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 BAP terhadap Pertumbuhan Stek Buku Tunggal In vitro Tanaman Zaitun (Olea europea L.)
Abstrak: Olive (Olea europaea L) is a native plant of Mediteranian region. This plant is largely cultivated and a major commodity that plays an important role in the economy of that region. Olive plant propagation is still using conventional technique by stem cutting and seeds. The stem cutting method has low efficiency rate and requires high control of enviromental conditions. In vitro propagation can be used as an alternative to produce olive plants rapidly and more efficiently. The aims of this research are to know the most effective medium and BAP plant growth regulator concentration for the growth of olive nodal segment culture and to find a better method of explant sterilization. Sterilization methods consisted of four types of treatment that were a standard surface sterilization, the application of HgCh, chloramphenicol, or Plant Preservative Mixture (PPM) in the culture medium. The most effective sterilization method was the standard sterilization plus PPM. The basic media used were DKW or WPM, and the BAP concentrations were 0, 1, 2, and 4 ppm. The result of this research showed that DKW medium without BAP (0 ppm) was the most effective formulation for the growth of olive nodal segment.
Keyword: Bogor Agricultural University, Olea europaea, medium DKW, in vitro culture

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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