas nos laticíferos de órgãos aéreos (Furr & Mahlberg, 1981). Em Leguminosae, várias espécies são conhecidas pela presença de substâncias tóxicas nas raízes, como aquelas incluídas no "complexo timbó", consideradas ictiotóxicas devido à presença de rotenóides (Tozzi, 1998) e fl avonóides (Garcez et al, 1988). Muitas das espécies deste complexo já são utilizadas na pecuária e na farmacologia.…”

Section: Discussionunclassified

Estudo farmacobotânico de duas espécies de Anileira (Indigofera suffruticosa e Indigofera truxillensis, Leguminosae) com propriedades farmacológicas

Barros¹,

Teixeira²

2008

Rev. bras. farmacogn.

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“…Rotenone is also used in powdered form to treat scabies and head lice in humans, as well as parasitic mites on chickens, livestock, and pet animals. ,, It is also used to reduce or eradicate invader fish populations. This is possible because the bioactive agent inhibits cellular respiration in most living organisms. , However, mammals are usually not affected because of its inefficient absorption into the body. Despite this, the use of large quantities of rotenone can cause health problems …”

Section: Introductionmentioning

confidence: 99%

Experimental Phase Equilibrium Data for Rotenone in Supercritical Carbon Dioxide

et al. 2019

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In this paper, we report data for the phase transition of the binary [rotenone (1) + CO2 (2)] system obtained visually using the static synthetic indirect method and a variable-volume cell at temperatures between 303 and 343 K and pressures near 20 MPa. The molar fraction varied from 1.0 × 10–5 to 2.75 × 10–5. For a molar fraction of rotenone greater than 2.75 × 10–5, the phase transition data could not be measured at pressures of 30 MPa because of the experimental limitations of the equipment. The pressure limitation arose because of the difficulty in solubilizing the system where the solubilization occurs close to or above the limits of the experimental apparatus (30 MPa). The transition of the system was identified as the solid–fluid type, and the phase transition profiles are similar. The Peng–Robinson equation of state (PR-EoS) with the classical mixing rule was used to correlate the experimental data to theory, and excellent agreement was found between the experimental and calculated values.

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A identidade do Timbó-verdadeiro: Deguelia utilis (A.C.Sm.) A.M.G.Azevedo (Leguminosae -- Papilionoideae)

Cited by 7 publications

References 3 publications

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

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

Estudo farmacobotânico de duas espécies de Anileira (Indigofera suffruticosa e Indigofera truxillensis, Leguminosae) com propriedades farmacológicas

Experimental Phase Equilibrium Data for Rotenone in Supercritical Carbon Dioxide

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