Buletin Kebun Raya

41-48

Authors: Peter Wyse Jackson

The last twenty to thirty years can be said to constitute a new renaissance botanical gardens around the world. One of the main causes is the growing concern of the world community associated with the issue of loss of biodiversity. In addition, because a greater need to be institutions that take part actively in the field of conservation of plant resources. Community botanical garden world is experiencing rapid development, not only in terms of the number of new botanical garden that is built up but also of the purpose and function. There are currently no less than 2,500 botanical gardens worldwide. To prepare for a global framework for policies, programs and priorities of the botanical garden world in the field of conservation of biodiversity, in 2000 BGCI has published the International Agenda for Botanic Gardens in Conservation, which contained the botanical garden's global mission.

55-60

Authors: Annisa Satyanti, Harun Al-Rasjid, Mimin Mimin

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.

69-77

Authors: Eka Martha Della Rahayu

Malesia is the center of Dipterocarps diversity in the world, with most species found in Indonesia. Sadly, their existence is threatened by illegal logging, extensive exploitation, and habitat conversion. There are 143 Indonesian Dipterocarps categorized as threatened in the IUCN Red List. Bogor Botanic Garden (BBG) is one of the leading institutions focuses on ex situ conservation of plants. Dipterocarps collection in the BBG represents 41.5% of Dipterocarps of Sumatra, 17.0% of Dipterocarps of Kalimantan, 77.8% of Dipterocarps of Java, 66.7% of Dipterocarps of Bali and Nusa Tenggara, 57.1% of Dipterocarps of Sulawesi, 66.7% Dipterocarps of Moluccas, and 8.3% Dipterocarps of Papua. Totally, BBG has only conserved about 37.8% of threatened Indonesian Dipterocarps, still far from the target aimed by the Global Strategy for Plant Conservation (60% conserved). The BBG has initiated genetic resource conservation of Dipterocarps, through seed preservation. Since most Dipterocarps have recalcitrant seeds, conventional storage methods cannot be used. One of the alternative solutions is to cryopreserve the excised embryo or embryonic axes to overcome the limits of conventional storage methods. Collection of threatened and endemic species along with research on embryo culture and cryopreservation should be intensified in the future.