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Rusdi Hasan
Universitas Padjadjaran
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Characteristics of Morpho-Anatomy, Chlorophyll, and Phytochemistry of Myrtaceae in the Pananjung Pangandaran Nature Reserve Anis Syarifa Romadhon; Asep Zainal Mutaqin; Rusdi Hasan
Florea : Jurnal Biologi dan Pembelajarannya Vol. 13 No. 2 (2026)
Publisher : UNIVERSITAS PGRI MADIUN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/florea.v13i2.24928

Abstract

The Pananjung Pangandaran Nature Reserve is an Indonesian conservation area rich in species of the Myrtaceae family. This study aims to analyze the morpho-anatomical characteristics, chlorophyll content, and phytochemical compounds of the leaves of several Myrtaceae species in the area using an exploratory approach with a mixed-methods design. The observed parameters include environmental abiotic factors, leaf morphology, stomatal anatomy, chlorophyll content, and phytochemical compounds. The data were analyzed descriptively and supported by a literature review. Five Syzygium species were successfully identified, namely S. densiflorum, S. aqueum, S. lineatum, S. antisepticum, and S. polyanthum. Elliptical leaf shapes and parasitic stomatal types were dominant. The highest stomatal density was found in S. antisepticum (326,115 stomata/mm²), while the highest chlorophyll content was in S. densiflorum (53,9 CCI). Saponins were detected in all species. Abiotic factors indicate variations in environmental conditions that influence the morpho-anatomical, chlorophyll, and phytochemical characteristics of Myrtaceae species in the region .
Morphological, Anatomical, and Phytochemical Responses of Celosia argentea to Light Intensity Carlen Fredella Josenia; Tia Setiawati; Marheny Lukitasari; Rusdi Hasan
Florea : Jurnal Biologi dan Pembelajarannya Vol. 12 No. 2 (2025)
Publisher : UNIVERSITAS PGRI MADIUN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/florea.v12i2.23218

Abstract

This study investigates the phytochemical content and morpho-anatomical characteristics of Celosia argentea L. plants grown under different light intensities in the Embung Leuwi Padjadjaran area. Leaf samples were collected from shaded and unshaded locations to compare their responses to varying light conditions. Phytochemical analysis revealed that plants in higher light intensity areas tended to have increased levels of specific phytochemical compounds, which is crucial for the plant's defense mechanisms. Furthermore, the research found morphological and anatomical differences, such as greater leaf thickness and a lower stomatal density in unshaded plants. Conversely, shaded plants exhibited higher chlorophyll content and larger leaf areas, which are adapted to low-light environments. The study concludes that varying light intensity significantly influences the morpho-anatomical features and phytochemical composition of Celosia argentea L., with shaded conditions promoting adaptations for light capture and unshaded conditions increasing certain phytochemicals and leaf thickness.
Biosystematics and Morphological Variation of Selected Syzygium Species (Myrtaceae) from Ternate Island, Indonesia Suparman; Fitria M Saleh; Zulkifli Ahmad; Marheny Lukitasari; Rusdi Hasan
Florea : Jurnal Biologi dan Pembelajarannya Vol. 13 No. 1 (2026)
Publisher : UNIVERSITAS PGRI MADIUN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/florea.v13i1.24396

Abstract

The genus Syzygium (Myrtaceae) is one of the most diverse groups of tropical woody plants, characterized by high morphological variation and complex taxonomy. This study aimed to investigate the biosystematics, spatial distribution, and phenetic relationships of Syzygium species on Ternate Island, Indonesia, using morphological and multivariate approaches. Field exploration was conducted across five districts, and morphological data were collected from both vegetative and reproductive organs. A total of eight species were recorded, exhibiting heterogeneous distribution patterns ranging from widespread to localized occurrences. Multivariate analyses, including hierarchical cluster analysis and Principal Component Analysis (PCA), revealed consistent phenetic relationships, separating the species into two major groups. The first two principal components accounted for 78.62% of the total variation, with fruit-related characters—particularly fruit size and flesh thickness—identified as the main determinants of species grouping. A dichotomous key based on diagnostic morphological traits was developed to facilitate accurate species identification. These findings highlight the importance of reproductive characters, especially fruit morphology, in species delimitation within Syzygium. This study provides a valuable baseline for taxonomy, biodiversity assessment, and conservation, and underscores the continued relevance of morphology-based biosystematics in tropical plant research.
Leaf Morphology and Anatomy of Sonneratia alba Growing at Different Salinity Habitat in Pangandaran Coastal, West Java Rahma Fadia Haya; Rusdi Hasan; Suparman
Florea : Jurnal Biologi dan Pembelajarannya Vol. 13 No. 1 (2026)
Publisher : UNIVERSITAS PGRI MADIUN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/florea.v13i1.24383

Abstract

Mangrove ecosystems are coastal ecosystems strongly influenced by salinity, which affects plant adaptation. Pangandaran Regency has mangrove areas with different salinity conditions that may influence the morphological and anatomical characteristics of Sonneratia alba Sm. This study aimed to analyze leaf area and thickness, stomatal characteristics, trichomes, chlorophyll content, and salt accumulation in Sonneratia alba leaves from Bulaksetra and Bojongsalawe. A qualitative and  quantitative approach was used through leaf morphological and anatomical analysis, as well as measurements of chlorophyll content and salt concentration. The results showed that leaf area and thickness did not differ significantly between locations. Stomatal density was significantly lower under high salinity (28.841 cells/mm²) compared to low salinity (40.765 cells/mm²) (p = 0.024), and chlorophyll content was also lower under high salinity (32.167 CCI) compared to low salinity (47.333 CCI) (p = 0.011). Unicellular non-glandular trichomes were found on the adaxial leaf surface of Sonneratia alba, helping reduce water loss and light exposure. Salt accumulation was higher under high salinity as an adaptive mechanism to maintain osmotic balance and reduce toxicity. Sonneratia alba shows ecophysiological plasticity in response to salinity through physiological and anatomical adjustments, especially in stomata and chlorophyll content. These findings highlight the importance of adaptive mechanisms Sonneratia alba for mangrove conservation and rehabilitation in coastal areas.
Co-Authors Anis Syarifa Romadhon Asep Zainal Mutaqin Carlen Fredella Josenia Fitria M Saleh Marheny Lukitasari Rahma Fadia Haya Suparman Suparman Tia Setiawati Zulkifli Ahmad