Amorphophallus titanum Becc. (Araceae), is known by titan arum (western) or bunga bangkai (Indonesian), is the bulkiest inflorescence in the world. The species is valued for its unique character of their inflorescence. The species has been overexploited and is considered as vulnerable plant species. The present study is carried out to assess genetic diversity and to estimate genetic relationship among 22 accessions collected from two different populations in Sumatra using Random Amplified Polymorphic DNA (RAPD). Nine RAPD primers generated 143 scorable bands which 137 (95.84%) of them were polymorphic. Clustering analysis was performed based on RAPD profiles using the UPGMA method. The range of genetic dissimilarity value among accessions was from 0.14 to 0.59, while the range of genetic dissimilarity among populations was from 0.67 and 0.77. These values showed that A. titanum from Sumatra were more genetically diverse among genotypes than that of among populations.
Amorphophallus discophorus Backer & Alderw. is one of the Javan endemic aroid species. This species is locally endemic to the slopes of Mount Wilis in Kediri Regency (East Java) at elevations between 600-1300 m. Poorly known species like A. discophorus could easily become extinct if not distinguished from other species, such as A. muelleri, that are used for commercial purposes. The conversion of natural forests for agriculture over the last decade has resulted in a loss of suitable habitat for this species. Several field trips undertaken to locate natural populations of this species have proved unsuccessful. Based on these field exercises, A. discophorus is regarded as presumed extinct in the wild.
Yuzammi. 2018. The diversity of aroids (Araceae) in Bogor Botanic Gardens, Indonesia: Collection, conservation and utilization. Biodiversitas 19: 140-152. Bogor Botanic Gardens is an ex-situ conservation centre, covering an area of 87 ha, with 12,376 plant specimens, collected from Indonesia and other tropical countries throughout the world. One of the richest collections in the Gardens comprises members of the aroid family (Araceae). The aroids are planted in several garden beds as well as in the nursery. They have been collected from the time of the Dutch era until now. These collections were obtained from botanical explorations throughout the forests of Indonesia and through seed exchange with botanic gardens around the world. Several of the Bogor aroid collections represent ‘living types’, such as Scindapsus splendidus Alderw., Scindapsus mamilliferus Alderw. and Epipremnum falcifolium Engl. These have survived in the garden from the time of their collection up until the present day. There are many aroid collections in the Gardens that have potentialities not widely recognised. The aim of this study is to reveal the diversity of aroids species in the Bogor Botanic Gardens, their scientific value, their conservation status, and their potential as ornamental plants, medicinal plants and food. The methods of the research include direct observation in the garden and nursery collections, analysis of the Gardens’ long-term registration database, as well as herbarium studies in both the Herbarium Bogoriense and the Gardens’own herbarium. A total of 130 species of aroids belonging to 36 genera have been cultivated in the Bogor Botanic Gardens. It is estimated that the gardens has 29% of the total number of genera in the world (21 genera are native to Indonesia). The aroid collection consists of terrestrial plants, aquatic plants and climbing plants (61 species, 12 species and 57 species, respectively). Amorphophallus paeoniifolius has developed further as a food plant. Genera such as Aglaonema, Alocasia, Apoballis, Rhaphidophora and Scindapsus have long been used as ornamental plants. Futhermore, some Homalomena species can be extracted for essential oils, while Epipremnum pinnatum has application in the treatment of cancer. Descriptions of some endemic, rare and high value species are discussed in this paper.
Amorphophallus ardii is described and illustrated, and compared to other Indonesian Amorphophallus species. The species was collected in the Matarombeo limestone mountain range in Southeast Sulawesi, Indonesia. The species is restricted to karst areas and endemic to Southeast Sulawesi.
Abstract. Munawaroh E, Yuzammi, Purwanto Y. 2020. The Euphorbiaceae (Spurge Family) in Bogor Botanic Gardens, Indonesia: Diversity, conservation and utilization. Biodiversitas 21: 5021-5031. Euphorbiaceae (Spurge family) is the fourth largest family world-wide, consists of 1,354 species and 91 genera. The family is also a part of the Bogor Botanic Gardens collections. The Gardens has evolved to fulfill its mission through five principal functions: conservation, research, education, tourism, and environmental services. The aims of this study are to reveal the diversity, conservation, and its potential in the Bogor Botanic Gardens. This research was based on direct observation of all members of Euphorbiaceae family in the Gardens, as well as Registration Unit and the Garden’s catalog which were observed for more than 10 years. The Gardens collected 39 genera, 71 species, and 136 specimens where 91 specimens are trees, 38 specimens are shrubs, three specimens are climbers and four specimens are succulents. Most of the collections are native to Indonesia 75.91% (103 specimens) and only 33 specimens (24.09%) from overseas. Amongst native collections have dominated from Jawa 25.54% (34 specimens), Sumatra 24.08% (33 specimens). The others are from Sulawesi 9.48% (13 specimens), Kalimantan 7.29% (10 specimens), Maluku 6.56% (9 specimens), Papua 2.28% (three specimens), and Nusa Tenggara Timur 0.72% (one specimen). Many species of the family have potentially developed as traditional medicinal plants (11 species), ornamental plants (16 species), spices and vegetable (two species), timbers (14 species), rubber plants (one species), source of energy (two species) and toxic (six species). Several old collections have retained at the Gardens that aged over 75 years, such as Mallotus philippensis (Lam.) Mull. Arg. forma mollis, Acalypha wilkesiana Mull. Arg., Acalypha hispida Burm. var. sanderi (N.E.Br.) J. J. Sm., Acalypha wilkesiana Mull. Arg. forma Montana, Sapium aucuparium Jacq. and Ricinodendron heudelotii (Bail.) Heckel. A map of planting point of the Euphorbiaceae collections is provided.
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