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Journal : BIOEDUKASI

Leaf Morphological Response of Several Dendrobium Orchids due to Colchicine Application Windhiana Windhiana; Dwi Sucianingtyas Sukamto; Fatimatuz Zuhro
BIOEDUKASI Vol 21 No. 3 (2023)
Publisher : PROGRAM STUDI PENDIDIKAN BIOLOGI FAKULTAS KEGURUAN DAN ILMU PENDIDIKAN UNIVERSITAS JEMBER

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bioedu.v21i3.39770

Abstract

Dendrobium orchid is an ornamental plant that has a relatively stable market and does not depend on the season. The increasing public demand for Dendrobium orchids is an opportunity to improve the character and quality of Dendrobium orchids, one of which is by inducing mutations through the application of colchicine. This study aims to determine the effect of orchid varieties and colchicine application on the morphology of Dendrobium orchid leaves. This research was conducted at the Sriwijaya Orchid Gallery Cluster B9, Jember. This study used a 2 factorial Randomized Block Design (RBD). The first factor was the treatment of varieties consisting of Dendrobium Venus Purple Algis (ALG) and Dendrobium Transient Pink Frederika (FRD), the second factor was the treatment of colchicine concentrations (0 ppm or control, 4000 ppm, 5000 ppm and 6000 ppm). The results of this study indicated that the application of colchicine had a significant effect on several leaf morphological characters, namely leaf length, width, and color. The best leaf length was obtained at a concentration of 5000 ppm, the best leaf width was obtained at a control concentration of 0 ppm, and the most intense leaf color was obtained at a colchicine concentration of 6000 ppm.
The Implementation of the STAD Model Assisted by Teaching Aids to Improve Student Learning Outcomes on the Respiratory System in Grade VIII of SMP Kartika IV-6 Ambulu Zilfin Nabila; H. B. A Jayawardana; Dwi Sucianingtyas Sukamto
BIOEDUKASI: Jurnal Biologi dan Pembelajarannya Vol. 23 No. 3 (2025): Vol. 23, No. 3, October 2025
Publisher : PROGRAM STUDI PENDIDIKAN BIOLOGI FAKULTAS KEGURUAN DAN ILMU PENDIDIKAN UNIVERSITAS JEMBER

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bioedu.v23i3.53750

Abstract

This study aimed to improve the learning outcomes of Grade VIII students at SMP Kartika IV-6 Ambulu on the topic of the human respiratory system through the implementation of the Student Teams Achievement Division (STAD) cooperative learning model assisted by teaching aids. The study used the Classroom Action Research (CAR) method with the Kemmis and McTaggart design, conducted in two cycles consisting of planning, implementation, observation, and reflection. The subjects were 18 students, and data were collected using a validated multiple-choice test. The results showed an increase in the average score from 73.67 in Cycle I to 83.67 in Cycle II, while classical learning mastery improved from 66.67% to 100%. These findings indicate that the STAD model assisted by teaching aids is effective in improving students’ cognitive learning outcomes and active participation in science learning.