Genetics of cytosolic phosphoglucose isomerase (PGI) variation in the Amazonian tree Pseudobombax munguba (Bombacaceae)

Gribel, Rogério; Abbott, Richard J.

doi:10.1038/hdy.1996.76

Cited by 6 publications

(4 citation statements)

References 44 publications

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“…To estimate the proportion of selfed and outcrossed seeds in fruits resulting from mixed-and open-pollinations, we used starch gel electrophoresis to characterize tree 1, tree 2 and their seedlings at the cytosolic phosphoglucose isomerase (PGI) locus. Seeds from fruits sired by mixed-and open-pollinations were germinated in a glass house and leaf samples of those seedlings, tree 1 and tree 2 were assayed for the PGI locus as described in Gribel & Abbott (1996). Trees 1 and 2 are neighbouring trees (15 m apart) which flowered in isolation and concomitantly in August 1992, when no other flowering trees were found in the study area, except tree 15 located 60 km away.…”

Section: Determination Of Male Parentage Of the Seedlingsmentioning

confidence: 99%

Flowering phenology and pollination biology of Ceiba pentandra (Bombacaceae) in Central Amazonia

Gribel¹,

Gibbs

Queiróz³

1999

J. Trop. Ecol.

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121

114

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The flowering and fruiting phenology, floral biology, pollination ecology, and breeding system of the emergent tree Ceiba pentandra were studied in the Brazilian Central Amazon. Of the 21 trees studied, 17 flowered once or twice during the 6-y study period. The mass flowering and relatively high production of nectar per flower (mean of 310 µl) resulted in a high nectar production (over 200 l per tree per season). Flowers were visited by a wide range of nocturnal (bats, marsupials, night monkeys, hawk moths) and diurnal (bees, wasps, hummingbirds) animals, but only phyllostomid bats, especially Phyllostomus hastatus and Phyllostomus discolor, played a relevant role promoting cross-pollination. Pollinations which occurred in the early morning by diurnal floral visitors were ineffective since pollen tubes did not traverse the style and reach the ovary before stylar abscission. Despite the apparently normal growth of the self-pollen tubes, controlled pollinations carried out in one tree revealed no fruit set by selfing and 16.8% fruit set by crossing. Progeny analysis from this 'self-incompatible' tree using isozyme markers showed that fruits resulting from mixed-pollination (i.e., 50% self-plus 50% crosspollen on the stigma) set only 1.6% of selfed seeds. The percentage of outcrossed seeds in fruits resulting from open-pollination in two neighbouring planted trees, which flowered in isolation and concomitantly, was estimated at 91% and 71%. Two isolated trees did not set any fruits despite massive flowering, whereas two others set large quantities of seed, supporting data in the literature stating that variable degrees of self-fertility may occur in this species. RESUMO. A fenologia de floração e de frutificação, a biologia floral, a ecologia de polinização e o sistema reprodutivo da árvore emergente Ceiba pentandra foram estudados na Amazônia Central Brasileira. Dezessete das 21 árvores estudadas (doze nativas e nove plantadas de sementes de procedência desconhecida) floriram uma ou duas vezes cada uma durante os seis anos do estudo. A maior parte das árvores nativas floriu massivamente somente em 1993 e 1996, enquanto que algumas das árvores plantadas floriram massivamente somente em 1992 e 1997. 247

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Section: Determination Of Male Parentage Of the Seedlingsmentioning

confidence: 99%

Flowering phenology and pollination biology of Ceiba pentandra (Bombacaceae) in Central Amazonia

Gribel¹,

Gibbs

Queiróz³

1999

J. Trop. Ecol.

Self Cite

121

114

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“…The tree, shown in Fig. 1a, is called Mungubeira (Pseudobombax munguba) and is a dominant tree species in the floodplain forests of the Amazon region (Gribel and Abbott 1996). Munguba fiber is extracted from the stem of the tree, i.e., from the bark, as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Polymeric biocomposites of poly (butylene adipate-co-terephthalate) reinforced with natural Munguba fibers

2014

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In this work, polymeric biocomposites of poly (butylene adipate-co-terephthalate), PBAT, were reinforced with Munguba fibers (Pseudobombax munguba). This tree is found in great abundance in the marshy areas of the Amazon forest. The motivation for using this fiber in polymer composites comes from the fact that although research for this fiber has not been reported in the scientific literature, it is commonly used by the local population because its bark is strong and flexible. Most important is that the extraction of Munguba fibers does not damage the supplier tree because as it is extracted from the bark, its regeneration starts as it is removed. The fibers were chemically treated by mercerization/acetylation and evaluated by Fourier transform infrared spectroscopy, thermogravimetric analysis and tensile tests. The Munguba fiber presented mechanical properties similar to those of other natural fibers traditionally used in composites, and the chemical treatment provided improvements of its thermal stability and stiffness. The biocomposites showed a better elastic modulus in relation to the pure PBAT. The addition of fibers caused changes in the T g , T m and T c of PBAT as observed by differential scanning calorimetry analysis. The Russel, Halpin-Tsai and Maxwell models were employed to provide the theoretical elastic modulus of the biocomposites.

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“…A Mungubeira é uma espécie de árvore da família Malvaceae sensu latu, subgrupo das famílias Grewioideae, Byttnerioideae, Sterculioideae, Tilioideae, Dombeyoideae, Brownlowioideae, Helicteroideae, Malvoideae e Bombacoideae, típicas das várzeas amazônicas [6]. Sendo esta a única espécie do gênero encontrada em toda extensa planície inundada que se espalha desde a Amazônia peruana e colômbiana, até as planícies da foz do Rio Amazonas na amazonia brasileira [7].…”

Section: Introductionunclassified

Matrix polyester composite strengthened by munguba fiber (pseudobombax munguba) Amazon

Lopes¹,

Leite²,

Fujiyama³

et al. 2015

ITEGAM- Journal of Engineering and Technology for Industrial Applications (ITEGAM-JETIA)

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The diversity of the species of the Amazon flora makes this region a large barn of plants suitable for the development of new polymeric composites. The article in question aimed to evaluate the mechanical properties of polyester composites reinforced by short fibers of Munguba from Amazon not only randomly arranged but also continuous and aligned fibers. For the evaluation of mechanical properties tensile test were used. The used method was qualitative and quantitative, comparing parameters obtained in composites developed by other literature. The results showed that for the investigated materials, the tensile strength increased with fiber length (5 mm-9.61 (MPa) 10 mm-12.16 (MPa) and 15mm-19.91 (MPa)) and when they remained better aligned, uniform and occupying a larger contact area in the matrix, the comportment was better; and composites with continuous and aligned fibers revealed the most satisfactory mechanical performance (54,66MPa).

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Genetics of cytosolic phosphoglucose isomerase (PGI) variation in the Amazonian tree Pseudobombax munguba (Bombacaceae)

Cited by 6 publications

References 44 publications

Flowering phenology and pollination biology of Ceiba pentandra (Bombacaceae) in Central Amazonia

Flowering phenology and pollination biology of Ceiba pentandra (Bombacaceae) in Central Amazonia

Polymeric biocomposites of poly (butylene adipate-co-terephthalate) reinforced with natural Munguba fibers

Matrix polyester composite strengthened by munguba fiber (pseudobombax munguba) Amazon

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