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Kota madiun,
Jawa timur
INDONESIA
Jurnal Florea
Published by Universitas PGRI Madiun
ISSN : 23556102     EISSN : 25020404     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology
Florea: Jurnal Biologi dan Pembelajarannya with registered number ISSN 2355-6102 (Print); ISSN 2502-0404 (Online) is scientific journals which publish articles from the fields of biology and biology education.
Arjuna Subject : -
Articles 265 Documents
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Leaf Morphology and Anatomy of Sonneratia alba Growing at Different Salinity Habitat in Pangandaran Coastal, West Java Haya, Rahma Fadia; Hasan, Rusdi; 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.
Growth Inhibition and Proline Accumulation in Canavalia ensiformis under Salinity Stress sri mulyaningsih; Sifa Arofah; Rifaatul Muthmainnah
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.v13i1.24384

Abstract

Jack bean (Canavalia ensiformis L.) is a legume with considerable potential as an alternative food source due to its high protein and carbohydrate content and its ability to improve soil fertility. However, its cultivation remains limited, particularly on marginal lands such as saline soils that are increasingly expanding due to seawater intrusion and improper irrigation. Soil salinity inhibits plant growth by causing osmotic and ionic stress while triggering proline accumulation as a physiological adaptation. This study aimed to evaluate the effects of salinity stress (NaCl) on the morphological growth and proline content of jack bean plants. The experiment was conducted in Singkup Village, Pasirwangi District, Garut, from April 26 to June 10, 2025, using a Completely Randomized Design (CRD) with five NaCl concentrations (0, 1500, 2500, 3500, and 5000 ppm) and five replications. Observed parameters included plant height, leaf number, root length, fresh weight, and proline content. Analysis of variance (ANOVA) showed that NaCl significantly affected all growth parameters. Growth inhibition was most pronounced at 5000 ppm, whereas optimal growth occurred at 0 ppm. Conversely, proline content increased with higher NaCl concentrations, indicating the plant’s adaptive response to salinity stress. Overall, jack bean growth declined significantly at NaCl levels above 2500 ppm, accompanied by increased proline accumulation. These findings provide insights for developing legume cultivation strategies on saline soils
Experiential Learning Model to Enhance Environmental Literacy Competence in High School Students Handziko, Rio Christy; Muhammad Cahya Nugraha
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.v13i1.24387

Abstract

The objectives of this research are to evaluate the potential of an Adiwiyata (Eco-school) public high school environment in Yogyakarta as a learning resource for biodiversity topics; to observe the ratio of teacher and student activities in the teaching and learning process using the experiential learning model; to examine the influence of the experiential learning model in facilitating students' learning styles; and to determine the improvement of students' environmental literacy competencies in the domains of knowledge, cognition, and communication within the biodiversity curriculum. This study was conducted with 10th-grade students using a purposive sampling technique involving both experimental and control classes. Data were collected through observations of learning resource potential, documentation, pretest-posttest, interviews, learning implementation records, teacher-student activity ratios, group communication assessments, and the distribution of environmental attitude questionnaires. Data were analyzed using an independent sample t-test via SPSS 30.0 for Windows. The results indicate that the high school environment possesses significant potential as a learning resource, the experiential learning model enhances student engagement, all student learning styles are effectively accommodated, and learning through direct interaction with biological study objects is proven effective in improving students' environmental literacy skills.
Arecaceae Diversity In Sambik Bangkol Village, North Lombok Regency, Indonesia Rahayu, Slamet Mardiyanto; Syuhriatin
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.v13i1.24390

Abstract

This research investigates the diversity of Arecaceae (palm) species in Sambik Bangkol Village, North Lombok Regency. The research was carried out using observation methods on the landscape of Sambik Bangkol Village. Species identification and individual counting were carried out. Then an analysis of the Shannon-Wiener species diversity index was carried out. A field survey in Sambik Bangkol Village identified fifteen distinct species, namely: Areca catechu, Arenga pinnata, Calamus manan, Caryota mitis, Cocos nucifera, Corypha utan, Cyrtostachys renda, Dypsis lutescens, Hyophorbe lagenicaulis, Licuala grandis, Phoenix dactylifera, Rhapis excelsa, Roystonea regia, Salacca zalacca, and Wodyetia bifurcata. Data analysis yielded a diversity index of 1.77, placing the area’s palm diversity in the moderate category. Moderate species diversity reflects the stability and resilience of the community, with each species playing an important role in maintaining overall ecosystem function. This allows the ecosystem to remain productive and able to adapt to small changes without experiencing significant disruption.
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.

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