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Perilaku Tumbuh Kantong Semar (Nepenthes mirabilis Druce) di Habitat Alaminya, Taman Nasional Kutai, Kalimantan Timur
Full text linkNepenthes mirabilis has been widely known as an insectivorous plant species. A study on the growing behaviour of N. mirabilis in Teluk Kaba, Kutai National Park has been carried out. As many as approximately 840 individuals consisting of 307 rosettes and 533 mature plants were found. Variation in tendril’s position was observed in nine rosettes plants and in 22 mature plants. On the other hand, variations in leaf colour appeared in eight individuals. Variations in colour of pitcher and tendril were found in 17 individuals. The natural habitat of N. mirabilis was very specific, and it was also noted that 13 species were assosiated with this plant species. Further result will be discussed in this paper
MORFOLOGI DAN VIABILITAS POLEN PADA DUA SPESIES BELIMBING HUTAN (Averrhoa dolichocarpa dan A. leucopetala)
Full text linkWild starfruit Averrhoa dolichocarpa and A. leucopetala belong to Oxidaceae family. Both of these species are known as wild startfruit. Usage these species as a fruit or medicine are not discover yet. A number of flowers aborted during pre and at anthesis. As a result the flower failed to produce a fruit. The aims of the research were to study the pollen morphology and viability at a day before anthesis (H-1) and at anthesis (H0) stadia by the method of germination in the Brewbaker and Kwack (BK) and 10% sucrose media. The pollen shape of the wild starfruit (A. dolichocarpa and A. leucopetala) is globose with three aperture or tricolpate. Polen with smooth surfaces is A. leucopetala and polen with rogh surfaces is A. dolicocarpha, also included into the group of medium-type pollen. Preliminary study showed that the optimum incubation time of pollen germination test was 16 hours. BK medium showed a better result for germination test instead of 10% sucrose with viability 68.4% and 54.6%, respectively. Pollen viability of wild starfruit at H0 stadia (65.29%) was higher than pollen viability at H-1 stadia (57.68%) except on A. dolichocarpa that grow in the slopes on long filaments in both of BK and 10% sucrose media. Pollen viability of wild starfruit on long filaments were higher than on the short filaments i.e. 62.5% and 60.5%, respectively
FENOFASE BUNGA Sarcotheca macrophylla Blume (Oxalidaceae) DAN INTERAKSINYA DENGAN FAKTOR LINGKUNGAN DI KEBUN RAYA BOGOR
Full text linkSarcotheca macrophylla Blume as known as kerumbai merah is an endemic plant of Borneo belonging to the family Oxalidaceae. Its fruits are edible and the Dayak Kenyah people in West Kutai, East Kalimantan, also use them as shampoo. Taxonomic studies of this species has been reported, however, studies on its flowering phenophases and phenology has never been found in the literature. This study aimed to describe the flowering development phases of S. macrophylla and determine the environmental factors affecting the process. Descriptive observations of the growth phase and environmental factors were carried out in the Bogor Botanic Gardens. The time of floral initiation of S. macrophylla was 30 days. The phase of the single flower small bud took place for 6 days. The phase of large bud occurred in 12 days. The anthesis phase needed 1–2 days. The fruit development took place for 36–40 days. The biotic factor that is thought to influence the flowering process is air temperature. The biotic factor that influenced the fertilization of S. macrophylla was insect visits from the families Hymenoptera, Curculionidae, Mitidae, and CicadellidaeSarcotheca macrophylla Blume Yang dikenal dengan nama kerumbai merah merupakan tumbuhan endemik Borneo anggota suku Oxalidaceae. Buah dari tumbuhan ini dapat dimakan dan masyarakat Dayak Kenyah di Kutai Barat, Kalimantan Timur memanfaatkannya sebagai sampo. Kajian mengenai taksonomi jenis ini telah dilaporkan, namun kajian mengenai fenofase dan fenologi pembungaan belum pernah ditemukan dalam pustaka. Tujuan penelitian ini adalah untuk mendeskripsikan proses pembungaan dan faktor lingkungan yang memengaruhi perkembangan bunga S. macrophylla. Pengamatan deskriptif dari fase perkembangan bunga dan faktor lingkungan yang mempengaruhinya dilakukan di Kebun Raya Bogor. S. macrophylla memiliki waktu inisiasi pembungaan selama 30 hari. Fase kuncup kecil bunga tunggal berlangsung selama 6 hari. Fase kuncup besar terjadi selama 12 hari. Fase antesis memerlukan waktu selama 1–2 hari. Perkembangan buah membutuhkan waktu selama 36–40 hari. Faktor biotik yang diduga berpengaruh pada proses pembungaan adalah suhu udara. Faktor biotik yang mempengaruhi pembuahan S. macrophylla adalah kunjungan serangga dari Hymenoptera, Curculionidae, Mitidae, dan Cicadellidae
Laporan Penelitian Flora Berpotensi Obat di Kawasan Hutan Jati RPH Jati Sari, BKPH Subah, KPH Kendal dan Kawasan Hutan Jati BKPH Margasari, KPH Balapulang Tegal, Jawa Tengah
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The Traditional Use of Mangroves in East Sumba, Indonesia
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STUDI KOMPARATIF PERKEMBANGAN BUAH DUA JENIS BELIMBING HUTAN (Averrhoa dolichocarpa Rugayah & Sunarti dan A. leucopetala Rugayah & Sunarti)
Full text linkPapua star-fruit (Averrhoa dolichocarpa Rugayah & Sunarti) and Gorontalo star fruit (A. leucopetala Rugayah & Sunarti), also known as belimbing hutan, are two wild species belong to the star fruit family (Oxalidaceae). Information about both species are very limited. The aim of this study is to document the fruits process from two wild Averrhoa species: A. dolichocarpa and A. leucopetala, and the impact of their environment such as edaphic factors. Research on the fruit Phenological observations of the two species was conducted through at Bogor Botanic Garden. It was started when the flower at the anthesis phase until the fruit was rippen. Observed factors included morphology and other external factors such as insects or animals. The result showed that differences in fruit development between the two species was the time they took to get their fruit ripen: fruit of A. dolichocarpa riped within 39 days after anthesis, while the fruit of A. leucopetala riped within 42 days after anthesis. The results of measurements of fruit length and weight during fruit formation showed similar patterns of development between the two types of forest starfruit observed. The length and weight measurement during the fruit development showed similar patterns. During the anthesis phase there were several insects visiting the flowers, such as Apis cerana, Amegilla sp., Xylocopa caerulea and Trigona sp. The Bogor Botanic Garden’s environment is still very good for the growth and breeding of both species, indicated by their high fruit production
Sauromatum horsfieldii Miq. (Araceae): KOLEKSI BARU KEBUN RAYA BOGOR
Full text linkSauromatum 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
BIOGEOGRAFI, FENOLOGI, DAN PEMANFAATAN Reinwardtiodendron humile (Hassk.) Mabb. DI INDONESIA
No full textReinwardtiodendron humile (Hassk.) Mabb. is one of the members of the Meliaceae that has potential as a fruit plant. Information related to its distribution, phenology, and utilization is still limited. This study aims to determine the distribution of R. humile in Indonesia, phenology, and its utilization. The research was conducted using methods of direct observation in the field, herbarium, and relevant references, then the collected data was interpreted descriptively. In Indonesia, the species has a wide distribution area, from Sumatra, Java, Kalimantan to Sulawesi. The fruiting and flowering periods occur throughout the year, depending on the location of the growth. Black ants and weaver ants are thought of as visitor animals, as well as pollinators and the seeds dispersal is predicted done by squirrels. Uses of R. humile is done by local people in Sungai Tapa, Jambi as fresh fruit and firewood. The fruit flesh has a sweet taste, so it has the potential to be developed as fresh fruit and processed fruit
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