Morfologi Daun Durian (Durio zibethinus L.) dan Keanekaragaman Genetiknya Berdasarkan Marka ISSR

 AbstrakData keanekaragaman durian (Durio zibethinus L.) yang terbatas merupakan salah satu kendala yang dihadapi dalam pengelolaan dan pengembangannya di Indonesia. Keanekaragaman genetik dapat ditinjau berdasarkan ciri morfologi yang didukung dengan ciri molekuler. Tujuan penelitian ini adalah untuk mengetahui kekerabatan antar aksesi berdasarkan dendrogram yang menggabungkan data morfologi daun dan polimorfisme Inter Simple Sequence Repeats (ISSR). Pengamatan ciri morfologi mengacu pada deskriptor durian dan ektraksi DNA dengan metode CTAB yang telah dimodifikasi. Setelah berhasil diekstraksi, DNA durian diamplifikasi dengan tujuh primer ISSR untuk analisis polimorfisme. Konstruksi dendrogram yang terbentuk merupakan hasil analisis menggunakan program NTSYS. Berdasarkan 15 ciri morfologi yang diamati terdapat 5 ciri yang sangat membedakan antara kelompok aksesi durian. Lai (D. kutejensis) memiliki daun lebih panjang hingga 24 cm dan lebar hingga 16 cm dibandingkan 28 aksesi durian dengan panjang hingga 16 cm dan lebar hingga 9 cm. Hasil amplifikasi diperoleh sebanyak 35 pita dan 31 pita bersifat polimorfik dengan persentase polimorfisme berkisar antara 66,7–100%. Persentase polimorfisme pada penelitian ini dapat mencapai 100% dengan primer ISSR 842, PKBT 4, dan PKBT 5. Konstruksi dendrogram ciri morfologi mempunyai koefisien kemiripan sebesar 0,56–0,91 dan membentuk dua kelompok yang tidak memisahkan aksesi-aksesi durian dengan Lai. Ciri polimorfisme ISSR dapat digunakan untuk merekonstruksi dendrogram menjadi dua kelompok dengan koefisien kemiripan sebesar 0,48–0,96. Dendrogram ciri polimorfisme ISSR secara tegas memisahkan aksesi-aksesi durian dengan Lai. Pohon kekerabatan 28 aksesi durian dan Lai di Kecamatan Serpong telah direkonstruksi untuk pertama kalinya.AbstractLimited data on the diversity of durian (Durio zibethinus L.) is one of the obstacles encountered in its management and development in Indonesia. Genetic diversity can be reviewed based on morphological characteristics supported by molecular characteristics. This study aimed to determine the relationship between accessions based on a dendrogram that combines leaf morphology and Inter Simple Sequence Repeats (ISSR) polymorphism data. Observation of morphological features refered to durian descriptors and DNA extraction using the modified CTAB method. After successful extraction, durian DNA was amplified with seven ISSR primers for polymorphism analysis. The dendrogram construction is formed the NTSYS program. Based on the 15 morphological characteristics observed, 5 characteristics greatly distinguished the durian accession group. Lai (D. kutejensis) had longer up to 24 cm and wider up to 16 cm leaves than 28 durian accessions with a length (16 cm) and width (9 cm). The amplification results were obtained 35 bands and 31 out of them were polymorphic with polymorphic PCR product ranged 66.7–100%. The percentage of polymorphism could reach 100% with ISSR 842, PKBT 4, and PKBT 5 primers. The dendrogram construction based on morphological characteristics had an interaction coefficient of 0.56–0.91 and formed two groups which did not separate durian accessions with Lai. The ISSR polymorphism feature can be used to reconstruct the dendrogram into two groups with a slope coefficient of 0.48–0.96. The dendrogram based on the ISSR polymorphism feature explicitly divides durian accessions with Lai. The cluster analysis of 28 durians and Lai accessions in Serpong District has been reconstructed for the first time

Propagation of Cardamom (Amomum compactum) Using Vitamin B1, Indole Butyric Acid and Their Combinations Ex Vitro

Cardamom (Amomum compactum) is an aromatic spice plant with numerous benefits, widely used in cooking, medicine, and beverages. The high demand for cardamom remains unmet due to the lengthy germination period required for cardamom seeds and the inability of cardamom shoots to thrive when planted independently from the mother plant. The presence of the mother plant significantly impacts cardamom nurseries utilizing shoots, making it challenging to obtain large quantities of nursery transplants. Growth stimulants, such as vitamin B1 and Indole Butyric Acid (IBA), are required to en­hance vegetative growth in plants. Vitamin B1 (IPI brand) is applied due to its ease of accessibility and cost-effectiveness. Meanwhile, IBA is utilized for its accessibility, stable chemical content, and prolonged efficacy. This research aims to determine the optimal concentration of vitamin B1, IBA, and their combination to enhance the growth of mother and tiller shoots of cardamom ex vitro. The research employed a two-factorial Randomized Complete Block Design, with vitamin B1 concentrations of 21.5% and 43% and IBA concentrations of 0.75 ppm and 150 ppm. The treatment V1I1 (vitamin B1 21.5% and IBA 75 ppm) on mother plant shoots maintained a survival rate of 67% up to 12 Weeks After Planting (WAP). The interaction between vitamins B1 and IBA exhibited no significant effect on all parameters of mother shoots and tillers; however, vitamin B1 significantly influenced the vegetative growth of cardamom mother shoots. Vitamin B1 at 43% produced a significantly higher number of leaves compared to 21.5%. Thus, vitamin B1 at 43% is recommended for cardamom propagation, while vitamin B1 at 21.5% has the potential to enhance the average growth of tiller shoots across all parameters

Angsana (Pterocarpus indicus) sebagai Bioindikator untuk Polusi di Sekitar Terminal Lebak Bulus

Jakarta as one of the biggest city in Indonesia, it own more than 6.506.244 units of motor vehicles. The combustion of fossil fuels in motor vehicles can cause air pollution. Station is represented as one of heavy pollution location. The observation has be done by abservate the amount of vehicles, stomatal characteristic, and weight of dust on Angsana leaves, which growth around Lebak Bulus station. As the result, there is relation between weight of dust on leaf and stomatal characteristic, with r value = 1. The level weighat of dust on leaf has effect to stomata conditions, such as surface of stomata become smaller and shape of stomata become irregular, but amount and size of stomata didn’t influenced. In some case, leaf can be identifid by visible symptoms of injury such as chlorotic at the leaf veins, which caused by SO2 or black or brown flecks at the leaf veins, which caused by NOx

Androgynomonoecious Jatropha curcas: Chromosomes, Isozymes, and Flowers Gender

Jatropha curcas (J. curcas) is usually monoecious plants, which have male and female flowers on the same inflorescence. However, J. curcas can be found as an androgynomonoecious plant (have male, female, and hermaphrodite flowers), even though very rare. Androgynomonoecious J. curcas can be identified after six months of planting when it had started flowering. Therefore, it is important to identify the characteristics of androgynomonoecious J. curcas that can differentiate between androgynomonoecious and monoecious plants in earlier stages of growth. The objectives of the research were to observe isozymes, chromosome and flowers gender of androgynomonoecious and monoecious J. curcas Banten and Lampung accessions. Seeds from five genotypes of J. curcas were used in the research. The observation was carried out on the chromosome and isozymes (Peroxidase and Esterase isozymes) could be used as markers to differentiate androgynomonoecious and monoecious plants. Observations about the flower gender from offsprings derived from different seeds were important to know the inheritance of flower gender. The androgynomonoecious and monoecious J. curcas were diploid with number of chromosomes 2n=2x=22. The chromosomes of androgynomonoecious have longer than that of monoecious J. curcas. The isozymes of androgynomonoecious J. curcas had four alleles and monoecious J. curcas (Banten female monoecious) had three alleles. The flower inflorescence and gender derived from androgynomonoecious plants were unstable, due to androgynomonoecious is intermediate state

Angsana (Pterocarpus Indicus) sebagai Bioindikator untuk Polusi di Sekitar Terminal Lebak Bulus

Jakarta as one of the biggest city in Indonesia, it own more than 6.506.244 units of motor vehicles. The combustion of fossil fuels in motor vehicles can cause air pollution. Station is represented as one of heavy pollution location. The observation has be done by abservate the amount of vehicles, stomatal characteristic, and weight of dust on Angsana leaves, which growth around Lebak Bulus station. As the result, there is relation between weight of dust on leaf and stomatal characteristic, with r value = 1. The level weighat of dust on leaf has effect to stomata conditions, such as surface of stomata become smaller and shape of stomata become irregular, but amount and size of stomata didn\u27t influenced. In some case, leaf can be identifid by visible symptoms of injury such as chlorotic at the leaf veins, which caused by SO2 or black or brown flecks at the leaf veins, which caused by NOx

Potensi Jenis Tumbuhan Bawah Berkhasiat Obat di Hutan Kota Raggawulung, Kabupaten Subang

The objective of this research was to know the understory species diversity and to identified the potency of medicinal plants in Ranggawulung Urban Forest. The method of this research is vegetation analysis using circular plot (4 m in diameter), we used 30 plot in the site. We counted number of individuals and species richness. Importance Value Index, Simpson's, and Shanon-Wiener Index was calculated to describe it's diversity. The result showed Ranggawulung Urban Forest had high of understory diversity (Shanon-Wiener Index 3,36). There was 56 understory species, and 19 of them was identified as medicinal plants. There are Ageratum conyzoides, Piper aduncum, Sida rhombifoli, Eupatorium odoratum, and Turnera ulmifolia. The utilization of this potency and the effort to conserve both ex-situ and insitu are also elaborated

Biosynthesis of ZnO Nanoparticles Using Pumpkin Peel Extract (Cucurbita moschata) and its Applications as Semiconductor in Dye Sensitized Solar Cell (DSSC)

ZnO nanoparticles are semiconductor materials that can be used in Dye Sensitized Solar Cells (DSSC). ZnO nanoparticles can be synthesized using pumpkin peel extract (Cucurbita moschata) which functions as a reducing agent, stabilizer, and capping agent. Zn(CH3COO)2.2H2O precursor was used with a concentration of 0.15 M at various pH 7, 8, and 9 reacted with pumpkin peel extract. The functional groups of pumpkin peel extract were characterized using Fourier Transform Infrared Spectroscopy (FTIR), the samples were analyzed by TEM and XRD. The resulting ZnO nanoparticles were used as semiconductors in Dye Sensitized Solar Cell (DSSC) using dyes from mangosteen peel.The FTIR results showed the presence of functional groups O-H hydroxy, CH2, secondary amides (R-CO-NR2, C-H and phosphate (PO43-). XRD results showed that ZnO produced wurzhite crystals with a hexagonal system and the smallest crystal size was 18.99 nm. TEM results showed that ZnO synthesized at a concentration of 0.15 M and pH 8 had a spherical particle shape with a size of 24.90 nm, while the DSSC test results had an efficiency of 9.06 x 10-4%