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ArticleThe utilization of rosewood (Dalbergia latifolia Roxb.) by local community in Indonesia has opened a Pandora’s box for the fate of its conservation status
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Dalbergia latifolia Roxb. is one species of the family Papilionaceae. It is also known as Indian rosewood, East Indian rosewood, Bombay Black wood, Palissaneder de I’Inde or d’Asie (France), or Sonokeling (Indonesia). In Indonesia, Sonokeling is often used for high-class furniture raw materials such as bookshelves, cabinets, decorative wood, wood carving and instruments cases. People also use it as shade tree, especially in agroforestry systems and government use Sonokeling for reforestation. Indonesia exports plenty of raw materials for musical instruments, sports equipment, and plywood products. The biggest source of timber trading for this species to date has been obtained from state owned concession or from community land, not from the wild. Some argues that Sonokeling has becoming rare but some claims otherwise. In 2016, D. latifolia Roxb. was included in the CITES Appendix II list. This may affect trading regulation in Indonesia despite the fact that Sonokeling is widely spread in Java island and easy to grow. This study was carried out to open the Pandora’s box of its conservation status that so far based on limited information from their distribution elsewhere. The results revealed a massive density and its distribution in the place where it is first planted. In West Java, growth increment can reach 4-7 cm/year. However, there was a difference in heartwood size between Sonokeling growing in plantation area with those in community’s land. Survey showed of farmers’ less interest to grow Sonokeling intensively and indication of some illegal cutting from plantation area. So far, treatment to enlarge tree diameter is through thinning. While technology to enlarge heartwood remains unknown. The information generated from this study could be used as piece of evidence to further investigate the growth, distribution and to prevent illegal harvesting of Sonokeling in Indonesia. This will possibly help to delisting Sonokeling from CITES Appendix II. Keywords: sonokeling, reforestation, plantation, conservation, CITES, plywood, trading ID: 3486310 -
DocumentHigh-frequency regeneration of plants in vitro from seedling-derived apical bud explants in Tilia mandshurica
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Tilia species have taken hold as a crop of interest for both the honey and timber industries, underscoring a need for the development of efficient methods for large-scale propagation. In Tilia species such as T. mandshurica, propagation through seeds is difficult because of a low germination rate (approximately 10-16%) and an extremely hard seed coating that can delay germination for up to two years. Further, cutting propagation is not efficient due to the resulting poor development of root systems. To overcome these difficulties, in vitro culture techniques for plant regeneration have become attractive methods for the propagation of plants. Generally, plant regeneration systems based on apical and axillary bud culture are the most effective method of in vitro propagation
This work was to develop an efficient method for shoot induction and plant regeneration of seedling-derived apical bud explant in Tilia mandshurica. The highest rate (82.2%) of shoot induction was obtained when apical bud explants from juvenile seedlings (5 months old) were cultured on MS medium containing 1.0 mg/L BAP. However, apical bud explants obtained from mature trees (12 years old) did not produce any shoots, even with BAP supplementation. Among the three cytokinins tested for shoot multiplication (BAP, zeatin, and kinetin), BAP was the most effective; the highest number of shoots per explant (2.1) was observed on MS medium supplemented with 1.0 mg/L BAP. For rooting of in vitro-elongated shoots, the highest rooting rate (100%) was observed in half-strength MS medium supplemented with 0.5-1.0 mg/L IBA or 3.0 mg/L NAA. In the acclimatization process, plantlets that were rooted on the IBA (0.5 mg/L)-supplemented medium had the highest survival rate (100%) or root length (18.5 cm). This work showed that a low concentration (0.5 mg/L) of IBA is appropriate for rooting. Keywords: Biodiversity conservation ID: 3622528 -
DocumentVariability in the early growth of Parkia timoriana (DC.) Merr. from Mount Makiling Forest Reserve, Luzon, Philippines and its applications in conservation and forest restoration
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.This study evaluated the early growth performance of selected mother trees of Parkia timoriana (Fabaceae) and characterized the suitable environmental (soil and light) factors for the growth of the species. P. timoriana seedlings from different mother trees from the Mount Makiling Forest Reserve (MMFR), Luzon, Philippines were grown in two soil media under greenhouse condition and field trial planted in the University of the Philippines Laguna-Quezon Land Grant (LQLG), where P. timoriana is not occurring naturally and soil and climate differ significantly with the MMFR. Early growth performances in height and ground basal diameter (GBD) or root collar diameter (RCD) both in the greenhouse and field trial plot were measured. Nursery-based performance showed that the average RCD was generally higher in MMFR than LQLG soil but the overall difference was not statistically significant. In contrast, overall average height was consistently higher in LQLG than in MMFR soil, but similar to RCD the difference was not statistically significant. Under different light conditions in the field trial, there was significant difference in mortality, tree height, and GBD. The differences in both the height and GBD may be attributed to the genotype of the mother trees, but height can additionally be attributed to the interaction of the genotype and the different light conditions. Results suggest that P. timoriana can be grown in areas of different soil condition, but it requires partial shade in order to achieve its full growth potential during the early stage of its growth. Hence, P. timoriana when used in reforestation or tree planting projects must consider differences in the early growth response of seedlings according to its genotype as well as light conditions. However, it is highly suggested that growth performances among provenances of P. timoriana and other environmental variables that may affect growth of the species should be looked into. Keywords: Biodiversity conservation, Genetic resources, Sustainable forest management, Deforestation and forest degradation, Monitoring and data collection ID: 3486623
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