Judul: Root Stimulation of Olive (Olea europaea L.) Shoot Cuttings by Light Intensities, Auxin Concentrations, and Different Growing Media
Abstrak: Zaitun (Olea europaea) merupakan pohon yang mampu bertahan hidup dalam jangka waktu lama. Di Indonesia, tanaman zaitun dimanfaatkan daunnya, misalnya untuk minuman sumber antioksidan. Tanaman zaitun diperbanyak secara vegetatif dengan teknik stek pucuk. Penelitian zaitun dengan stek pucuk ini penting dilakukan agar lebih efisien untuk menjamin ketersediaan bibit zaitun. Penelitian ini bertujuan untuk menentukan jenis media tanam, konsentrasi auksin (Rootone-F), dan intensitas cahaya yang sesuai untuk pembentukan akar dari stek pucuk zaitun. Perlakuan yang diberikan adalah kombinasi naungan yang terdiri dari 2 taraf (naungan dan tanpa naungan), media tanam yang terdiri dari 5 taraf (tanah, pasir, campuran pasir dan tanah (1:1), sekam, dan arang sekam), dan konsentrasi Rootone-F yang terdiri dari 3 taraf (0, 50, dan 100 mg/mL). Parameter yang diamati adalah persentase hidup dan jumlah akar stek. Hasil penelitian menunjukkan bahwa naungan, media tanah, dan konsentrasi Rootone-F 50 mg/mL (NT0.5) merupakan kombinasi perlakuan terbaik untuk memacu pertumbuhan stek zaitun, dengan jumlah stek hidup dan jumlah akar terbanyak., Olive (Olea europaea) is a tree that can live very long. In Indonesia, its leaves are used for example, as olive tea which is rich in antioxidants. Olive plant is propagated vegetatively by shoot cutting. The shoot cutting technique still needs an improvement to be more efficient at ensuring the availability of olive seedlings. Therefore this study aimed to determine the type of planting medium, the concentration of auxin (Rootone-F), and the appropriate light intensity for root formation from the olive shoot cuttings. This research applied treatments combinating shade treatment, which consisted of 2 levels (shade and no shade), planting media consisting of 5 types (soil, sand, a mixture of sand and soil (1:1), husk, and husk charcoal), and 3 levels (0, 50, and 100 mg/mL) of Rootone-F concentration. The parameter observed were the percentage of cutting survival and the number of rooted cuttings. The results showed that shade, soil media, and concentration of Rootone-F 50 mg/mL (NT0.5) was the best combination of treatments to promote rooting of olive cuttings, with the highest number of live cuttings and number of roots.
Keyword: Root initiation, Rootone-F, shoot cuttings

Judul: Pengaruh Media Dasar dan Konsentrasi 2-iP pada pertumbuhan Stek Mikro Tanaman Zaitun (Olea europea L.)
Abstrak: Olive (Olea europaea L.) is a plant that can grow in many types of soil and environmental conditions as well as easy to maintain. The demand for fruit and olive oil is high. However, cultivation of olive in Indonesia is still limited and treated traditionally. Tissue culture techniques can be an alternative in producing seeds in large amount and in shorter time. The purpose of this study is to find the most effective basic medium and concentration of 2-iP for growing axillary bud of olive (Olea europaea L.) in vitro on the micro cutting. Olive explants were taken from the field and were sterilized with four sterilization methods. It was then planted in Murashige and Skoog (MS) media for two weeks that served as pretreatment phase. The culture which survived from sterilization was moved to the basic media of Woody Plant (WP) and Driver Kuniyuki for Walnut (DKW) enriched with 2-iP at the concentration of 0, 1, 2, 4 ppm in each medium. The results of this study showed that WP medium without 2-iP was the most effective medium for in vitro growth and development of olive bud than the others and the sterilization with the addition of 0.02 % Plant Preservative Mixture (PPM) biocide in the medium was the most effective sterilization method.
Keyword: Bogor Agricultural University, WP medium, DKW medium, 2-iP, micro cutting, Olea europaea

Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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