Judul: Morphology and Stomata Performance of Lipstick Flower (Aeschynanthus Soedjana Kassan) After Polyploidy Induction with Colchicine and Oryzalin
Abstrak: Tanaman hias memiliki karakter yang bervariasi. Keragamannya dapat ditingkatkan dengan induksi mutasi. Salah satu perlakuan mutasi induksi adalahdengan pembentukan tanaman poliploid sehingga dapat menghasilkan satuindividu yang memiliki set kromosom lebih dari dua pasang pada sel somatiknya. Penelitian ini menggunakan mutagen kolcisin dan orizalin dengan masing-masing tiga konsentrasi. Bahan tanam yang digunakan yaitu stek batang dengan Rancangan Acak Lengkap (RAL) satu faktor. Percobaan menggunakan tiga kali ulangan pada tujuh perlakuan yaitu kontrol, kolcisin 0,05%, 0,10%, 0,15%, serta orizalin 0,005%, 0,010%, dan 0,015%. Hasil penelitian menunjukkan bahwa perlakuan kolcisin dan orizalin berpengaruh nyata terhadap karakter morfologi tanaman bunga lipstik diantaranya panjang tunas total, panjang ruas, pertambahan panjang daun, lebar daun, dan tebal daun. Karakter anatomi stomata yang dilakukan tidak menunjukkan perbedaan yang nyata. Tanaman dengan perlakuan mutagen memiliki frekuensi stomata yang lebih banyak daripada kontrol., Ornamental plants have varied characters. Diversity can be increased by induction of mutations. One treatment for induced mutations is to form polyploid plants so that they can produce one individual that has more than two pairs of chromosome sets in its somatic cells. This research used the mutagens colchicine and oryzalin at three concentrations each. The planting material used was stemcuttings with a one-factor Completely Randomized Design (CRD). The experiment used three replications in seven treatments, namely control, colchicine 0,05%, 0,10%, 0,15%, and oryzalin 0,005%, 0,010%, and 0,015%. The results of the research showed that colchicine and orizalyn treatments had a significant effect on the morphological characters of lipstick flower plants, including total shoot length, internode length, increase in leaf length, leaf width and leaf thickness. The anatomical characteristics of the stomata did not show any real differences. Mutagen-treated plants had a higher frequency of stomata than controls.
Keyword: mutagen, mutation, ornamental plants

Judul: The Effect of Colchicine Treatment on Morphological Diversity of Portulaca (Portulaca grandiflora Hook)
Abstrak: Portulaka atau lebih dikenal tanaman krokot adalah salah satu jenis tanaman berbunga cantik yang hidup di daerah tropis yang mudah untuk dibudidayakan karena pertumbuhannya yang terbilang cepat. Salah satu jenisnya, yaitu Portulaca grandiflora Hook atau biasa disebut Sutra Bombay yang merupakan tanaman sekulen dari Amerika Selatan. Mutasi pada portulaka dapat dilakukan dengan berbagai jenis, seperti mutasi kimia ataupun mutasi fisik. Mutasi kimia pada jenis portulaka salah satunya dengan penggunaan mutagen kimia berupa kolcisin. Penelitian ini bertujuan mengetahui pengaruh pemberian kolcisin terhadap morfologi tanaman portulaka (Portulaca grandiflora Hook). Penelitian ini dilaksanakan selama 4 bulan di Kebun Percobaan Leuwikopo IPB menggunakan Rancangan Acak Lengkap (RAL) faktorial. Penelitian menunjukkan adanya perbedaan respon morfologi pada setiap perlakuan konsentrasi dan genotipe yang digunakan. Karakter kuantitatif yang diamati pada perlakuan genotipe Bicolor dengan konsentrasi sebesar 0,15% menunjukkan respon yang paling baik untuk peubah tinggi tanaman dan genotipe Banana dengan konsentrasi 0,2% untuk peubah diameter batang. Pada genotipe Peach dengan konsentrasi 0,15% menunjukkan hasil yang paling baik terhadap peubah jumlah bunga. Selain itu, jumlah cabang yang paling baik pada genotipe Orange dengan konsentrasi 0,05%. Hasil berbeda pada karakter kualitatif yang diamati menunjukkan belum ada perbedaan yang nyata pada peubah bentuk dan warna bunga saat pemberian konsentrasi di setiap genotipenya., Portulaca or better known as krokot is one type of beautiful flowering plan that lives in the tropics which is easy to cultivate because its fairly fast to growth. One type, namely Portulaca grandiflora Hook or commonly called Sutra Bombay is a succulent plant from South America. Mutations in portulaca can be carried out in various type, such as chemical mutations and physical mutations. One of the chemical mutations in the portulaca species is the use of chemical mutagen in the form of colchicine. This research was conducted for 4 months at the Leuwikopo Experimental Garden of IPB using a factorial Completely Randomized Design (CRD). The research showed that there were differences in morphological responses to each concentration and genotype treatment used. The quantitative characters observed in the Bicolor genotype treatment with a concentration of 0.15% showed the best response for the plant height variable and the Banana genotype with a concentration of 0.2% for the stem diameter variable. The Peach genotype with a concentration of 0.15% showed the best results on the number of flowers variable. In addition, the best number of branches on the Orange genotype with a concentration of 0.05%. The different results on the observed qualitative characters showed that there were no significant differences in the shape and color of the flowers when the concentration was given to each genotype.
Keyword: concentration, genotype, mutation

Judul: Dynamic New Keynesian Model for Unemployment and Inflation Rate.
Abstrak: This paper deals with a scientific analysis of the equilibrium level of hiring, employment and unemployment. The basic model being used is a standard new Keynesian model, which states that utility function depends on consumptions and working hours. Utility maximization refers to a standard labour supply equation, with the marginal cost’s dynamics on new Keynesian model simply reflects movements in real wages and productivity. Furthermore, trade-off between output and inflation stabilization can be considered using the new Keynesian Phillips curve. Dynamic general equilibrium model is a model that can be used to study interactions between market imperfections and nominal rigidities, which is capable of overcoming the main shortcoming of the standard new Keynesian model. In the general equilibrium model there are three groups of the economy agents, namely households, firms and monetary authority. The results of this research science that bargaining processes between firms and workers will yield optimal wage. Increase in labour will cause wages to fall, but the unemployment rate can be reduced. An increase in the firm’s monopoly power will shift the labour demand curve downward, which will reduce the number of workers that firm is willing to hire for any given bargained wage.
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