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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 -
DocumentRevisiting leaf microstructural and physical properties for high-efficiency depositional niches of particulate matters
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Current problems and potential solutions to reduce suspended particulate matter (PM) are enormous scientific challenges. Indeed, reducing the vehicle or industrial-driven PM particles still need a guide to discerning an economically viable solution for highly urbanized areas. Therefore, a better understanding of PM capture processes and pathways from both leaf surfaces and waxes would allow for the development of long-term air purification potential and efficiency in the improvement of urban greenspace. Functional traits as biofiltration for airborne PM particle control were calculated using the following species of Aesculus turbinata, Chionanthus retusus, Ginkgo biloba, Liriodendron tulipifera, Magnolia denudata, Styphnolobium japonicum, Taxus cuspidata, Buxus koreana, Euonymus japonicus, and Rhododendron schlippenbachii. Variation in PM adsorption amounts per unit area could be related to the difference in air pollutant concentrations, weather conditions, tree canopy, and adaxial/abaxial leaf surfaces. Leaf micromorphological traits among tree and shrub species were related to PM adsorption; however, the leaf accumulation-PM removal efficiency could be generated through a collaboration of leaf hydrophobic nature and complex surface microstructures such as trichomes. Furthermore, PM retention capacities of leaf surfaces as the main depositional niches for PM particles can be a very important indicator as a valid means to enhance long-term sustainability of context-specific vegetation barriers for urban air pollution abatement. In conclusion, these findings will provide a reference for urban planning and design and can help to develop the improvement of future urban greenspace based on local conditions. Acknowledgments: This study was carried out with the support of ‘A Study on Mechanism and Function Improvement of Plants for Reducing Air Pollutants’ (Grant No. FE0000-2018-01-2020) from National Institute of Forest Science (NIFoS), Republic of Korea. Keywords: Sustainable forest management, Human health and well-being, Adaptive and integrated management, Biodiversity conservation, Climate change ID: 3486769 -
DocumentProduction and fuel properties of wood chips from logging residues by timber harvesting methods
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.This study calculated the productivity and cost of extraction and processing of logging residues by cut-to-length (CTL) and whole-tree (WT) harvesting methods. In addition, the comparative analysis of the characteristics of wood chip fuel to examine whether it was suitable for the fuel conditions of the energy facility. In the harvesting and processing system to produce the wood chips of logging residues the system productivity and cost of the CTL harvesting system were 1.6 Gwt/SMH and 89,865 won/Gwt, respectively. The productivity and cost of the WT harvesting system were 2.9 Gwt/SMH and 72,974 won/Gwt, respectively. The WT harvesting productivity increased 1.3times while harvesting cost decreased by 18.7% compared to the CTL harvesting system. The logging residues of wood chips were not suitable for CTL wood chips based on International Organization for Standardization (ISO 17225-4:2021) and South Korea standard (NIFoS, 2020), but the quality (A2, Second class) was improved through screening operation. The WT-unscreened wood chips conformed to NIFoS standard (second class) and did not conform to ISO but were improved through screening operation (Second class). In addition to the energy facility in plant A, all wood chips except CTL-unscreened wood chips were available through drying processing. The WT-unscreened wood chips were the lowest at 99,408 won/Gwt. Plants B, C, and D had higher moisture content than plant A, so WT-unscreened wood chips without drying processing were the lowest at 57,204 won/Gwt. Therefore, the production of logging residues should improve with operation methods that improve the quality of wood chips required for applying the variable biomass and energy facility. Keywords: Research, Sustainable forest management ID: 3622432
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