Judul: Isolasi Cendawan Mikoriza Arbuskula pada Tanaman Berkayu Asal Pulau Bangka
Abstrak: Arbuscular Mycorrhizal Fungi (AMF) associate with a variety of plants including forest plants. Research on AMF in forestry in Indonesia is limited, especially on woody plants grown in Bangka Island. Therefore, the aim of this research was to isolate and identify AMF associate with woody plants in Bangka Island grown in post mining area. The Soil samples derived from 8 trapping pots of 4 years woody plants from Bangka Island grown in green house were used as spore inoculum source. Spore extraction from the soil used wet sieving and decanting method. Fungal identification carried out based on the method of “Manual for The Identification of VA Mycorrhizal Fungi”, and fungal isolation used pot culture with Pueraria javanica as a host plant. Fungal structures within the root were analyzed after root staining with trypan blue was conducted. There were 18 spore morphotypes observed which belong to 5 types of Acaulospora and 13 types of Glomus. Seven single spore pot cultures were successfully done from species of Acaulospora sp.1, Acaulospora sp.4, Acaulospora sp.5, Glomus sp.2, Glomus sp.3, Glomus sp.6, and Glomus sp.11. AM fungal colonization observed within the root was arum type which consisted of internal hyphae, asbuscules and vesicles.
Keyword: Bogor Agricultural University (IPB), Bangka Island., Glomus, Acaulospora, woody plants, AMF

Judul: Cendawan Mikoriza Arbuskula pada Sawo Duren (Chrysophyllum cainito) di Kampus IPB Darmaga
Abstrak: Arbuscular mycorrhizal fungi (AMF) are soil fungi that symbiosis with the plant roots. Research about AMF on fruit plants are rarely reported. The objectives of this research are to identify AMF spore and to detect the structure of arbuscular mycorrhiza (AM) on star apple. AMF spore was isolated from the star apple rhizosphere soil following the wet sieving and decanting method and centrifugation, and then identified based on shape, color, size, and spore wall ornamentation. The AM structure was observed on colored root using trypan blue. The result of the research showed that AMF was associated with star apple. The structures of AM in the roots of star apple were internal hyphae, coiled hyphae, and vesicles. The percentage of AM infection in the star apple’s root was 12-31 %. The AMF spores found in the star apple rhizosphere were Acaulospora bireticulata, A. scrobiculata, Ambispora cf. fecundisporum, Funneliformis cf. geosporum, Glomus cf. aggregatum, Glomus cf. microaggregatum, Glomus sp. 1, and Glomus sp. 2.
Keyword: Acaulospora, Ambispora, arbuscular mycorrhiza, Chrysophyllum cainito, Funneliformis, Glomus

Judul: Pembuatan Film Tipis Lithium Niobat (LiNbO3) Menggunakan Metode Chemical Solution Deposition (CSD) dengan Variasi Kecepatan Putar (Rpm).
Abstrak: Film tipis merupakan salah satu aspek yang mendapat perhatian sangat besar dalam bidang material, karena film tipis merupakan material menarik yang memiliki sifat optik yang sangat tergantung pada konstanta dielektrik, indeks bias, dan energi gap. Lithium Niobat (LiNbO3 ) dapat digunakan sebagai pelapis pada film tipis karena memiliki sifat piezoelektrik, electrooptical, pyroelectrical dan photorefractive yang sangat baik. Film tipis Lithium Niobat (LiNbO3 ) ditumbuhkan menggunakan metode Chemical Solution Deposition (CSD) dengan variasi kecepatan 3500 rpm, 5000 rpm, 6500 rpm, dan 8000 rpm. Metode ini memiliki keunggulan dapat mengontrol stokiometri film tipis dengan kualitas yang baik, prosedur yang mudah dan membutukan biaya yang relatif murah. Energi band gap yang dihasilkan dari film tipis Lithium Niobat (LiNbO3) berkisar antara rentang 2.1 eV – 2.8 eV dengan indeks bias berada pada rentang 2.18-3.2. Film tipis LiNbO3 memiliki parameter kisi a=b=5.54Ǻ dan c = 16.35 Ǻ. Struktur morfologi film tipis adalah permukaan yang homogen dan ukuran kristal berada pada rentang 0.417 μm – 0.680 μm.
Keyword: film tipis, sifat optik, litium niobat, chemical solution deposition, kecepatan putar