Wiguna Rahman
UPT Balai Konservasi Tumbuhan Kebun Raya Cibodas, Lembaga Ilmu Pengetahuan Indonesia

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Flowering and Fruiting Phenology of Rubus spp. in Cibodas Botanical Garden, Indonesia Surya, Muhammad Imam; Rahman, Wiguna
AGRIVITA, Journal of Agricultural Science Vol 34, No 2 (2012)
Publisher : Faculty of Agriculture University of Brawijaya and Indonesian Agronomic Assossiation

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Abstract

Flowering and fruiting phenology were studied in five species of Rubus spp (Rubus ellipticus, Rubus fraxinifolius, Rubus lineatus, Rubus moluccanus, and Rubus pyrifolius) which collected in Cibodas Botanical Garden.  It has occurred since April 2009 to March 2010.  Flowers and flower buds was produced every month by Rubus spp., but they produced difference amount.  Furthermore, number of fruits was also shown a different in each species.  This results show that each species has a different response to environment.
Rhododendron javanicum (Blume) Benn. AND Rhododendron sessilifolium J.J. Sm. GERMINATION AND SEEDLINGS DEVELOPMENT ON DIFFERENT GROWING MEDIA AND FERTILIZERS APPLICATION Rahman, Wiguna; Juairiah, Lina
Buletin Kebun Raya Vol 16, No 2 (2013): Buletin Kebun Raya Vol. 16 (2) Juli 2013
Publisher : Center for Plant Conservation Bogor Botanic Garden, Indonesian Institute of Sciences

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Abstract

Growing medium is one of the most important factor for ex situ conservation of Rhododendron. Study on different growing media available locally were conducted for germinating and developing the seedlings of Rhododendron javanicum and R. sessilifolium. Tree fern roots medium was suitable for germination and developing Rhododendron javanicum and R. sessilifolium seedlings. Growing medium for bigger seedlings using "Cibodas compost" was better than "Cibodas compost and rice husk" for the development of Rhododendron seedlings. Fertilizer application did not showed significant effect on R. sessilifolium seedlings. However, low concentration of fertilizer was recommended rather than high concentration of fertilizer. Some fertilizers at different applications were tested on the development of R. sessilifolium seedlings.
TYPES OF DICHOGAMY, BREEDING SYSTEMS AND POLLEN LIMITATION ON Aeschynanthus pulcher (Blume) G.Don. (GESNERIACEAE) Rahman, Wiguna
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

Observasi tentang tipe dikogami, sistem penyerbukan, dan keterbatasan serbuk sari telah dilakukan pada populasi Aeschynanthus pulcher di Kebun Raya Cibodas. Pengamatan fenologi bunga dilakukan untuk menentukan tipe dikogami. Dalam rangka menentukan sistem perkawinan dan keterbatasan serbuk sari, lima perlakuan penyerbukan telah dilakukan yaitu penyerbukan bebas sebagai kontrol, penyerbukan silang, penyerbukan sendiri, autogami, dan agamospermi. Hasil pengamatan menunjukkan bahwa dikogami pada A. pulcher adalah protandri, tidak sempurna dan durasi tampilan serbuk sari dan stigma reseptif masing-masing yaitu 3-9 hari dan 6-12 hari. A. pulcher merupakan tumbuhan yang dapat membuahi sendiri, sedangkan proses autogami dan agamospermi tidak terjadi. Sindrom keterbatasan serbuk sari pada populasi A. pulcher yang diamati diindikasikan terjadi. Derajat keterbatasan serbuk sari pada A. pulcher mencapai 0.79-0.80. Tiga faktor yang dapat menyebabkan keterbatasan serbuk sari adalah (1) kompetisi antar jenis tumbuhan yang berbunga bersamaan, (2) perilaku berbunga dalam satu periode yang sama, dan (3) kompetisi antara polinator dan pencuri nektar.
KURANG DATA, STATUS TAKSONOMI DAN HIBRID ALAMI DALAM KONSERVASI Rhododendron spp. DI INDONESIA Rahman, Wiguna
Buletin Kebun Raya Vol 11, No 2 (2008): Buletin Kebun Raya Vol. 11 (2) Juli 2008
Publisher : Center for Plant Conservation Bogor Botanic Garden, Indonesian Institute of Sciences

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Abstract

Red listing is a critical point in implementing conservation strategy of Indonesian Rhododendron spp. Some problems might be encountered during the process. Firstly, many of Indonesian Rhododendron species are on data deficient status, especially for non-Java species. Secondly, the existence of unstable species list that contains species names only known from few specimens. Thirdly, the legality of the conservation status for natural hybrids. Thus, promoting their natural habitat conservation and make them as monitoring remote areas for botanic gardens would be an important part of the conservation strategy.
The Effects of NPK fertilizer, Manure and Vesicular Arbuscular Mycorrhiza (VAM) on the Growth, Biomass and Artemisinin Content of Artemisia annua L. Rahman, Wiguna; Widyatmoko, Didik; Lelono, Arthur A.
JURNAL BIOLOGI INDONESIA Vol 10, No 2 (2014): Jurnal Biologi Indonesia
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (257.569 KB) | DOI: 10.14203/jbi.v10i2.2107

Abstract

Most artemisinin is extracted from an annual herb Artemisia annua L. but the cultivation in Indonesia is limited bythe low yield of the artemisin incontent that is not economically beneficial to industry. Improvement on cultivatedvarieties and cultivation techniques is therefore needed. This work aims to improve the cultivation techniques byevaluating the application effects of NPK, manure, and VAM on the artemisinin yield of A. annua. The experimentwas set using a Split Split Plot Design involving three factors. First factor was the application of four dosages ofNPK (0 kg ha-1 as a control; 40:40:40 kg ha-1; 80:80:80 kg ha-1; and 120:120:120 kg ha-1). Second factor wasmanure addition (using 0 ton ha-1 and 150 tons ha-1). Third factor wasthe application of mycorrhiza (0 g plant-1and15 g plant-1). The experiment was divided into three different groups based on the seed sources (Bandung, Cibodas,and Tawangmangu plants) using similar treatments. The results showed that the plant growth (Relative GrowthRates/RGR of plant heights and number of branches), leaf yield, and total plant biomass were much affected byNPK. The addition of manure has less significant effect on those parameters. Only VAM seems to influence theartemisinin content. The highest artemisinin yield (5 kg ha-1) was relatively low when compared to the productionin USA, China, and Brazil. However the result shows that a low fertilizer input of 40:40:40 kg NPK ha-1 and aninoculation of VAM were recommended for cultivating A. annua resulting a significantly high yield of artemisinin.Keywords: Artemisia annua L., Artemisinin content, NPK, Manure, VAM, Plant Growth, Biomass
KURANG DATA, STATUS TAKSONOMI DAN HIBRID ALAMI DALAM KONSERVASI Rhododendron spp. DI INDONESIA Rahman, Wiguna
Buletin Kebun Raya Vol 11, No 2 (2008): Buletin Kebun Raya Indonesia Vol. 11 (2) July 2008
Publisher : Center for Plant Conservation Bogor Botanic Garden, Indonesian Institute of Sciences

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Abstract

Red listing is a critical point in implementing conservation strategy of Indonesian Rhododendron spp. Some problems might be encountered during the process. Firstly, many of Indonesian Rhododendron species are on data deficient status, especially for non-Java species. Secondly, the existence of unstable species list that contains species names only known from few specimens. Thirdly, the legality of the conservation status for natural hybrids. Thus, promoting their natural habitat conservation and make them as monitoring remote areas for botanic gardens would be an important part of the conservation strategy.
Rhododendron javanicum (Blume) Benn. AND Rhododendron sessilifolium J.J. Sm. GERMINATION AND SEEDLINGS DEVELOPMENT ON DIFFERENT GROWING MEDIA AND FERTILIZERS APPLICATION Rahman, Wiguna; Juairiah, Lina
Buletin Kebun Raya Vol 16, No 2 (2013): Buletin Kebun Raya Vol. 16 (2) July 2013
Publisher : Center for Plant Conservation Bogor Botanic Garden, Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Growing medium is one of the most important factor for ex situ conservation of Rhododendron. Study on different growing media available locally were conducted for germinating and developing the seedlings of Rhododendron javanicum and R. sessilifolium. Tree fern roots medium was suitable for germination and developing Rhododendron javanicum and R. sessilifolium seedlings. Growing medium for bigger seedlings using "Cibodas compost" was better than "Cibodas compost and rice husk" for the development of Rhododendron seedlings. Fertilizer application did not showed significant effect on R. sessilifolium seedlings. However, low concentration of fertilizer was recommended rather than high concentration of fertilizer. Some fertilizers at different applications were tested on the development of R. sessilifolium seedlings.
TYPES OF DICHOGAMY, BREEDING SYSTEMS AND POLLEN LIMITATION ON Aeschynanthus pulcher (Blume) G.Don. (GESNERIACEAE) Rahman, Wiguna
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

Observasi tentang tipe dikogami, sistem penyerbukan, dan keterbatasan serbuk sari telah dilakukan pada populasi Aeschynanthus pulcher di Kebun Raya Cibodas. Pengamatan fenologi bunga dilakukan untuk menentukan tipe dikogami. Dalam rangka menentukan sistem perkawinan dan keterbatasan serbuk sari, lima perlakuan penyerbukan telah dilakukan yaitu penyerbukan bebas sebagai kontrol, penyerbukan silang, penyerbukan sendiri, autogami, dan agamospermi. Hasil pengamatan menunjukkan bahwa dikogami pada A. pulcher adalah protandri, tidak sempurna dan durasi tampilan serbuk sari dan stigma reseptif masing-masing yaitu 3-9 hari dan 6-12 hari. A. pulcher merupakan tumbuhan yang dapat membuahi sendiri, sedangkan proses autogami dan agamospermi tidak terjadi. Sindrom keterbatasan serbuk sari pada populasi A. pulcher yang diamati diindikasikan terjadi. Derajat keterbatasan serbuk sari pada A. pulcher mencapai 0.79-0.80. Tiga faktor yang dapat menyebabkan keterbatasan serbuk sari adalah (1) kompetisi antar jenis tumbuhan yang berbunga bersamaan, (2) perilaku berbunga dalam satu periode yang sama, dan (3) kompetisi antara polinator dan pencuri nektar.
KRITERIA PENENTUAN SPESIES PRIORITAS Rhododendron spp. TERANCAM KEPUNAHAN UNTUK DIKONSERVASI SECARA EX SITU DI INDONESIA Rahman, Wiguna
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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Abstract

Proses pencapaian tujuan konservasi selalu dibatasi oleh berbagai hal, seperti waktu, dana, SDM, maupun kebijakan. Hal ini terjadi juga pada usaha konservasi tumbuhan secara ex situ. Proses menentukan jenis tumbuhan dan lokasi pengoleksian yang tepat selalu menjadi permasalahan yang dihadapi sebelum kegiatan pengoleksian dilaksanakan. Hal ini karena penentuan keputusan perlu mempertimbangkan berbagai hal seperti status konservasi, ketersediaan dana, ketersediaan informasi, waktu,  dan resiko keberhasilan tumbuh. Dalam tulisan ini akan dijelaskan kerangka pengambilan keputusan untuk  menentukan prioritas spesies tumbuhan yang akan dijadikan koleksi ex situ. Tiga puluh spesies Rhododendron asli Indonesia yang terancam punah digunakan sebagai contoh. Metode yang digunakan adalah skoring terhadap 11 kriteria. Kriteria tersebut mencakup status spesies (meliputi: status konservasi, status keberhasilan introduksi ex situ, representasi kelompok taksa unik); status lokasi (status dalam area Biodiversity Hotspot dan Global 200 ecoregion, serta perlindungan legal habitat); kemudahan propagasi (meliputi: bentuk hidup, ketinggian habitat, dan jarak antara lokasi dan lembaga ex situ); efektivitas (jumlah spesies kongenerik simpatrik yang terancam kepunahan); dan biaya pengoleksian. Interpretasi hasil skoring dilakukan dengan sistem peringkat. Berdasarkan hasil penilaian terhada jenis Rhododendron Indonesia, maka yang menempati peringkat teratas untuk diprioritaskan dikoleksi di Kebun Raya Cibodas adalah R. longiflorum var. bancanum, R. wilhelminae, dan R. album.
Pertumbuhan dan Alokasi Biomassa pada Tanaman Artemisia annua L. Rahman, Wiguna; Widyatmoko, Didik
JURNAL BIOLOGI INDONESIA Vol 11, No 1 (2015): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3501.742 KB) | DOI: 10.14203/jbi.v11i1.2159

Abstract

Artemisia annua L. is known as one of the plants producing artemisinin, i.e. active compound that is used for anti-malaria theraphy. This plant has potency to be cultivated in Indonesia through seedlings and cuttings. The objective of  this study was to compare growth and biomass allocation of plants from seedlings and cuttings. The experiment was set using  Completely Randomize Design with one factor. The factor is type of plant propagation which cutted plant derived from three different ages of mother plants (1.5, 2, and 2.5 months after planting) and seedlings as control. The result showed that growth and biomass alleviation of the cuttings plants are more rapid than the seedlings. However, the cutting plants were flowering earlier than the seedling. At three months after planted, more than 70% of the cutting plants population have flowered. It is implied that the plants from cutting will loss about 70% of its yield potency than the seedling. On the other hand, there was no significant effects of the ages of mother plants on growth and biomass of the cutted plant (p>0.05). Therefore, seedlings were more effective than cutted plant on A. annua cultivation. Keywords: artemisia annua L., biomass allocation, cuttings, growth, seedlings.