Judul: Keanekaragaman Fungi Ektomikoriza di Hutan Penelitian Meranti Gunung Dahu Leuwiliang, Kabupaten Bogor
Abstrak: Shorea merupakan salah satu marga suku Dipterocarpaceae yang mampu berasosiasi dengan fungi ektomikoriza. Tujuan penelitian ini adalah mengidentifikasi dan menduga keanekaragaman fungi ektomikoriza di Hutan Penelitian Meranti Gunung Dahu. Pengambilan fungi ektomikoriza dilakukan dengan metode eksplorasi pada tegakan Shorea leprosula dan Shorea selanica dengan jarak tanam 2 m x 2 m, 3 m x 3 m dan 4 m x 4 m. Hasil penelitian menunjukkan bahwa telah ditemukan 9 jenis dari 5 suku fungi ektomikoriza yaitu Amanita sp. (Amanitaceae), Boletus sp1, Boletus sp2, Boletus sp3 (Boletaceae), Laccaria sp. (Hydnangiaceae), Russula sp1, Russula sp2, Russula sp3 (Russulaceae), dan Scleroderma sp. (Sclerodermataceae). Semakin lebar jarak tanam maka jumlah individu fungi ektomikoriza yang ditemukan semakin banyak. Jenis fungi ektomikoriza yang hanya ditemukan pada tegakan S. leprosula adalah Scleroderma sp., sedangkan jenis fungi ektomikoriza yang hanya ditemukan pada tegakan S. selanica adalah Amanita sp., Laccaria sp. and Boletus sp2. Indeks keanekaragaman jenis fungi ektomikoriza tergolong sedang, sedangkan indeks kekayaan dan indeks kemerataan jenis fungi ektomikoriza tergolong rendah. Berdasarkan indeks kesamaan komunitas fungi ektomikoriza menunjukkan bahwa terdapat tiga kelompok besar habitat fungi ektomikoriza.
Keyword: ektomikoriza, keanekaragaman, Shorea leprosula, Shorea selanica

Judul: Morphotype diversity and isolation of shorea spp. ectomycorrhizal fungi at KHDTK Haurbentes Research Forest Jasinga, Bogor
Abstrak: Shorea spp. bersimbiosis secara obligat dengan cendawan ektomikoriza. Biologi ektomikoriza Shorea spp. belum banyak dilaporkan sehingga penelitian terhadap struktur kolonisasi ektomikoriza dan isolasi cendawan pada Shorea spp. perlu dilakukan. Penelitian ini bertujuan untuk menganalisis morfotipe dan mengisolasi cendawan ektomikoriza pada Shorea spp. di KHDTK Haurbentes Jasinga, Bogor. Hasil analisis morfotipe ektomikoriza dari 45 sampel akar diperoleh 10 morfotipe yakni irregularly pinnate black, irregularly pinnate dark brown, irregularly pinnate light brown, monopodial pinnate dark brown, monopodial pinnate light brown, monopodial pyramide dark brown, monopodial pyramide light brown, unramified-simple black, unramified-simple dark brown dan unramified-simple light brown. Sebanyak 15 isolat berhasil diisolasi dari morfotipe irregularly pinnate dark brown, irregularly pinnate light brown, monopodial pinnate light brown dan unramified-simple light brown. Sebanyak 8 dari 15 isolat yang berhasil diisolasi, diduga sebagai cendawan ektomikoriza karena isolat tersebut tidak bersporulasi, memiliki hifa septat dan beberapa isolat membentuk klamidospora. Kata kunci: Ektomikoriza, Haurbentes, Morfotipe, Shorea spp., Shorea spp. are obligately associated with ectomycorrhizal fungi. Ectomycorrhizas on Shorea spp. have not been extensively studied, especially biological aspects of the symbiosis. The aim of this research was to analyze root morphotype on Shorea spp. and isolate of the ectomycorrhizal fungi at KHDTK Haurbentes Research Forest Jasinga, Bogor. Based on root morphotype analysis from 45 ectomycorrhizal root samples of KHDTK Haurbentes were obtained 10 morphotypes. They were irregularly pinnate black, irregularly pinnate dark brown, irregularly pinnate light brown, monopodial pinnate dark brown, monopodial pinnate light brown, monopodial pyramide dark brown, monopodial pyramide light brown, unramified-simple black, unramified-simple dark brown and unramified-simple light brown. A total of 15 fungal isolates were succesfully obtained from morphotypes such as irregularly pinnate dark brown, irregularly pinnate light brown, monopodial pinnate light brown and unramified-simple light brown. A total of 8 out of 15 isolates might be ectomycorrhizal fungi because they did not sporulated, septate hyphae and sometimes form chlamydospore. Keywords: Ectomycorrhiza, Haurbentes, Root Morphotype, Shorea spp.
Keyword: Ektomikoriza, Haurbentes, Morfotipe, Shorea spp.

Judul: Elektrodeposisi Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) pada Substrat Kaca ITO
Abstrak: Semiconductor Cu2ZnSnS4 (CZTS) thin film that can be used as absorber layers on solar cell module was made via electrodeposition method. CZTS thin film was electrodeposited on the surface of a silicate glass coated with a thin layer of indium tin oxide (ITO). Deposition process was done using potentiostatic mode at room temperature with a potential of 1.05 V for 30, 45, and 60 minutes, followed with annealing the film at 2 different temperatures, 500 ºC using furnace and 180 ºC using hot plate, both treatments for 45 minutes in N2/H2S atmosphere. The X-ray difractograms were analyzed using Match 2 program and showed that the CZTS thin films had kesterit crystalline structure, with a low percentage of CZTS phase. The thin film also contained secondary phases such as Cu2S, ZnS, and SnS. The obtained CZTS thin films had a thickness between 1.039 and 1.676 μm. Absorption study showed that the band gap energy of CZTS thin films which was annealed using furnace ranged from 1.50 to 1.52 eV, whereas that annealed using the hot plate was not observed. The band gap energy value showed that CZTS thin films can be used as sunlight absorber layers on solar cell. The formation of CZTS crystal film on this investigation was effectively performed using furnace annealing process at a temperature of 500 ºC with deposition time of 45 minutes.
Keyword: Thin film, Electrodeposition, Cu2ZnSnS4