Pinaceae
Morphological and secretory characterization of extrafloral nectaries in plants of coastal Veracruz, Mexico. (1/6)
BACKGROUND AND AIMS: Morphological descriptions of the extrafloral nectaries (EFNs) of certain plant species are common in the literature, but they rarely relate morphology with histology, gland distribution and secretory attributes. In this study a morphological/secretory characterization of EFNs occurring on several plant species in a tropical coastal community is made and the implications of gland attributes discussed from a functional perspective. METHODS: The morphology and nectar secretion of the EFNs of 20 plant species are characterized through scanning electron microscopy, histochemical detection of reducing sugars (Fehling's reagent) and nectar volume/concentration estimates. KEY RESULTS: Sixty-five per cent of plant species in coastal communities had EFNs on vegetative structures and 35 % of species had glands on reproductive and vegetative organs. The Fabaceae is the plant family with the most species with EFNs and most diversity of gland morphologies. Four types of vascularized nectaries and four of glandular trichomes are described; sugar-secreting trichomes are characterized using Fehling's technique, and the first descriptions of unicellular and peltate trichomes functioning as EFNs are provided. Glands of ten plant species and six genera are described for the first time. Four plant species possess more than one morphological type of EFN. Eleven species have EFNs in more than one location or organ. More complex glands secrete more nectar, but are functionally homologous to the aggregations of numerous secretory trichomes on specific and valuable plant organs. CONCLUSION: Important diversity of EFN morphology was foundin the coastal plant community studied. Both vascularized and non-vascularized EFNs are observed in plants and, for the latter, previously non-existent morpho-secretory characterizations are provided with a methodological approach to study them. It is recommended that studies relating EFN attributes (i.e. morphology, distribution) with their differential visitation by insects (i.e. ants) and the cost of maintenance to the plants are carried out to understand the evolution of these glands. (+info)Apotirucallane and tirucallane triterpenoids from Cedrela sinensis. (2/6)
Nine new triterpenoids, 1-9, were isolated from the cortex of Cedrela sinensis (Meliaceae), together with six known compounds, sapelin E acetate, grandifoliolenone, azadirone, bourjotinolone A, piscidinol A, and hispidol B. The structures of 1-9 were determined by the 2D NMR experiments, chemical methods, and X-ray crystallography. (+info)Floral development in the tribe Cedreleae (Meliaceae, sub-family Swietenioideae): Cedrela and Toona. (3/6)
BACKGROUND AND AIMS: Floral development of Cedrela and Toona, the genera comprising the basal tribe Cedreleae of the sub-family Swietenioideae of Meliaceae, is described. The focus was on three endangered, ecologically and economically important species: Cedrela fissilis, Cedrela odorata and Toona ciliata. The aims of the study were to characterize the patterns of floral development in the tribe and to establish apomorphic and plesiomorphic floral characters in relation to other taxa within the family based on the current molecular phylogeny of Meliaceae. METHODS: A detailed floral structural and developmental study was completed using both scanning electron microscopy and visualization of microtome sections with a light microscope. KEY RESULTS: Twelve floral developmental stages were identified. The initial development of the pentamerous flowers of both Toona and Cedrela is strikingly similar. The morphological differences observed between them are due to differential patterns of organ elongation and adnation/connation occurring late in development. Additionally, the formation of functionally male and female flowers was found to occur at specific positions within the inflorescence. CONCLUSIONS: Due to the basal position of the tribe Cedreleae in the phylogeny of Meliaceae, functionally either male or female pentamerous flowers and the presence of (at least partially) free stamens may be considered plesiomorphic traits within the family. In contrast, sympetaly and the absence of nectaries in Cedrela species are synapomorphies. (+info)Molecular evidence of cryptic speciation, historical range expansion, and recent intraspecific hybridization in the Neotropical seasonal forest tree Cedrela fissilis (Meliaceae). (4/6)
(+info)Oxygen isotopes in tree rings are a good proxy for Amazon precipitation and El Nino-Southern Oscillation variability. (5/6)
(+info)New limonoids and a dihydrobenzofuran norlignan from the roots of Toona sinensis. (6/6)
(+info)Cedrela is a genus of trees in the mahogany family (Meliaceae) that are native to tropical and subtropical regions of the Americas. In the medical field, Cedrela species are not commonly used for medicinal purposes. However, some species of Cedrela have been used in traditional medicine to treat a variety of conditions, including fever, inflammation, and pain. Some species of Cedrela are also used in the production of wood, which is valued for its durability and attractive appearance.
In the medical field, "DNA, Concatenated" refers to the process of joining together two or more DNA sequences to create a single, longer DNA molecule. This process is often used in genetic engineering and molecular biology to create recombinant DNA molecules that can be used for various purposes, such as creating genetically modified organisms or studying gene function. Concatenation of DNA sequences can be achieved through various methods, including ligase-mediated joining, restriction enzyme-mediated joining, and homologous recombination. The resulting concatenated DNA molecule can be further manipulated and analyzed using various molecular biology techniques, such as PCR, sequencing, and cloning. Overall, the concatenation of DNA sequences is a fundamental technique in molecular biology and has numerous applications in the medical field, including the development of new drugs, gene therapies, and diagnostic tests.
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Odorata8
- Daza Cedrela odorata L. - West Indies and from 24° N in Mexico south to 28° S in Argentina Cedrela oaxacensis C.DC. (wikipedia.org)
- Cedrela odorata is a very important timber tree, producing a lightweight fragrant wood with very good resistance to termites and other wood-boring insects, and also rot-resistant outdoors. (wikipedia.org)
- Some species are now CITES-listed, in particular Cedrela odorata. (wikipedia.org)
- By comparing growth rings in Cedrela odorata trees found in the Rio Paru watershed of the eastern Amazon River with hundreds of similar chronologies in North and South America, scientists have shown an inverse relationship in tree growth, and therefore precipitation patterns, between the areas. (eurasiareview.com)
- Cedrela odorata or cedar wood is used in medicine particularly in the treatment of fever, sores, headaches,earache, and wounds. (ac.rw)
- The six trees in the experiment, Anacardium excelsum (Espave in Spanish), Cedrela odorata , Dalbergia retusa (Cocobolo), Pachira quinata (Cedro Espino), Tabebuia rosea (Roble) and a (Amarillo), all have high timber value and are commonly used for reforestation in Panama. (phys.org)
- Cedrela odorata (Meliaceae) is considered as one of the most valuable forest tree in the tropics. (bvsalud.org)
- The sequence of anatomical changes that takes place during the formation of adventitious roots in shoots of Cedrela odorata cultured in vitro is described in this study. (bvsalud.org)
Meliaceae3
- Cedrela is a genus of several species in the mahogany family, Meliaceae. (wikipedia.org)
- A Monograph of Cedrela (Meliaceae). (wikipedia.org)
- The goal of this project is to protect a newly discovered, Critically Endangered tree species, Cedrela angusticarpa (Meliaceae), and its associated threatened tree species in the Mache Chindul Cordillera, an internationally recognized but poorly known biodiversity hotspot of Chocó in north-west Ecuador. (fondationfranklinia.org)
Moritz ex Turcz1
- Cedrela montana Moritz ex Turcz - Colombia & Ecuador Cedrela nebulosa T.D. Penn. (wikipedia.org)
Fissilis2
- Vegetative rescue of Cedrela fissilis Vell. (bvsalud.org)
- by the rooting of cuttings from epicormic and canopy sprouts / Resgate vegetativo de Cedrela fissilis Vell. (bvsalud.org)
Ecuador1
- New species proposals include two from Malawi-to include Pterocarpus tinctorius and Widdringtonia whytei in Appendix II-and one from Ecuador to list the tropical Cedrela timber species: in 2007, the EU withdrew its proposal for Cedrela listings following strong opposition from a number of countries including Latin American range states. (traffic.org)
Species2
- On 28 October 2022 all Neo-tropic Cedrela species were added to CITES Appendix II. (wikipedia.org)
- These species are currently accepted: Cedrela angustifolia Sessé & Moc. (wikipedia.org)
Costa Rica1
- Costa Rica south to Argentina Cedrela kuelapensis T.D. Penn. (wikipedia.org)
Tabebuia1
- For the first time in tropical mountain rain forest, arbuscular mycorrhizal fungal richness and community composition was investigated from planted seedlings of Cedrela montana, Heliocarpus americanus, Juglans neotropica and Tabebuia chrysantha in reforestation plots on degraded pastures. (ufz.de)
Argentina1
- The connection was not documented until researchers at the University of Arkansas Tree Ring Laboratory, along with colleagues from Brazil and Argentina, developed rainfall reconstructions from growth rings in Cedrela trees. (eurasiareview.com)
Colombia1
- In 1542, Philipp von Hutten traveled from Coro over this area en route towards Colombia. (wikipedia.org)
Tree1
- The new Cedrela chronologies from the Amazon, when compared with the hundreds of tree-ring chronologies in temperate North and South America, document this Pan American resonance of climate and ecosystem extremes in the centuries before widespread deforestation or human-caused climate change," said Dave Stahle, Distinguished Professor of geosciences and first author of a study documenting the findings in the journal Environmental Research Letters . (eurasiareview.com)
Trees1
- The long climate history written in the growth rings of old Cedrela trees in Amazonia will surely be important to the sustainability of the biome. (eurasiareview.com)
Deciduous1
- The Spanish cedar, on the other hand, comes from the Cedrela species, deciduous trees with pinnate leaves. (villigercigars.com)
Ceder1
- Mountain Spanish Ceder (Cedrela montana) in its natural habitat. (thenatureofcities.com)