Reproductive systems of Hohenbergia Schult. & Schult.f. (Bromelioideae: Bromeliaceae) endemic to the Atlantic Forest
Data files
May 12, 2025 version files 104.50 KB
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2022_2023_Reproductive_systems_of_Hohenbergia_Evaluation_of_pollen_grain_germination_and_pollen_tube_growth_within_the_pistil.txt
15.26 KB
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2022_2023_Reproductive_systems_of_Hohenbergia_Fruits_with_Seeds.txt
38.91 KB
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2022_2023_Reproductive_systems_of_Hohenbergia_Number_of_Ovules.txt
921 B
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2022_2023_Reproductive_systems_of_Hohenbergia_Number_of_Pollen_Grains.txt
7.30 KB
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2022_2023_Reproductive_systems_of_Hohenbergia_Seeds_per_Fruit.txt
37.56 KB
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README.md
4.54 KB
Abstract
The intense fragmentation and anthropogenic pressure affecting the Atlantic Forest highlight the need for species conservation, particularly those in the genus Hohenbergia. The H. stellata complex includes endemic species that rely on diverse reproductive strategies, which are essential for their maintenance and diversification. Research on the reproductive systems of these species is crucial for understanding their adaptability and ensuring their preservation. This study aimed to investigate the reproductive systems of species within the Hohenbergia stellata complex, analyzing the potential occurrence of reproductive barriers and their reliance on cross-pollination. The pollen-to-ovule ratio was assessed, along with various methods for evaluating reproductive systems in H. amargosensis, H. belemii, H. capitata, H. ituberaensis, H. nidularioides, H. rosea, and H. stellata. Hohenbergia capitata and H. nidularioides are partially self-compatible species, while the others are self-incompatible. All of them reproduce through cross-pollination, with a greater number of seeds produced by natural pollination. The data obtained on the reproductive aspects of Hohenbergia species are important to support studies aimed at the improvement and conservation of these species.
Dryad DOI: https://doi.org/10.5061/dryad.9p8cz8wvd
This dataset provides detailed information about the reproductive systems of Hohenbergia, a genus belonging to the family Bromeliaceae. Data were collected between 2022 and 2023 and include assessments of pollen grain germination, pollen tube growth, fruit production, number of seeds per fruit, number of ovules per flower, and number of pollen grains produced per flower. The dataset aims to provide insights into the reproductive biology of the species, contributing to studies in ecology, evolution, and conservation.
Data Description and File Structure
The data are organized into five files:
2022_2023_Reproductive_systems_of_Hohenbergia_Evaluation_of_pollen_grain_germination_and_pollen_tube_growth_within_the_pistil.txt:
Contains data on pollen grain germination and pollen tube growth in Hohenbergia flowers.
The data are organized in a tabular format and include columns with species name, treatment, number of replicates, and qualitative values for each variable studied.
Species: Plant species.
Pollination_type: Type of pollination (e.g., Natural, Spontaneous, Artificial).
Replicate: Experimental replicate number.
Abbreviations: PGSS = pollen grains adhering to the surface of the stigma; PGGS = pollen grains germinating on the surface of the stigma were evalu ated according to the scale: 0) none; 1) 1–25 pollen grains; 2) 26–50 pollen grains; 3) more than 50 pollen grains. PTGP = pollen tube growth on the pistil was evaluated according to the scale: 0) pollen grains not germinating on the surface of the stigma; 1) pollen grains germinating on the surface of the stigma; 2) pollen tubes arrested in the first third of the style; 3) pollen tubes arrested in the second third of the style; 4) pollen tubes arrested in the final third of the style; 5) pollen tubes in the region of the ovary; 6) pollen tube close to the ovule; 7) pollen tube penetrating the micropyle. OPTM = ovules penetrated by a pollen tube into their micropyle: 0) none; 1) 1–5 ovules; 2) 5–10 ovules; 3) > 10 ovules.
2022_2023_Reproductive_systems_of_Hohenbergia_Fruits_with_Seeds.txt:
Records the number of fruits formed with seeds. Data are organized in a tabular format with columns:
Species: Plant species.
Treatment: Pollination treatment (e.g., Natural, Spontaneous, Artificial).
Replicate: Experimental replicate number.
Fruit_with_seed: Presence of seeds in the fruit (0 = no seeds, 1 = seeds present).
2022_2023_Reproductive_systems_of_Hohenbergia_Number_of_Ovules.txt:
Provides the number of ovules per flower. Data are organized in a tabular format with columns:
Species: Plant species.
Replicate: Experimental replicate number.
Ovule Count: Count of ovules per flower (units: count).
2022_2023_Reproductive_systems_of_Hohenbergia_Number_of_Pollen_Grains.txt:
Lists the number of pollen grains produced per flower. Data are organized in a tabular format with columns:
Species: Plant species.
Replicate: Experimental replicate number.
Field: Counting field in a Neubauer chamber.
Quadrant: Subdivision of the counting field.
Pollen Grain Count: Count of pollen grains per quadrant (units: count).
2022_2023_Reproductive_systems_of_Hohenbergia_Seeds_per_Fruit.txt:
Presents the number of seeds per fruit. Data are organized in a tabular format with columns:
Species: Plant species.
Treatment: Pollination treatment (e.g., Natural, Spontaneous, Artificial).
Replicate: Experimental replicate number.
Seeds_per_fruit: Count of seeds per fruit (units: count).
Definition of Variables:
Species Name: Identifies the plant species used in the experiment.
Treatment: Refers to the experimental conditions applied to the samples.
Number of Replicates: The number of samples or experimental units subjected to the same treatment. This value allows for statistical analysis and the assessment of data variability.
Field: Refers to the counting field in the Neubauer chamber, a defined area containing a specific quantity of cells or particles in suspension. Each field is numbered or identified to standardize the counts.
Quadrant: Subdivision within the field of the Neubauer chamber. The chamber is composed of several quadrants, each with defined areas for particle counting. This subdivision allows for more precise counting and the calculation of representative averages.
Data Sharing/Access
NA