Methods of Melissopalynology

Louveaux, J.; Maurizio, A.; Vorwohl, G.

doi:10.1080/0005772x.1978.11097714

Cited by 1,341 publications

(1,097 citation statements)

References 27 publications

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“…A análise qualitativa foi baseada nos trabalhos de BARTH (1970a,b,c; e nas informações obtidas no campo, ao passo que a análise quantitativa foi realizada por meio de contagem consecutiva de 200 grãos de pólen/repetição/amostra (RANTA e LUNDBERG, 1981; CAMILLO e GARÓFALO, 1989), determinando-se as porcentagens e classes de ocorrência que, segundo LOUVEAUX et al (1978), são as seguintes: pólen dominante (> 45% do total de grãos), pólen acessório (de 15% a 45%), pólen isolado importante (de 3% a 14%) e pólen isolado ocasional (< 3%).…”

Section: Methodsunclassified

Espectro polínico de amostras de mel de Apis mellifera L., coletadas na Bahia

et al. 2000

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Section: Methodsunclassified

Espectro polínico de amostras de mel de Apis mellifera L., coletadas na Bahia

et al. 2000

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“…Pollen analysis was carried out for the purpose of confirming the origin of the honey samples, i.e., that they were Acacia. The morphological appearance of the pollens of the Acacia species and the honey samples was determined according to the Louveaux method for pollen analysis (Louveaux et al 1978). The pollens of the honey were photographed and compared to the pollens of three Acacia species: Acacia tortilis (Samar), Acacia ehrenbergiana (Salam), and Acacia arabica.…”

Section: Methodsmentioning

confidence: 99%

Some physiochemical properties of Acacia honey from different altitudes of the Asir Region in Southern Saudi Arabia

Mohammed¹,

Aamadawi²,

Alfifi³

et al. 2017

Czech J. Food Sci.

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The physiochemical properties of six Acacia honey samples taken from three different altitudes in the Asir region were determined. The means of all the studied parameters were within the international standards and were comparable to previous studies (0.11 ± 0.08% for ash, 10.93 ± 1.97% for water, 3.56 ± 0.19 for pH, 38.63 ± 17.17 meq/kg <br /> for acidity, 659.51 ± 324.98 μS/cm for conductivity, and 1.45 ± 0.02 for specific gravity). Comparison of the mean values of the parameters at the different altitudes revealed gradual increases with increasing altitude, except for ash and specific gravity. Significant differences were seen in ash and water percentages, acidity, and conductivity. While the mean values of the studied physiochemical properties of the Acacia honey samples were within the ranges of international standards, the honey produced at high altitudes exhibited variable physiochemical properties.

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“…Pollen grains from flower buds in pre-anthesis stage were acetolyzed according to the method of Erdtman (Louveaux et al 1978). Our analysis used five to seven pollen grains per bud, which had been each sampled from a distinct cluster.…”

Section: Methodsmentioning

confidence: 99%

“…In order to be sampled, an inflorescence should exhibit at least one open flower and at least one flower bud in pre-anthesis stage. The plant material was kept in 70% ethanol and pollen grains kept in glacial acetic acid (Louveaux et al 1978) until further use.…”

Section: Methodsmentioning

confidence: 99%

Distyly and variation in floral traits in natural populations of Psychotria ipecacuanha (Brot.) Stokes (Rubiaceae)

Rossi¹,

Oliveira²,

Vieira³

2005

Rev. bras. Bot.

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-(Distyly and variation in floral traits in natural populations of Psychotria ipecacuanha (Brot.) Stokes (Rubiaceae)). Psychotria ipecacuanha is a perennial, medicinal herb that grows in clusters in the understory of humid, shady areas of the Atlantic Rain Forest of southeastern Brazil. The present study characterized the variation in floral traits among 35 clusters from three natural populations of this plant species. Field observations showed that the clusters are isomorphic, that is, a given cluster will either set long-styled or short-styled flowers. Stigmas and anthers are reciprocally placed in each morph, a dimorphism characteristic of distyly. The populations are isoplethic, that is, a given population exhibits an equilibrium 1:1 ratio of floral morphs. Morphometric analyses revealed that anther length, stigma length, corolla diameter, and pollen grain diameter were consistently greater in short-styled flowers, regardless of the population investigated. Significant differences for floral traits in the short-styled morph were found among populations. Floral traits in the long-styled morph also showed some significant differences among populations, but not for stigma height and corolla length. Controlled pollinations carried out in natural populations showed that fruit production was higher after inter-morph pollination. Nevertheless, observations of pollen tube growth in style, and also fruit production after spontaneous self-pollination and intra-morph pollination, indicated partial intramorph compatibility in this plant species.Key words -distyly, floral morphology, ipecac, medicinal plants, Psychotria ipecacuanha RESUMO -(Distilia e variação das características florais em populações naturais de Psychotria ipecacuanha (Brot.) Stokes (Rubiaceae)). Psychotria ipecacuanha é uma espécie medicinal que se desenvolve em agregados perenes, denominados reboleiras, em áreas úmidas e sombrias no sub-bosque da Floresta Atlântica. O presente trabalho caracterizou a variação de atributos florais em 35 reboleiras de três populações naturais desta espécie. Observações de campo mostraram que as reboleiras são isomórficas, isto é, apresentam apenas uma forma floral (brevistila ou longistila). Estigmas e anteras estão posicionados reciprocamente em cada forma floral, um dimorfismo característico de distilia. As populações são isopléticas, isto é, apresentam razão equilibrada (1:1) entre as formas florais. Análises comparativas da morfometria floral revelaram que, independente da população investigada, as flores brevistilas apresentaram maiores médias de comprimento da antera, comprimento do estigma, diâmetro da corola e diâmetro do grão de pólen. Flores brevistilas apresentaram diferenças interpopulacionais significativas com relação aos atributos florais investigados. Flores da forma longistila também apresentaram diferenças interpopulacionais significativas, exceto quanto à altura dos estigmas e ao comprimento da corola. Polinizações controladas conduzidas em condições naturais mostraram que a produção de fruto...

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Methods of Melissopalynology

Cited by 1,341 publications

References 27 publications

Espectro polínico de amostras de mel de Apis mellifera L., coletadas na Bahia

Espectro polínico de amostras de mel de Apis mellifera L., coletadas na Bahia

Some physiochemical properties of Acacia honey from different altitudes of the Asir Region in Southern Saudi Arabia

Distyly and variation in floral traits in natural populations of Psychotria ipecacuanha (Brot.) Stokes (Rubiaceae)

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