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MORPHOLOGICAL INVESTIGATION ON COTYLEDONS: REVEALING TRIBES WITHIN BIGNONIACEAE Satyanti, Annisa; Al-Rasjid, Harun; Mimin, Mimin
Buletin Kebun Raya Vol 12, No 2 (2009): Buletin Kebun Raya Vol. 12 (2) Juli 2009
Publisher : Center for Plant Conservation Bogor Botanic Garden, Indonesian Institute of Sciences

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Morfologi kotiledon dari sebelas jenis tumbuhan suku Bignoniaceae diamati sebagai upaya untuk identifikasi lapangan. Kotiledon pada suku Bignoniaceae memiliki karakter unik dan jarang ditemukan pada suku tumbuhan lain. Ujungnya berbelah dua dan berbentuk hati. Karakter unik ini dapat digunakan untuk identifikasi tumbuhan di lapangan, terutama pada fase semai. Sudut kedua parakotiledon, sudut belahan pada ujung para-kotiledon, dan panjang parakotiledon dapat digunakan untuk membedakan tribus dalam suku Bignoniaceae. Namun demikian, penelitian lanjutan yang menggunakan lebih banyak jenis diperlukan untuk menguatkan hasil awal ini.

HIGHLAND SPECIES AND TEMPERATURE REQUIREMENT FOR GERMINATION: A CASE FROM TWO ENDEMIC PAPUAN Pittosporum (PITTOSPORACEAE) SPECIES Satyanti, Annisa; Kuswantoro, Farid; Susanto, Eko; Utomo, Trisno; Mahmudin, Mahmudin; Fijridiyanto, Izu Andry
Buletin Kebun Raya Vol 18, No 1 (2015): Buletin Kebun Raya Vol. 18 (1) January 2015
Publisher : Center for Plant Conservation Bogor Botanic Garden, Indonesian Institute of Sciences

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Climate change, including warming and drying, is currently the biggest challenge for plant regeneration. We conducted two experiments on how temperature affected the germination of Pittosporum pullifolium and P. spicessens, both endemic to Central Papua highlands. P. pullifolium habitat temperature at night could reach 8Â°C whereas P. spicessens habitat temperature ranged from 19Â°C early in the morning up to 26Â°C at midday. The first experiment was to understand the effect of chilling on P. pullifolium germination initiation. Our study showed that P. pullifolium was dependent on cold stratification for its germination. Without cold stratification the germination was absent even though the temperature range of sowing environment is at ca. 13â26Â°C (Cibodas Botanic Gardens). With a cold stratification at 6â8Â°C (constant) for more than a month, germination of P. pullifolium occurred, with better germination rate under a light. Subsequently we carried out extended cold stratification for a month and interestingly, the germination still occurred but now it is better under dark condition. For P. spicessens, the germination at its habitat temperature range (Wamena) and in the warmer environment (Bogor Botanic Gardens), both occurred at more than two weeks after sowing.

MORPHOLOGICAL INVESTIGATION ON COTYLEDONS: REVEALING TRIBES WITHIN BIGNONIACEAE Satyanti, Annisa; Al-Rasjid, Harun; Mimin, Mimin
Buletin Kebun Raya Vol 12, No 2 (2009): Buletin Kebun Raya Indonesia Vol. 12 (2) July 2009
Publisher : Center for Plant Conservation Bogor Botanic Garden, Indonesian Institute of Sciences

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Morfologi kotiledon dari sebelas jenis tumbuhan suku Bignoniaceae diamati sebagai upaya untuk identifikasi lapangan. Kotiledon pada suku Bignoniaceae memiliki karakter unik dan jarang ditemukan pada suku tumbuhan lain. Ujungnya berbelah dua dan berbentuk hati. Karakter unik ini dapat digunakan untuk identifikasi tumbuhan di lapangan, terutama pada fase semai. Sudut kedua parakotiledon, sudut belahan pada ujung para-kotiledon, dan panjang parakotiledon dapat digunakan untuk membedakan tribus dalam suku Bignoniaceae. Namun demikian, penelitian lanjutan yang menggunakan lebih banyak jenis diperlukan untuk menguatkan hasil awal ini.

VEGETATION SYNTAXONOMY AND LAND MANAGEMENT EFFECT ON METHANE AND CARBON DIOXIDE EMISSIONS FROM WETLANDS: A CASE STUDY FROM TIDAL SALT AND BRACKISH MARSH Satyanti, Annisa; Saragih, Evi; Egan, Paul; Cid, Nuria Simon; Knecht, Elise; Euwe, Marieke
Buletin Kebun Raya Vol 17, No 2 (2014): Buletin Kebun Raya Vol. 17 (2) July 2014
Publisher : Center for Plant Conservation Bogor Botanic Garden, Indonesian Institute of Sciences

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Carbon dioxide (CO2) and methane (CH4) emission from wetlands significantly contribute to climate change and global warming. The interaction between among vegetation type, various environmental factors, and management regimes such as grazing and mowing is considered important in the calculation of CO2 and CH4 gas flux for an ecosystem. In this study, vegetation composition, CH4 and CO2 flux, soil characteristics, air temperature and humidity from the brackish marsh and salt marsh wetland ecosystems on Terschelling Island in Northern Holland were measured. We aimed to investigate the relationship between vegetation composition, grazing, and mowing on CH4 and CO2 emission. The abundance and number of plant species were higher in brackish than in salt marsh. Grazing was found to influence species richness, 39 species being found in a grazed site of brackish marsh compared to 31 species in a similar ungrazed site. CO2 fluxes in salt and brackish marsh were found to be similar while CH4 flux in the salt marsh was found to be lower than in the brackish marsh. Within the brackish marsh, a higher methane emission was recorded in the grazed zone. However the overall effect of grazing and mowing was found to be negligible for CH4 flux but is suggested to clearly reduce CO2 flux in both the salt and brackish marsh.

ECOLOGICAL STUDY IN TWO QUARRIED LIMESTONE KARST HILLS IN BOGOR WEST JAVA: VEGETATION STRUCTURE AND FLORISTIC COMPOSITION SATYANTI, ANNISA; CANDRA KUSUMA, YAYAN WAHYU
BIOTROPIA Vol. 17 No. 2 (2010): BIOTROPIA Vol. 17 No. 2 December 2010
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2010.17.2.81

Many species extinctions have probably gone unnoticed on limestone that was destroyed before they could be sampled. Unless biodiversity surveys are intensified, the true magnitude of extinctions will never be ascertained. The objectives of this study were to determine tree species composition of limestone hills in Nyungcung and Ciampea; to determine quantitatively the dominant and less dominant species and to quantify floristic structure of the two limestone hills. Value of richness (Menhinick) and evenness in Nyungcung were 3.28 and 0.826 whilst in Ciampea were 3.29 and 0.823, respectively. In term of diversity (Shannon Wiener), Nyungcung seems to be more diverse than Ciampea as indicated by the higher value of diversity index. Nyungcung has 3.225 of diversity (Shannon Wiener) index while Ciampea has 2.859. The floristic composition of two sites was significantly different and Â mostly comprisedÂ Moraceae, Rubiaceae, and Euphorbiaceae. However, the highest presence of species were Antidesma montanum (Euphorbiaceae) and Chrysophyllum lanceolatum (Sapotaceae), and Pandanus sp. (Pandanaceae) in Nyungcung, whereas in Ciampea, Harpullia arborea (Sapindaceae), Ophiorhhiza canescens (Rubiaceae), and Allophyllus cobbe (Sapindaceae). Macaranga rhizinoides, O. canescens, A. montanum, and Turpinia montana , respectively , gained the highest importance values. Key words: limestone, flora, composition, quarries

THE NATURAL HABITAT OF BEGONIA ON THE ISLAND OF BALI: MICROCLIMATE PREFERENCE IN TWO FOREST SITES IN BEDUGUL Satyanti, Annisa
BIOTROPIA Vol. 19 No. 2 (2012): BIOTROPIA Vol. 19 No. 2 December 2012
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2012.19.2.237

A study on Begoniaâ€™s ecology was conducted in two forest sites, a nature reserve and reboisation forest, respectively, in Bedugul Bali. The objective of the study was to describe Begonia species found in respective forest sites, to gather information on abiotic factors and to find the influences of these abiotic factors to the abundance of Begonia species. Three species were identified as B. multangula, B. baliensis and B. longifolia. There were two form of B. longifolia, white and red. The multivariate analysis (PCA) showed that abiotic factors measured were relatively similar among plots. In addition, no particular abiotic factor, from multivariate analysis, showed specific influence on Begonia species frequency.Â Interestingly, the multivariate analysis also implied that B. latifolia has different microclimate preference between forms (white and red).Â The abundance, refers to the frequency, of all of species in two forests was similar (t-test, p=0.061). Pooling the data from the fourty plots (two forest sites) and white and red forms of B. longifolia together, B. multangula and B. longifolia found were similarly abundant between species (t- test, p=0.460).

Effect of Substrate Moisture Content and Invasive Grass Competition on Native Fig (Ficus fistulosa) Seedling Recruitment in Limestone Quarries Satyanti, Annisa
BIOTROPIA Vol. 22 No. 2 (2015): BIOTROPIA Vol. 22 No. 2 December 2015
Publisher : SEAMEO BIOTROP

This study was conducted to assess the potential use of the native fig (Ficus fistulosa) for rehabilitating degraded habitats in limestone quarry areas. A greenhouse experiment was performed to evaluate the effects of different substrate moisture levels and competition between the native fig (Ficus fistulosa) and the invasive grass Pennisetum polystachyon on the growth and survival of the native fig. Ficus fistulosa was selected as the study species because it exhibited the highest Importance Value Index (IVI) among other fig species recorded in the Ciampea limestone hill. The results showed that substrate moisture levels did not significantly affect fig biomass, and invasive grass biomass was not reduced under drought stress. However, the interaction between substrate moisture levels and competition with the invasive grass significantly reduced overall fig biomass, although it did not affect leaf number or individual plant size. This study suggests that successful quarry rehabilitation efforts should include invasive species management alongside soil treatment interventions.

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