Judul: Pengaruh 2,4-D dan BAP terhadap Organogenesis Anthurium vittariifolium secara In Vitro
Abstrak: Anthurium vittariifolium merupakan tanaman hias pot yang belum banyak dikenal dan dipelajari sehingga perlu dilakukan perbanyakan secara in vitro untuk dapat diproduksi secara massal. Penelitian ini bertujuan mempelajari pengaruh 2,4-D dan BAP serta interaksinya terhadap organogenesis A. vittariifolium secara in vitro. Penelitian dilaksanakan pada bulan November 2022 sampai April 2023 di Laboratorium Kultur Jaringan 3, Departemen Agronomi dan Hortikultura, Fakultas Pertanian, Institut Pertanian Bogor. Penelitian ini menggunakan Rancangan Kelompok Lengkap Teracak dua faktor. Faktor pertama yaitu auksin 2,4-D (0; 0,3; dan 0,6 mg L-1). Faktor kedua yaitu sitokinin BAP (0; 1; 2; dan 3 mg L-1). Terdapat 12 perlakuan dengan 5 ulangan sehingga diperoleh 60 satuan percobaan. Hasil penelitian menunjukkan perlakuan 2,4-D secara tunggal memberikan pengaruh nyata terhadap persentase eksplan membentuk kalus. Perlakuan BAP secara tunggal memberikan pengaruh nyata hingga sangat nyata terhadap persentase kalus beregenerasi membentuk tunas. Interaksi 2,4-D dengan BAP memberikan pengaruh nyata hingga sangat nyata pada eksplan membentuk kalus dan jumlah tunas. Tunas terbanyak dihasilkan dari media yang diperkaya BAP 1 mg L-1 yang berinteraksi dengan pemberian 2,4-D 0 dan 0,6 mg L-1 yang menghasilkan 10 tunas walaupun tidak berbeda nyata dengan beberapa perlakuan lainnya., Anthurium vittariifolium is a cut flower that is not widely known and studied, hence in vitro propagation is necessary for mass production. This study aims to investigate the effects of 2,4-D and BAP and their interactions on the organogenesis of A. vittariifolium in vitro. The research was conducted from November 2022 to April 2023 at the Tissue Culture Laboratory 3, Department of Agronomy and Horticulture, Faculty of Agriculture, Bogor Agricultural University. This study used a Completely Randomized Block Design with two factors. The first factor was the auxin 2,4-D (0; 0.3; and 0.6 mg L-1). The second factor was the cytokinin BAP (0; 1; 2; and 3 mg L-1). There were 12 treatments with 5 replications, resulting in a total of 60 experimental units. The results showed that the single treatment of 2,4-D had a significant effect on the percentage of explants inducing callus. The single treatment of BAP had a significant effect on the percentage of regenerating callus-forming shoots. The interaction between 2,4-D and BAP had a significant to highly significant effect on the percentage of explants inducing callus and the number of shoots. The majority of callus colors formed were white, yellow, light green, green, and dark green, with 100% compact callus formation. The highest number of shoots resulted from media enriched with BAP 1 mg L-1 which interacted with 2,4-D 0 and 0.6 mg L-1 which produced 10 shoots although not significantly different from some of the other treatments.
Keyword: auxin, regenerating callus, somatic embryo

Judul: Effect of 6-Benzylaminopurine and Indole Acetic Acid on in vitro shoot growth of Anthurium crystallinum Linden & André
Abstrak: Anthurium crystallinum Linden & André atau dikenal dengan tanaman kuping gajah termasuk dalam golongan anthurium daun karena memiliki keindahan pada daunnya, dan memiliki nilai komersial di Indonesia maupun dunia. Penelitian ini bertujuan mempelajari pengaruh BAP dan IAA serta interaksinya terhadap pertumbuhan tunas A. crystallinum Linden & André secara in vitro. Penelitian dilaksanakan pada bulan Juli sampai November 2023 di Laboratorium Kultur Jaringan 3, Departemen Agronomi dan Hortikultura, Fakultas Pertanian, Institut Pertanian Bogor. Penelitian ini menggunakan Rancangan Kelompok Lengkap Teracak (RKLT) dua faktor. Faktor pertama yaitu sitokinin BAP (0; 0,5; 1; 1,5; dan 2 mg L-1). Faktor kedua yaitu auksin IAA (0; 0,25; dan 0,5 mg L-1). Terdapat 15 perlakuan dengan 5 ulangan. Setiap ulangan terdiri 2 botol kultur. Setiap botol berisi satu eksplan, sehingga diperoleh 150 satuan percobaan. Hasil penelitian menunjukkan perlakuan IAA berpengaruh terhadap persentase eksplan berkalus. Perlakuan BAP secara tunggal berpengaruh pada persentase bertunas, rata-rata jumlah buku batang (nodus), rata-rata jumlah tunas aksilar, rata-rata jumlah daun, dan menghambat pertumbuhan akar. Konsentrasi BAP 1,5 mg L-1 mampu menghasilkan persentase bertunas 100%, jumlah rata-rata tunas dan daun per eksplan terbanyak. Interaksi IAA dan BAP berpengaruh terhadap persentase eksplan berkalus dan rata-rata jumlah buku tunas., Anthurium crystallinum Linden & André or known as the kuping gajah’s plant is included in the leaf anthurium group because it has beautiful leaves and has commercial value in Indonesia and the world. This research aims to study the effect of BAP and IAA and their interactions on shoot growth of A. crystallinum Linden & André in vitro. The research was carried out from July to November 2023 at Tissue Culture Laboratory 3, Department of Agronomy and Horticulture, Faculty of Agriculture, Bogor Agricultural Institute. This study used a two-factor Randomized Complete Group Design (RKLT). The first factor is cytokinin BAP (0; 0.5; 1; 1.5; and 2 mg L-1). The second factor is auxin IAA (0; 0.25; and 0.5 mg L-1). There were 15 treatments with 5 replications. Each replication consisted of 2 culture bottles. Each bottle contains one explant, so that 150 experimental units are obtained. The results showed that IAA treatment had effect on the percentage of callus explants. BAP single treatment had effect on the percentage of shoots, the average number of stem nodes (nodes), the average number of axillary shoots, the average number of leaves, and inhibited root growth. A BAP concentration of 1.5 mg L-1 was able to produce a germination percentage of 100%, the highest average number of shoots and leaves per explant. The interaction of IAA and BAP had effect on the percentage of callus explants and the average number of shoot nodes.
Keyword: auxin, callus, kuping gajah, node, cytokinin

Judul: Truncated Stop Loss as a Optimal Solution of Reinsurance Agreement in One-Period Model
Abstrak: Reinsurance is one of risk management efforts of an insurance company, which is called the cedent. Similar with insurance, reinsurance constitutes the cedent to pay the premium. We consider one-period reinsurance model and derive a rule which minimizes the ruin probability of the cedent for a fixed reinsurance premium. Therefore, it is needed to construct an optimal reinsurance agreement for the cedent. The premium is calculated according to four different principles, i.e. economic, generalized zero-utility, Esscher, and mean-variance principles. Stop loss is a reinsurance contract which protect the insurance company for losses that exceed a certain amount. The result of this research shows that a truncated stop loss is an optimal agreement in the class of all reinsurance contracts with various premiums calculated using above mentioned principles.
Keyword: