Judul: Acclimatization rate at different planlet Ages, Application Concentrations of Paclobutrazol and Growmore
Abstrak: Stevia rebaudiana Bertoni dikenal sebagai tanaman pemanis yang dimanfaatkan sebagai alternatif untuk menggantikan konsumsi gula bagi penderita diabetes. Diperlukan proses adaptasi lapang pada stevia yang telah ditanam secara in vitro, yaitu aklimatisasi. Penelitian ini bertujuan mempelajari daya hidup planlet Stevia rebaudiana Bertoni pada beberapa umur sumber planlet in vitro serta kombinasi konsentrasi paklobutrazol dan growmore yang berbeda. Aklimatisasi dilakukan dengan aplikasi paklobutrazol sebanyak tiga taraf konsentrasi, yaitu 0 mg L-1, 1 mg L-1, 2 mg L-1, dan Growmore dengan tiga taraf konsenstrasi yaitu 0 g L-1, 0,5 g L-1, 1 g L-1. Terdapat tiga perlakuan umur sumber planlet yaitu 1, 3, dan 5 bulan. Hasil penelitian menunjukkan pengaruh perlakuan interaksi paklobutrazol dan Growmore berpengaruh sangat nyata pada 1, 2, 3, 5, 6, 7 dan 8 MSA dan berpengaruh nyata pada 4 MSA terhadap persentase daya hidup stevia. Interaksi kombinasi perlakuan paklobutrazol dan Growmore dengan umur sumber planlet terhadap jumlah daun berpengaruh sangat nyata pada 1, 2, 3, 6, dan 8 MSA dan berpengaruh nyata pada 4 dan 5 MSA. Perlakuan yang menghasilkan persentase hidup terbaik saat aklimatisasi terdapat pada sumber eksplan berumur 5 bulan yakni 100 % dengan kombinasi paklobutrazol konsentrasi 1 mg L-1 dan growmore konsentrasi 1 g L-1. Hasil perlakuan kombinasi paklobutrazol dan growmore tidak berpengaruh nyata terhadap tinggi tanaman dan berpengaruh sangat nyata terhadap jumlah daun pada 1,2,3,6, dan 8 MSA. Perlakuan umur sumber planlet berpengaruh sangat nyata terhadap persentase hidup planlet stevia pada 1-4 MSA dan berpengaruh sangat nyata terhadap tinggi tanaman 1 hingga 8 MSA., Stevia rebaudiana Bertoni is known as a sweetener plant that is used as an alternative to replace sugar consumption for diabetics. A field adaptation process for stevia that has been grown in vitro is required, namely acclimatization. This study aimed to study the viability of the plantlet Stevia rebaudiana Bertoni at several ages of explant sources in vitro and the combination of different concentrations of paklobutrazole and growmore. Acclimatization was carried out with the application of three concentration levels of paklobutrazole, that is 0 mg L-1, 1 mg L-1, 2 mg L-1, and Growmore with three levels of concentration, that is 0 g L-1, 0.5 g L-1, 1 g L-1. There were three treatments of plantlet source age, that is 1, 3, and 5 months. The results showed that the interaction treatment of paklobutrazole and Growmore had a very significant effect on 1, 2, 3, 5, 6, 7 and 8 Week After Aclimatization and a significant effect on 4 Week After Aclimatization on the percentage of viability of stevia. The interaction of the combination treatment of paklobutrazole and Growmore with the age of the plantlet source on the number of leaves had a very significant effect on 1, 2, 3, 6, and 8 Week After Aclimatization and significantly affected 4 and 5 Week After Aclimatization. The treatment that produced the best percentage of survival until 100% during acclimatization was found in explant sources aged 5 months, with a combination of 1 mg L-1 concentration of paklobutrazole and 1 g L-1 concentration of growmore. The results of the combination treatment of paklobutrazole and
Keyword: In vitro, chloroplast, sweetener

Judul: The Response of Giving Gamal, Calliandra, and  Lamtoro Leaves Compost Fertilizer to Stevia Plant (Stevia rebaudiana Bertoni) Growth
Abstrak: Tanaman stevia (Stevia rebaudiana Bertoni) merupakan tanaman perdu-perduan yang dikenal sebagai tanaman manis yang dapat menggantikan gula tebu. Tanaman ini dikategorikan sebagai tanaman hari pendek yang dapat dipanen dalam waktu 40-60 HST. Pupuk kompos pada dasarnya merupakan pupuk organik yang dibuat dengan memanfaatkan proses pelapukan dari interaksi mikroorganisme dan bakteri pembusuk. Salah satu serasah yang dapat dimanfaatkan diantaranya adalah serasah gamal, kaliandra dan lamtoro. Tujuan penelitian ini adalah mengetahui pengaruh ketiga kompos tersebut terhadap pertumbuhan dan produktivitas tanaman stevia. Metode analisis data yang digunakan dalam penelitian ini adalah Rancangan Acak Lengkap (RAL) dengan satu faktor dan empat perlakuan. Hasil penelitian menunjukkan bahwa pupuk kompos berpengaruh nyata terhadap semua variabel yang diamati diantaranya tinggi, diameter, jumlah daun, berat basah dan biomassa tanaman. Pertumbuhan dan produktivitas tanaman stevia tertinggi dihasilkan oleh tanaman stevia pada perlakuan P3 (kompos lamtoro), sedangkan hasil terendah dihasilkan pada perlakuan P0 (kontrol)., The stevia plant (Stevia rebaudiana Bertoni) is a herbaceous plant known as a sweet plant that can replace cane sugar. This plant is included as a shortday crop that can be harvested within 40-60 DAP. Compost is basically an organic fertilizer that is made by utilizing the weathering process from the interaction of microorganisms and decomposing bacteria. One of the litters that can be utilized include gamal, calliandra and lamtoro litter. The purpose of this study was to determine the effect of the three composts on the growth and productivity of the stevia plant. The data analysis method used in this study was a completely randomized design (CRD) with one factor and four treatments. The results showed that compost had a significant effect on all observed variables including height, diameter, number of leaves, fresh weight and plant biomass. The highest growth and productivity of stevia plants were produced by stevia plants in treatment P3 (lamtoro compost), while the lowest yields were produced in treatment P0 (control).
Keyword: fertility, productivity, rebaudioside, stevioside A, sugar

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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