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All Journal Biocaster : Jurnal Kajian Biologi
Herliani Herliani
Program Studi Pendidikan Biologi, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Mulawarman, Jalan Muara Pahu, Samarinda, Kalimantan Timur 75242, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Immunology & microbiology

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Pengaruh Faktor Intensitas Cahaya terhadap Jumlah dan Ukuran Stomata Daun Tumbuhan Monokotil di Arboretum Sempaja (Penunjang Materi Jaringan Tumbuhan) Annisa Annisa; Herliani Herliani; Zenia Lutfi Kurniawati; Nelda Anasthasia Serena
Biocaster : Jurnal Kajian Biologi Vol. 5 No. 4 (2025): October
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/biocaster.v5i4.668

Abstract

The effect of light on stomata has been extensively studied, but studies that specifically observed the effect of light intensity on the size and number of stomata in monocot plants at the Sempaja Arboretum, Samarinda, are still very limited, including monocot plants, and have the potential to be a contextual learning resource for biology education in schools. The purpose of this study is to determine the effect of light intensity on the number and size of stomata in monocot plants in the Sempaja Arboretum. This research was carried out from February to May. This study used a Non-Factorial Group Random Design, with 3 different light intensities (morning, noon, and evening). Based on the results of statistical tests (ANOVA and Duncan's follow-up tests), not all species show statistically significant differences in size and number between times (morning, noon, evening). Some species such as Sri Rejeki (Aglonema sp) and Turmeric (Curcuma longa) show statistically insignificant changes. In other species such as Virginia Flower (Commelina virginica), Palm (Arenga pinnata), and Golden Ivory Betel (Epipremnum aureum), the difference in stomata size between times is more pronounced and significant.
Pengaruh Penerapan Model Team Games Tournament pada Materi Keanekaragaman Hayati Berbasis Games QuizWhizzer terhadap Motivasi dan Hasil Belajar pada Siswa/i Kelas VII Octaviani Sari; Dora Dayu Rahma Turista; Elsje Theodora Maasawet; Masitah Masitah; Herliani Herliani; Vandalita Maria Magdalena Rambitan
Biocaster : Jurnal Kajian Biologi Vol. 5 No. 4 (2025): October
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/biocaster.v5i4.720

Abstract

This study aims to determine the effect of the application of the Team Games Tournament (TGT) model on biodiversity materials based on QuizWhizzer game media on the motivation and learning outcomes of grade VII students of SMP Negeri 7 Samarinda. The research method used was a quasi-experimental with a pretest-posttest control group design. The research subjects consisted of 25 students in grades VII-D as an experimental class using the QuizWhizzer-based TGT model, and 25 students in class VII-F as a control class using the discovery learning model. The results of the study showed that there was a significant influence of the application of the QuizWhizzer-based TGT model on student motivation and learning outcomes. Based on the results of the t-test, a significance value (2-tailed) of 0.001 < 0.05 was obtained which showed a significant influence on learning outcomes. The results of the N-Gain test showed an increase in learning outcomes in the medium category, with an average increase in the experimental class of 0.43, while the control class was 0.35. In addition, the results of the Mann-Whitney test on learning motivation showed a p-value of 0.000 < 0.05 which means that there is a significant difference between the two classes. Thus, it can be concluded that the use of the Team Games Tournament (TGT) model based on QuizWhizzer media has a significant effect on increasing student motivation and learning outcomes. This model has also been proven to increase students' interest in the learning process through fun game elements.
Analisis Kerapatan dan Ukuran Stomata Tumbuhan Dikotil pada Area Naungan dan Terbuka di Arboretum Sempaja (sebagai Bahan Ajar Materi Jaringan Tumbuhan Kelas XI SMA) Nuryani Nuryani; Herliani Herliani; Sri Purwati; Akhmad Akhmad
Biocaster : Jurnal Kajian Biologi Vol. 5 No. 4 (2025): October
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/biocaster.v5i4.769

Abstract

Shading causes differences in light intensity that trigger physiological and morphological variations in leaves, including stomata density and size as a form of adaptation to balance photosynthesis and transpiration. This phenomenon is the basis for selecting the research, because it illustrates the adaptive ability of plants to changes in the microenvironment in their natural habitat. This study aims to analyze the density and size of stomata of dicotyledonous plants growing in shaded and open areas in the Sempaja Arboretum. This study uses a descriptive quantitative approach with samples of several dicotyledonous plant species growing in shaded and open areas. Data were obtained through microscopic observation of leaf epidermis preparations using direct section techniques, optilab, and image raster 3. Statistical analysis showed that the density of stomata in open areas was higher (480 stomata/mm²) than in shaded areas (323 stomata/mm²). However, the size of the stomata did not show a consistent pattern; The average length (25.21 µm) and width (18.45 µm) of stomata in the shaded area were slightly larger than those in the open area (24.16 µm and 17.18 µm). These results indicate that high light intensity encourages increased stomatal density as an adaptive mechanism to support photosynthesis.
Co-Authors Akhmad Akhmad Annisa Annisa Dora Dayu Rahma Turista Elsje Theodora Maasawet Masitah Masitah Nelda Anasthasia Serena Nuryani Nuryani Octaviani Sari Sri Purwati Vandalita Maria Magdalena Rambitan Zenia Lutfi Kurniawati