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18 results for “Acrocomia”
Herbarium specimen image of Acrocomia aculeata (Jacq.) Mart., part of the collection of Botanic Garden and Botanical Museum Berlin
Part of a training dataset of scanned herbarium specimens. The data paper and a summary landing page will be published on Zenodo as it gets published.<br><br>Content of this deposition:<br><br>- A JSON-LD datafile listing the label data associated with this herbarium specimen. The Darwin and Dublin Core data standards are used for most values.<br>- A JPEG image file of the scanned herbarium sheet.<br>- A lossless TIFF image from which the JPEG image has been derived.
Figura 1. Rhynchophorus palmarum. A in Detección y variación temporal de Rhynchophorus palmarum (Linnaeus) (Coleoptera: Dryophthoridae) en cultivos de Acrocomia aculeata (Jacq.) Lodd. ex Mart. en Itapúa, Paraguay
Figura 1. Rhynchophorus palmarum. A. Hembra adulta, habitus dorsal. Escala: 5 mm. B. Rostrum de la hembra, C. Rostrum del macho. Escalas: 1 mm.
Using a coalescent approach to assess gene flow and effective population size of Acrocomia aculeata (Jacq.) Lodd. Ex Mart. in the Brazilian Atlantic Forest
<p><i>Acrocomia aculeata</i> is a tropical palm tree native to Central and South America that has significant economic, social, and environmental potential. However, land encroachment due to the expansion of agribusiness, and other factors such as urban sprawl, have resulted in the fragmentation and destruction of its habitat, leading to the loss of genes and genotypes in <i>A. aculeata</i> populations. In this context, the objective of this study was to characterize the genetic variability of <i>A. aculeata</i> populations by estimating gene flow and effective population size using an approach based on coalescent theory. Four populations located in the municipalities of Teodoro Sampaio (TSI and TSII), Rosana (RA), and Amparo (AP) in São Paulo State, Brazil, were genotyped with nine microsatellite markers. Gene flow and effective population size were estimated using a coalescent-based Bayesian inference implemented in the MIGRATE-N software. The effective population size (<i>N<sub>e</sub></i>) was obtained considering an assumed mutation rate of <a name="_Hlk6565387">5x10<sup>-5</sup>. </a>Gene flow (<i>Nm</i>) for pairwise populations ranged from 0.28 to 1.17, with higher levels of migration between the three geographically proximal locations (TSI, TSII, and RA). The estimates of effective population size (<i>N<sub>e</sub></i>) were 444, 835, 838, and 874 for AP, TSII, RA, and TSI, respectively, showing that the effects caused by genetic drift may be more pronounced when <i>N<sub>e</sub></i> is smaller. The coalescent-based results add to our understanding of <i>A. aculeata</i> population genetics and suggest that some traditional assessment methods may be ineffective in characterizing historical evolutionary processes.</p>
Data from: Ensuring pollinator presence in expanding oil crops: The case of Mystrops debilis (Nitidulidae) and the macauba palm (Acrocomia aculeata, Arecaceae)
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Using a coalescent approach to assess gene flow and effective population size of Acrocomia aculeata (Jacq.) Lodd. Ex Mart. in the Brazilian Atlantic Forest
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Data from: Mating system and genetic composition of the macaw palm (Acrocomia aculeata): implications for breeding and genetic conservation programs
Acrocomia aculeata (Arecaceae), a palm endemic to South and Central America, is a potential oil crop. Knowledge of the mating system of this species is limited to its reproductive biology and to studies using molecular markers. The present study analyzed genetic diversity between its developmental stages and determined its prevailing mating system in order to support genetic conservation and breeding programs. We tested nine microsatellite markers in 27 mother trees (adult plants) and 157 offspring (juvenile plants) from the southeastern region of Brazil. Heterozygosity levels differed between the two studied life stages, as indicated by the fixation index of adult and juvenile trees, suggesting that selection against homozygotes occurs during the plant life cycle. The mating system parameters analyzed indicate that A. aculeata is predominantly outcrossing (allogamous). However, its low levels of selfing suggest that there is individual variation with regard to self-incompatibility, which can be a survival strategy in isolated or fragmented habitats. Deviations in variance effective size were detected because of high mating rates among relatives and correlated matings. These findings indicate that the main source of inbreeding results from biparental inbreeding in the population and that the progenies are predominantly composed of full-sibs. The information provided by this study on the ecology and reproduction dynamics of A. aculeata should be useful to both breeding and genetic conservation programs, allowing the development of more precise mathematical models and the estimation of the appropriate number of mother trees for seed collection.
Unveiling the Role of Acrocomia aculeata Palms in Savanna Hydrology: Insights from Bark Morphology and Stemflow Dynamics
<p>In this study, we investigated stemflow in <em>Acrocomia aculeata</em> trees in an Amapá savanna, in an Amapá savanna, focusing on the influence of structural traits on stemflow volumes. Diameter at breast height, crown area and height of trees were determined. Bark hydrophobicity and texture were also investigated. During the sampling period, total precipitation was 1,744.3 mm, with stemflow accounting for 0.71% of this total. This value is lower than previously reported, highlighting the variability of stemflow across different environments and study conditions. We found significant diversity in stemflow volumes among the studied individuals, which were categorized into three classes: high (more than 0.18mm), medium (between 0.10-0.18mm) and low (less than 0.10mm). . Our analysis revealed a strong correlation between bark contact angle and stemflow volumes, indicating that surfaces with higher hydrophobicity favor greater water flow to the soil. This emphasizes the relevance of bark physical properties in regulating stemflow. Principal component analysis indicated that the combination of stemflow and bark contact angle, along with characteristics such as crown geometry and height, explains most of the variability in stemflow volumes. However, other morphological characteristics such as diameter at breast height and projected crown area showed no significant correlation with stemflow, suggesting bark morphology might play a more determining role in stemflow than initially thought. Significant structural differences in bark surfaces were observed through scanning electron microscopy and optical microscopy, indicating that bark texture, including the presence or absence of grooves and furrows, influences stemflow capacity. This study enhances our understanding of the complex interactions between palm tree morphological and dendrometric characteristics and stemflow, highlighting the importance of considering bark hydrophobicity and structural properties in forest hydrology studies. The results suggest the need to explore bark characteristics beyond its morphology to understand stemflow dynamics in savanna ecosystems.</p>
Fig. 3 in A review of the palm genus Acrocomia: Neotropical green gold
Fig. 3 An overview of Acrocomia species. A. aculeata: stem aspects with persistent leaf base remnants; A. intumescens: enlarged stem without persistent leaf bases; A. totai: smooth stem without persistent leaf bases
Fig. 2 in A review of the palm genus Acrocomia: Neotropical green gold
Fig. 2 Fossil record occurrence summarized from literature for Acrocomia with their ages BP. Hypothesis (a) dispersion of Acrocomia species by Mayans had started in Mexico toward Central America (Lentz 1990). (b) South America dispersion of fruits toward Central America (Morcote-Rios and Bernal 2001). The date highlighted in the rectangle refers to the oldest known record. References: 9530+/−100 (Gneeco and Mora 1997); 8040+/−390 (Cooke 1992); 7000–4500 (Cooke and Ranere 1992); 6750–2450 (Ranere 1980; Smith 1980); 6750 (Lentz 1990; Smith 1965); 4210+/−90; 2960+/−180 (Cooke and Ranere 1992); 3150 (Vega
Fig. 1 in A review of the palm genus Acrocomia: Neotropical green gold
Fig. 1 Distribution of occurrence records of Acrocomia species from Central America to southern South America throughout the Neotropical region. STDF seasonally tropical dry forest. Image sources: A. crispa
FIGURE 5 in A new species of Acrocomia (Arecaceae) from Central Brazil
FIGURE 5. Graphic representation of the distribution of structures and tissues: Aa Acrocomia aculeata, Ac A. crispa, Ae A. emensis, Ag A. glaucescens, Ah A. hassleri, Ai A. intumescens, At A. totai, Aco A. corumbaensis.
FIGURE 1. Acrocomia corumbaensis. A. Habit. B. Leaf. C. Leaf rachis. D. Rachilla. E. Pistillate flowers. F in A new species of Acrocomia (Arecaceae) from Central Brazil
FIGURE 1. Acrocomia corumbaensis. A. Habit. B. Leaf. C. Leaf rachis. D. Rachilla. E. Pistillate flowers. F. Longitudinal section of pistillate flower. G. Staminate flowers. H. Staminate flower closed. I. Staminate flower open. J. Cross section of the anther. K. Pistillode. L. Staminate flower floral diagram. M. Pistillate flower floral diagram. N. Infrutescence. O. Young fruit with many trichomes. P. Mature fruit. Q. Cross section of the mature fruit. R. Endocarp.
FIGURE 2. Acrocomia corumbaensis. A. Habit. B. Young light yellow inflorescence. C. Mature light green inflorescence. D. Infrutescence with young fruits. E in A new species of Acrocomia (Arecaceae) from Central Brazil
FIGURE 2. Acrocomia corumbaensis. A. Habit. B. Young light yellow inflorescence. C. Mature light green inflorescence. D. Infrutescence with young fruits. E. Mature fruits.
FIGURE 3 in A new species of Acrocomia (Arecaceae) from Central Brazil
FIGURE 3. Leaflet blade cross section of Acrocomia corumbaensis: ep epidermis, hy hypodermis, nvfb non-vascular fiber bundles, st stomata, pvb principal vascular bundle, sf sclerenchymatic fiber, svb secondary vascular bundle and idb idioblast. Bar 200 μm.
FIGURE 4 in A new species of Acrocomia (Arecaceae) from Central Brazil
FIGURE 4. Scanning electron micrograph of leaflet blades in Acrocomia corumbaensis: A. Non-vascular fiber bundles with stegmata. B. Detail of stegmatas. C. Detail of a silica body with a spiculate surface. D. Epicuticular patterns of wax deposition on the adaxial surface. E. Epicuticular patterns of wax deposition on the abaxial surface. F. Midrib. Bar 10 μm (A, B, D, E); 1 μm (C); 200 μm (F).
Data from: Mating system and genetic composition of the macaw palm (Acrocomia aculeata): implications for breeding and genetic conservation programs
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Data from: Molecular characterization and population structure of the macaw palm, Acrocomia aculeata (Arecaceae), ex situ germplasm collection using microsatellites markers
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Figura 2-3. 2A in Detección y variación temporal de Rhynchophorus palmarum (Linnaeus) (Coleoptera: Dryophthoridae) en cultivos de Acrocomia aculeata (Jacq.) Lodd. ex Mart. en Itapúa, Paraguay
Figura 2-3. 2A. Número total de individuos de R. palmarum, precipitación acumulada, temperatura media, máxima y mÍnima y humedad relativa en Hohenau, Itapúa, Paraguay. 2B. Número total de individuos de R. palmarum, precipitación acumulada, temperatura media, máxima y mÍnima y humedad relativa en Bella Vista, Itapúa, Paraguay. 3. Número promedio total de individuos, hembras y machos de los lotes de Hohenau y Bella Vista, Itapúa, Paraguay.
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