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Annisa Satyanti
Hortus Botanicus Bogoriensis
Agriculture, Biological Sciences & Forestry

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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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Abstract

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 8°C whereas P. spicessens habitat temperature ranged from 19°C early in the morning up to 26°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. 13–26°C (Cibodas Botanic Gardens). With a cold stratification at 6–8°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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Abstract

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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Abstract

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.
Co-Authors A.A. Ketut Agung Cahyawan W Eko Susanto Elise Knecht, Elise Evi W. Saragih Farid Kuswantoro, Farid Harun Al-Rasjid Izu Andry Fijridiyanto Marieke Euwe, Marieke Mimin Mimin Nuria Simon Cid, Nuria Simon Paul Egan, Paul Trisno Utomo