Judul: Growth of Roots and Shoots of Mulwo Stem Cuttings  (Annona reticulata L.) with Auxin Administration
Abstrak: Tanaman mulwo (Annona reticulata L., Annonaceae) mirip dengan tanaman sirsak dan srikaya. Tanaman sirsak dan srikaya dapat dikembangbiakkan dengan cara generatif dan vegetatif. Perkembangbiakan vegetatif dengan stek dapat dilakukan melalui stek batang. Selain itu, diperlukan zat pemacu perakaran pada stek batang yaitu auksin. Namun, penelitian mengenai perbanyakan tanaman mulwo dengan stek batang belum banyak dilakukan. Penelitian ini bertujuan menentukan konsentrasi auksin yang sesuai untuk memacu pertumbuhan akar dan tunas pada stek batang tanaman mulwo. Rancangan penelitian yang digunakan adalah Rancangan Acak Lengkap (RAL). Perlakuan konsentrasi auksin (Rootone-F) yang digunakan terdiri dari 4 taraf yaitu 0 mg/mL, 2000 mg/mL, 4000 mg/mL, dan 10000 mg/mL. Perlakuan tersebut diulang sebanyak 5 kali ulangan. Parameter yang diamati adalah jumlah tunas, jumlah akar adventif, dan jumlah inisiasi akar. Hasil penelitian menunjukkan bahwa konsentrasi Rootone-F 2000 mg/mL merupakan perlakuan dengan jumlah tunas terbanyak dan dapat memacu munculnya inisiasi akar., Mulwo (Annona reticulata L., Annonaceae) is similar to soursop and srikaya. Soursop and srikaya plants can be propagated generatively and vegetatively. Vegetative propagation by cuttings can be done through stem cuttings. In addition, a rooting agent is needed for stem cuttings, namely auxin. However, research on the propagation of mulwo plants by stem cuttings has not been widely carried out. This study aims to determine the concentration of auxin to stimulate root and shoot growth on stem cuttings of mulwo plants. The research design used was a Completely Randomized Design (CRD). The concentration treatments of auxin (Rootone-F) consisted of 4 levels, namely 0 mg/mL, 2000 mg/mL, 4000 mg/mL, and 10000 mg/mL. The treatment was repeated 5 times. The parameters observed were the number of shoots, the number of adventitious roots, and the number of root initiations. The results showed that the concentration of Rootone-F 2000 mg/mL was the treatment with the highest number of shoots and could stimulate the emergence of root initiation.
Keyword: Number of shoots, Root initiation, Rootone-F

Judul: Pengaruh pemberian ZPT (Rootone-F) terhadap pertumbuhan stek Duabanga moluccana, Blume.
Abstrak: INTRODUCTION Insufficient supply of raw materials to support wood based industries in Indonesia cause of the changes on orientation for wood supply from natural forest to plantation forest in developing fast growing tree species. Duabanga mollucana Blume, is an Indonesian native fast growing tree species that have good characteristic as raw materials for wood based industries. Vegetative propagation can be done to this species besides their ability to be propagated from seed. Shoot and stem cuttings are alternative ways to obtain qualified seedlings in appropriate amounts and timely manner. Plant growth regulator treatment was expected to increase cutting's survival rate and rooting percentage. Objective of this research was to determine the effect of plant growth regulator on the growth of shoot and stem cutting of Duabanga moluccana. This research would be useful to provide information for the production for high quality seedlings. MATERIAL AND METHOD This research was carried out on green house with KOFFCO system (Komatsu-Forda Fog Cooling System) at Balai Penelitian dan Pengembangan Hutan dan Konservasi Alam, Gunung Batu, Bogor, West Java. from August to october 2010. Materials used in this research were shoot and stem of Duabanga seedlings from selected mother trees (M07) from SEAMEO BIOTROP, Rootone-F, Dithane M-45, rice husk, cocopeat, and zeolite. The experimental design in this research was completely randomized design with 2 factors and 3 replicates. The first factor was source of cutting material (shoot and stem) and the second factor was concentration of plant growth regulator (0 ppm, 500 ppm, 1000 ppm, and 1500 ppm). Growth parameters observed were (1) survival rate, (2) rooting percentage, (3) number of roots, (4) root length, (5) root fresh weight and dry weight (6) shoot fresh weight and dry weight (7) shoot-root ratio. Data was processed with analysis of variance then followed by fisher's LSD test. RESULT AND CONCLUSION Analysis of variance was conducted to explore the impact of all factors on growth parameters, shoot cutting was found to be the most significantly different related to each growth parameters observed; those were (1) survival rate, (2) rooting percentage, (3) number of roots, (4) root length, (5) root fresh weight and dry weight (6) shoot fresh weight and dry weight (7) shoot-root ratio , beside that, stem cuttings was not significantly different related to those growth parameters observed. Rooting percentage on shoot cuttings was 82% and stem cuttings was 0%. Plant growth regulator treatments were not significantly affected cuttings, because control (0 ppm) on shoot cuttings showed high rooting percentage value (77%), followed by 500 ppm (80%), 1500 ppm (83%), and 1000 ppm (87%). Interaction between source of materials and concentration of plant growth regulators was also not significantly related on each growth parameters observed because all of stem cutting could not survive during root primordial initiation, shoot cuttings was also not significantly different related to those growth parameters observed, because control (0 ppm) on shoot cuttings produced significant survival rate (77 %).
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Judul: Closed Knight’s Tour pada Papan Catur Berbentuk Persegi Panjang dengan Ukuran Maksimal 8 × 8
Abstrak: Closed Knight’s Tour merupakan langkah kuda yang mengunjungi setiap kotak pada papan catur tepat satu kali dengan langkah kuda berawal dan berakhir pada kotak yang sama. Graf yang terbentuk dari closed knight’s tour dinotasikan sebagai graf G(m,n), dengan m adalah banyaknya baris dan n adalah banyaknya kolom. Graf tersebut memuat Hamiltonian cycle. Sebuah graf terhubung G adalah graf bipartite jika dan hanya jika graf tersebut tidak memiliki cycle dengan panjang ganjil. Papan catur yang memenuhi syarat cukup untuk memiliki closed knight’s tour adalah papan catur berukuran 5 × 6, 5 × 8, 6 × 6, 6 × 7, 6 × 8, 7 × 8, dan 8 × 8.
Keyword: bipartite, closed knight’s tour, hamiltonian cycle, knight’s tour, teori graf