ABSTRAKTelah dilakukan penelititan dengan judul analisis aktivitas antioksidan terhadap beberapa tumbuhan Kalimantan Timur yang dianggap sebagai obat. Penelitian ini bertujuan untuk mengidentifikasi golongan metabolit sekunder yang terkandung dalam ekstrak dan menguji aktivitas antioksidan. Metode yang digunakan untuk mengidentifikasi golongan metabiolit sekunder dilakukan dengan penambahan reagen kimia sedangkan untuk menetahui aktivitas antioksidan dengan metode peredaman radikal bebas DPPH terhadap ekstrak dan fraksi menggunakan spektofotometer UV-Visible dengan panjang gelombang 517 nm. Hasil identifikasi golongan metabolit sekunder menunjukkan bahwa dari keempat jenis tumbuhan teridentifikasi mengandung golongan senyawa alkaloid, fenol, saponin, dan tanin serta aktivitas antioksidan dengan nilai IC 50 dari ekstrak kasar maupun fraksi terbaiknya dibawah 100 ppm. PENDAHULUANPergeseran pola hidup masyarakat dari pola hidup tradisional menjadi pola hidup yang praktis dan instan, khususnya pada pemilihan makanan yang dikonsumsi, memiliki dampak negatif bagi kesehatan. Makanan cepat saji dengan pemanasan tinggi dan pembakaran merupakan pilihan dominan yang dapat memicu terbentuknya senyawa radikal (Poumorad, 2006). Beberapa studi epidemiologi menunjukkan
AbstrakGen glyceraldehyde-3-phosphate dehydrogenase (GAPDH) merupakan salah satu gen referensi yang sering bertindak sebagai kontrol internal pada analisis ekspresi gen di beberapa spesies tumbuhan. Penelitian ini bertujuan menganalisis sekuen gen GAPDH parsial pada sirsak (Annona muricata L.). Metode meliputi persiapan sampel tanaman, isolasi DNA total menggunakan Genomic DNA mini kit Plant (Geneaid), amplifikasi gen GAPDH dengan teknik polymerase chain reaction (PCR), elektroforesis pada 1% gel agarose dan analisis data sekuen DNA. Studi ini telah memperoleh sekuen DNA dari gen GAPDH parsial sirsak sepanjang 961 pb. Sekuen tersebut memiliki kemiripan sekitar 68,93–84,35% dengan sekuen mRNA gen GAPDH pada beberapa spesies tumbuhan. Sekuen ini diprediksi terdiri dari 5 ekson dan 4 intron. Total ekson diprediksi terdiri dari 429 pb. Sekuen ini adalah yang pertama kali dilaporkan dari genus Annona dan juga dari famili Annonaceae. Sekuen ini dapat dimanfaatkan untuk analisis ekspresi gen pada sirsak dan dapat menjadi dasar untuk mengisolasi gen GAPDH spesies lain di dalam genus Annona dan famili Annonaceae. Abstract GAPDH (glyceraldehyde-3-phosphate dehydrogenase) gene is one of reference genes that is frequently became an internal control in any plant species. This study reports a DNA sequence of parsial GAPDH gene on soursop (Annona muricata L.). Methods included sample preparation, total DNA isolation using Genomic DNA mini kit Plant (Geneaid), amplification of GAPDH gene using PCR (polymerase chain reaction) technique, electrophoresis using 1% agarose gel and data analysis. This study had been obtained the DNA sequence of soursop partial GAPDH gene sizing 961 bp. The sequence had 68.93–84.35% similarity to GAPDH mRNA of some plants species. The soursop partial GAPDH gene was predicted consisting of 5 exons and 4 introns. The total exons length was 429 bp. The sequence is the first reported from Annona genus and also Annonaceae family. The sequence can be used for gene expression in soursop and also can be used to isolate GAPDH gene of other species in Annona genus and Annonaceae family.
Glyceraldehyde 3-phosphate dehydrogenase (GapC) is an enzyme involved in glycolysis. The expression of this gene tends to abundant in eukaryotic cells, so this gene is frequently used as an internal control in gene expression analysis. This research aims to isolate the DNA sequence of the GapC gene from tuntun angin (Elaeocarpus floribundus BI). Methods included a collection of the leaves from Kajuik Lake, Riau Province then the DNA extraction, electrophoresis, amplification of partial DNA sequence of GapC gene, cloning and sequencing. The DNA sequence was analyzed using the BLASTn program and MEGA6 software. The GapC sequence obtained in this study was 933 bp in size, consisting of four introns and five exons, and encoding 137 deduced amino acids. The BLASTn analysis showed that the sequence has 89.84%-90.16% similarity to other species of Cunoniaceae family, such as species from the genus of Spiraeanthemum and Codia. The parsial sequence of E. floribundus GapC gene was more resemble the one of Spiraeanthemum than Codia genus. The GapC sequence obtained in this study was the first reported from the Elaeocarpaceae family. This sequence has the opportunity to serve as an internal control after validation.
Determination of annealing temperature of the primer is the first step for genetic diversity analysis using molecular markers such as RAPD (Random Amplified Polymorphic DNA). This study aims to determine annealing temperature (Ta) of RAPD primers on Kampar Mungbean. Methods included total DNA extraction, electrophoresis, and annealing temperature optimization of four RAPD markers namely OPD-20, OPI-06, OPI-13, dan OPX-13. Optimization was conducted by reducing the Tm value (Time melting) of each primer with 3 (Tm-3) and 5 (Tm-5). The results showed that the optimization using OPD-20 and OPX-13 produced bands at Tm-3 and Tm-5. Meanwhile, optimization using OPI-06 and OPI-13 resulted in bands at Tm-3. The next step was to choose the exact Ta based on the clear and bright band. In conclusion, exact Ta for OPD-20, OPI-06, OPI-13, and OPX-13 were 36,1°C, 38,1°C, 35,4°C, and 32,5°C respectively.
Abstract. Roslim DI, Pratiwi TN, Herman. 2015. Agronomic characters and heritability of the third generation of Kampar mung bean lines (Vigna radiata). Nusantara Bioscience 7: 166-170. Kampar district is one of the mung bean producing areas in Riau Province, Indonesia. The low productivity of Kampar mung beans can be enhanced by doing plant selection in each generation to yield an expected superior line. The research aims to determine the agronomic character and heritability of third generation of Kampar mung bean lines. This research was conducted from October to December 2014 in the experimental garden of Biology, Faculty of Mathematics and Natural Sciences, University of Riau, Pekanbaru, Indonesia. It used nine lines of mung beans and five replicates with the Completely Randomized Design as design of experiments. Agronomic characters observed included plant height, number of productive branches, flowering time, 90% of harvesting time, number of pods per plant, weight of pods per plant, number of seeds per pod, seed weight per plant, weight of 100 seeds, pod color, and seed luster, Analysis of data uses analysis of variance (ANOVA) and if further significant differences are found, Duncan's Multiple Range Test (DMRT) will be carried out. The results showed significant difference for all the characters studied. All agronomic characters observed showed high heritability values, ranging from 0.92 to 0.98. G3 lines produce the highest number of pods per plant and highest number of seeds per pod and have small-sized seeds. G5 line has heaviest weight of pods per plant and heaviest weight of seeds per plant and they are in the criteria for medium-sized seeds. G1 lines' seeds are classified as large seeds which are more superior to seeds of other lines. Therefore, lines of G1, G3, and G5 have the potential to be continued in the next generation because it is likely to contain potential sources of genes to get the superior Kampar lines mung bean.
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