Judul: Pengembangan Teknologi Perbanyakan Bibit nenas smooth cayenne secara in vivo melalui aplikasi auksin dan sitokinin
Abstrak: Pineapple plantation needs 40.000-60.000 seedlings per hectare, so it is important to have simple, efficient and effective propagation technology. The objectives of this research are to study the effect of IBA and BA to improve the success of seed production by in vivo. The study was conducted in three experiments. The first and the second experiment were to study the effect of indole-3-butyric acid (IBA) at 0, 25, 50 ppm and Benzyl Adenine (BA) at 0,25,50 and 75 ppm on the successful of basal leaf cuttings from stem and crown of pineapple GP-1 (Ananas comosus L. Merr). The third experiment was to determine the effect of sytokinin on the different size of buds generated from crown leaf cuttings. The result showed that leaf cutting from stem potential used as an alternative materials for seed propagation of pineapple. Increased of auxin concentration up to 50 ppm on leaf cuttings of stem inhibit shoot height. Contrarily, cytokinin treatment up to 50 ppm increased the height of shoots. Application of auxin up to 50 ppm on leaf cuttings of crown increase the percentage of rooted cuttings and percentage of budding per shoots (2-3 shoot per cutting), but application of cytokines up to75 ppm suppress seedling height, width leave and reduce the emergence rate of shoots at 50 ppm. Application of cytokinin (BA) 25 ppm and 50 ppm increased the percentage of sprouted cuttings and number of nodules on small buds and medium buds. Percentage sprouted cutting on small buds higher than medium and bigger buds. Using economic analysis, it is showed that IBA 50 ppm application on crown leaf cuttings is the most optimum materials used for seed propagation by in vivo.The success of seed multiplication in vivo through cuttings leave from the crown better than cuttings from leave stem.
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Judul: The Effect of Cytokinin and Auxin Treatment in the Multiplication Through in vitro Phase to Acclimatization of Pineapple (Ananas comosus (L) Merr.) cv. Smooth Cayenne.
Abstrak: The mass propagation of pineapple are hampered by low multiplication rate in natural way, therefore in vitro propagation is an alternative to overcome mass production. To support mass propagation then we need the best acclimatization way to support multiplication phase to achieved the highest mass propagation rate. The objective of this research was to elucidate the effect of Cytokinin (BA) and Auxin (NAA) that had been applied during multiplication of sub culture I and sub culture II through in vitro phase to acclimatization of pineapple (Ananas comosus L. Merr) cv. Smooth Cayenne. This research was conducted in greenhouse laboratory at Center for Tropical Fruits Studies, IPB Baranangsiang, Bogor, since July until November 2006. This research used 20 combination of treatment from two factors for each subculture 1 and subculture 2. Each subculture conducted in six groups to accomodate difference planlet’s acclimatization readiness. The first factor was 0,00μM, 4,40μM, 8,80μM, 13,32μM, and 17,76μM of BA, and the second factor was 0,00μM, 0,50μM, 1,00μM, 2,00μM of NAA. Number of leaves and plant’s height were examined every week until 13th week after acclimatization. Examination data were statistically analyzed using Complete Randomized Block Design and the means were compared with Duncan’s Multiple Range Test (DMRT) procedure at 5% level of significance. The result showed that treatment of 17,76μM BA and 2,00μM NAA, and its interactions have the highest score for subculture 1. The result of 2,00μM NAA showed the highest performance for subculture 2. Overall performance showed that subculture 1 has better growth rate than subculture 2.
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Judul: Konstruksi Persamaan Friedmann Alam Semesta Friedmann-Lemaitre-Robertson-Walker Termodifikasi Materi Gelap Superfluida
Abstrak: Kosmologi merupakan salah satu objek kajian dari teori relativitas umum. Salah satu model dalam kosmologi adalah model kosmologi Friedmann. Model kosmologi Friedmann dibangun berdasarkan asumsi bahwa materi dan energi terdistribusi secara homogen dan isotropik di alam semesta. Teori relativitas umum dapat dimodifikasi melalui pendekatan teori materi gelap superfluida (MGS). Persamaan medan Einstein untuk teori MGS dapat dirumuskan melalui prinsip aksi dengan memodifikasi Lagrangian pada aksi teori MGS. Selanjutnya dengan memilih metrik Friedmann-Lemaitre-Robertson-Walker (FLRW) datar dengan indeks kurvatur sama dengan nol, dapat dibangun suatu bentuk persamaan Friedmann yang dimodifikasi teori MGS.
Keyword: kosmologi, teori materi gelap superfluida, persamaan medan Einstein, metrik FLRW, persamaan Friedmann.