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Linking conservation of forest genetic resources to species restoration in Western Himalayas

XV World Forestry Congress, 2-6 May 2022









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    Effect of desiccation and storage environment on longevity of Ehretia cymosa Thonn. seeds
    XV World Forestry Congress, 2-6 May 2022
    2022
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    Globally, forestry faces challenges in the availability of seeds due to limited knowledge on seed handling of various species. Forestry seeds are constantly being reviewed and classified as either recalcitrant, intermediate, or orthodox based on their storage behavior. It is essential to understand the tree seed storage behavior to maintain seed viability and thus minimize seed losses. There is scanty literature combining factors of seed moisture content (6%, 9%, 12%, 15%, and 20%), seed storage temperature (20oC, 5oC and -20oC), seed storage duration (1, 4, 9 and 12 months), and germination in different sites with varying environmental variables. Ehretia cymosa is important in the Afromontane forestry landscape as a medicinal, rehabilitation, and conservation species. This study conducted desiccation and storage studies and their influence on the viability of E. cymosa seeds. The study sought to determine the optimum conditions for the storage of Ehretia cymosa that maintains viability. This study observed that E. cymosa dried to seed moisture content of 6%, stored for 12 months at 20oC and sown in the laboratory had the highest germination performance (27.6 ± 3.18%) (p<0.05). This confirms that E.cymosa seeds exhibit orthodox storage behavior. The authors recommend longer storage studies (>12months) to determine the actual longevity of the seeds of this species. The significance of these results would be useful for foresters and farmers that would need to use this species for various purposes. Keywords: Biodiversity conservation ID: 3487450
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    Germination characteristics and storage behavior of Codonopsis pilosula Nannf. seeds
    XV World Forestry Congress, 2-6 May 2022
    2022
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    Codonopsis pilosula Nannf. is classified as an endangered species (VU) in Korea. Ex situ conservation through long-term storage of seeds is, in principle, possible for a significant proportion of plants. However, it is not known whether these seeds are orthodox; that is, if they can survive under long-term storage conditions (-20 °C, 40 % relative humidity (RH) or less) without being damaged. We determined the germination characteristics and storage behavior of C. pilosula. The seeds were collected from plants growing at the Baekdudaegan Arboretum on September 17, 2020. Immediately after collection, the equilibrium relative humidity (eRH) of the seeds was measured. To determine the germination characteristics of the seeds, a germination test was conducted at temperatures of 15, 20, and 25 °C (12/12 h) with 100 and 250 ppm GA3. To determine the storage behavior, their moisture content was measured under five conditions: 15 °C and RH at 15, 20, 30, 40, and 50 %, at 250 ppm GA3. Vitality was calculated as the ratio of the number of germinated seeds and the survived seeds of the unsprouted through the TZ test. Viability tests were conducted in the order of X-ray, germination test, and TZ test. The average germination percentage (GP) of untreated seeds was below 11 ± 3 %. The highest GP of seeds following GA3 treatment was 90 ± 0.70 %. The eRH was 45 % after collection. The initial seed viability percentage was 90.3 ± 2 %. The highest viability percentage (VP) was identified at 91 ± 0.25 % in equilibrium with 20 % (eRH) at 15 °C with a moisture content of 3.23 % Fresh weight. The results of our study on the behavior of C. pilosula seeds indicate that orthodox seeds did not reduce in viability even when dried in equilibrium with 20 % RH; thus, these seeds can be kept under long-term storage conditions. Keywords: Biodiversity conservation, Climate change, Agriculture ID: 3622450
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    Preliminary assessment of Philippine threatened plants in the makiling botanic gardens, Philippines: A showcase of the gardens’ ex-situ living collections
    XV World Forestry Congress, 2-6 May 2022
    2022
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    Conservation of threatened plants is a national and global concern. Assessment of Philippine plants listed as threatened was conducted at the Makiling Botanic Gardens (MBG) of the Mount Makiling Forest Reserve ASEAN Heritage Park. Aside from providing venue for instruction and research related to forestry and plant sciences as mandated by Republic Act (RA) No. 3523, MBG also serves as a repository of important native and endemic species. The study aimed to showcase MBG’s ex-situ collections and to provide list and information on the threatened plants including status, their number and location within the area to safeguard these threatened plants and save them from possible extinction. The list of threatened plants is based on the Department of Environment and Natural Resources (DENR) Administrative Order 2017-11 issued on 02 May 2017 pursuant to RA No. 9147, also known as the ‘Wildlife Resources Conservation and Protection Law’. Results of initial inventory showed a total of 7,574 plant individuals distributed in 401 species and 75 families. Of these, only 82 species with 2,052 individuals are in the Philippine threatened plant list: eight species critically endangered (CR), 15 species endangered (EN), 39 vulnerable (VU), and 20 other threatened species (OTS). This represents only 8.3% of the total 984 species in the threatened plant list and is still way below the Global Strategy for Plant Conservation (GSPC) Target 8 of 75%. About 45% of these threatened species are endemic to the Philippines. There is a need therefore to prioritize these species for global conservation and restoration. Long-term programs on conservation and restoration of these threatened plants must be developed to at least improve their conservation status. Meanwhile, the MBG has commenced a project to increase its living collections of threatened species and develop propagation protocols to make these available for recovery and restoration programs. Keywords: biodiversity conservation ID:3623523

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