E-Journal Center for Plant Conservation Botanic Gardens-LIPI (Indonesian Institute of Sciences / Lembaga Ilmu Pengetahuan Indonesia)
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STRUKTUR DAN KOMPOSISI HUTAN DI KAWASAN LINDUNG RANTAU BERTUAH, KABUPATEN SIAK, PROVINSI RIAU
Get PDFA study on structure and composition of old secondary forest (OSF), young secondary forest (YSF), and old scrub forest (OScF) in Rantau Bertuah Protected Area, Siak Regency, Riau Province, was conducted in September 2018. The purpose of this study was to analyze species composition and structure of forests.The research plot measuring 100 x 100 m (one ha) each was made at OSF, YSF, and OScF. The OSF plot held 33 families, 55 species, and 642 trees with a diameter of ? 10 cm; in YSF 31 families, 56 species, and 450 trees; and in OScF 28 families, 52 species, and 235 trees. At the tree level the OSF was dominated by Calophyllum macrocarpum, Shorea sp., and Gironniera nervosa; the YSF by Palaquium amboinense, Shorea macroptera, and Gironniera nervosa; and the OScF by Macaranga hypoleuca, Gironniera nervosa and Lithocarpus gracilis. Based on the main dominant species and full distribution in the plot, the forest is called the Gironniera nervosa-Lithocarpus gracilis association.Penelitian struktur dan komposisi hutan sekunder tua (HST), hutan sekunder muda (HSM), dan hutan belukar tua (HBT) di Kawasan Lindung Rantau Bertuah, Kabupaten Siak, Provinsi Riau dilaksanakan pada bulan September 2018. Penelitian ini bertujuan untuk menganalisis komposisi jenis dan struktur tegakan hutan. Plot penelitian berukuran 100 x 100 m (satu ha) dibuat di HSM, HST dan HBT. Hasil analisis menunjukkan bahwa di plot HST tercatat 33 suku, 55 jenis, dan 642 pohon berdiameter ? 10 cm; di HSM tercatat 31 suku, 56 jenis, dan 450 pohon; dan di HBT 28 suku, 52 jenis, dan 235 pohon. Pada tingkat pohon di HST, hutan didominasi oleh Calophyllum macrocarpum, Shorea sp., dan Gironniera nervosa; di HSM oleh Palaquium amboinense, Shorea macroptera, dan Gironniera nervosa; dan di HBT oleh Macaranga hypoleuca, Gironniera nervosa, dan Lithocarpus gracilis. Berdasarkan jenis dominan utama dan sebaran penuh dalam plot, tipe komunitas ini dinamakan asosiasi Gironniera nervosa-Lithocarpus gracilis
DOSIS LETAL LD20 DAN LD50 SERTA EFEK IRADIASI SINAR GAMMA PADA PROTOKORM Dendrobium discolor Lindl.
Get PDFGamma ray irradiation is one of plant breeding methods for increasing genetic diversity. In previous irradiation research of Dendrobium discolor Lindl. has not determined a dosage of LD20-50 yet, which generated the highest mutant variations. Thus, further research was carried out by increasing irradiation dosage. Research aimed were to determine the effect of irradiation on Dendrobium discolor Lindl. protocorms using lethal doses LD20 and LD 50, and to obtain new potential mutant with specific morphological characters and better plant performance. The dosages of Gamma ray irradiation used 0, 15, 30 and 60 Gray (Gy). A Completely Randomized Design (CRD) with six replicates was applied. The results showed that LD20 and LD50 values were 22,16 and 58,8 Gy. Gamma ray irradiation treatments of 15 Gy and 30 Gy dosages exhibited morphological changes in leaf shapes and more rosette in leaf arrangement. Consequently, these dosages ranged are recommended, particularly for this orchid species. Treatment of 60 Gy dosage caused entire explants died after 13 months irradiation, subsequent to the third subculture (MIV3).Iradiasi sinar gamma merupakan salah satu metode dalam pemuliaan tanaman yang ditujukan untuk peningkatan keragaman genetik. Penelitian terdahulu yang telah dilakukan pada Dendrobium discolor Lindl. belum dapat menentukan dosis LD20-50, yang merupakan kisaran dosis iradiasi yang menghasilkan variasi mutan tertinggi. Oleh karena itu, penelitian lanjutan dilakukan dengan menggunakan kisaran dosis yang lebih tinggi. Penelitian ini bertujuan untuk mengetahui pengaruh iradiasi pada pada protokorm D. discolor dalam kisaran dosis letal LD20 dan LD50 dan dalam rangka mendapatkan mutan baru yang memiliki karakter morfologi yang spesifik serta performa tanaman yang lebih baik. Iradiasi sinar gamma dilakukan dengan menggunakan dosis 0, 15, 30 dan 60 Gray (Gy). Percobaan dilakukan dengan menggunakan rancangan acak lengkap (RAL) dengan 6 ulangan. Hasil analisis menunjukkan nilai LD20 dan LD50 adalah 22,16 Gy dan 58,8 Gy. Perlakuan iradiasi sinar gamma memperlihatkan perubahan morfologi yang terjadi pada bentuk dan susunan daun yang lebih roset pada dosis 15 Gy dan 30 Gy, dosis ini dapat digunakan sebagai kisaran dosis yang disarankan untuk iradiasi protokorm anggrek jenis tersebut. Dosis 60 Gy merupakan dosis tertinggi yang menyebabkan kematian total setelah subkultur ketiga (M1V3) pada 13 bulan setelah iradiasi
PERKEMBANGAN PEMBANGUNAN KEBUN RAYA KENDARI
Get PDFThe Kendari Botanical Garden establishment was encouraged by former President of Indonesia Megawati Soekarnoputri on the commemoration of the National Technology Awakening Day on August 11, 2004. She called the importance of botanical gardens establishment in every province in Indonesia. The City government of Kendari in collaboration with the Research Center for Conservation of Plants and Botanical Gardens, the Indonesian Institute of Sciences initiate the development since 2009. "Ultra-basic Plant Conservation" was choosen as the theme for Kendari Botanical Garden which occupied 96 ha of area. Kendari Botanical Garden was inaugurated on 22nd October 2019. Development of the gardens including plant collection enrichment, infrastructures and the Kendari City Government’s commitment are presented in this paper
Sauromatum horsfieldii Miq. (Araceae): KOLEKSI BARU KEBUN RAYA BOGOR
Get PDFSauromatum and Typhonium are two genera belonging to theAraceae family. These genera have extreme similarities in its morphology. Since the genera were erected by Schott in 1832, they have often been reduced to one genus, i.e. Typhonium, by many taxonomists, only to be separated again by others. This dispute has now been resolved after research on chlorophast and DNA molecular sequences, conducted in 2010 by Cusimano et al. This research demonstrated that the two genera do differ significantly. Therefore, they should be separated taxonomically, as Typhonium and Sauromatum. Soon after the publication of this research, the name Sauromatum horsfieldii was restored, replacing Typhonium horsfieldii which now is reduced to status of a synonym.Sauromatum and Typhonium are two genera belonging to theAraceae family. These genera have extreme similarities in its morphology. Since the genera were erected by Schott in 1832, they have often been reduced to one genus, i.e. Typhonium, by many taxonomists, only to be separated again by others. This dispute has now been resolved after research on chlorophast and DNA molecular sequences, conducted in 2010 by Cusimano et al. This research demonstrated that the two genera do differ significantly. Therefore, they should be separated taxonomically, as Typhonium and Sauromatum. Soon after the publication of this research, the name Sauromatum horsfieldii was restored, replacing Typhonium horsfieldii which now is reduced to status of a synonym
