Seed characteristics and seed germination behaviour of Hoya parasitica Wall. (Asclepiadaceae) were observed to study the potentials of the seed for propagation and genetic conservation of the species. Seeds were collected from follicles produced by Hoya collection of Bogor Botanical Gardens. They are small, thin, plumed and showing a comose type. The weight of 100 seeds was 0.7 â€” 0.9 gram and the water content was 26 â€” 30% at the time of fruit opening. The water content decreased rapidly to 12.7% and 21.4% after one day of storage in a desiccator containing silica gel and in the open air, respectively. This is in accordance with the natural behaviour of the seed that is dispersed mainly by wind. In general, the seeds were easy to germinate (up to 99% total germination), both in the dark and under natural light, and there was no substantial dormancy encountered during seed germination. The seeds were able to germinate up to 60% while the water content was 3.8%, suggesting the possibilities of long-term storage of the seed for plant genetic resources conservation.
Baskin, C.C. and J.M. Baskin. 2001. Seeds: Ecology, Biogeography, and Evolution of Dormancy and Germination. Academic Press, California. 666 pp.
Baskin, J.M. and C.C. Baskin. 2004. A classification system for seed dormancy. Seed Science Research 14:1.16. 10.1079/SSR2003150
Bewley, J.D. and M. Black. 1994. Seeds: Physiology of Development and Germination. 2nd ed. Plenum Press, New York.
Budowski, G.1975. The global problems of conservation and the potential role of living collections. In Simmons, J.B., R.I. Beyer, P.E. Brandham, G.L.I. Lucas and V.T.H. Parry (eds.) Conservation of Threatened Plants. Plenum Press, New York.
Bullock, J.M. 2000. Gaps and seedling colonization. In Fenner, M. (ed.) The Ecology of Regeneration in Plant Communities. CABI Publishing, UK.
Constantin, J. 1912. Asclepiadacees. In Lecomte, H. and H. Humbert (eds.) Flare Generale de L'lndo-chine. Masson et Ce Paris. Hal: 125.141.
Copeland, L.D. and M.B. McDonald. 1995. Principles of Seed Science and Technology. 3rd ed. Chapman & Hall, New York.
Crawley, MI 2000. Seed predators and plant population dynamics. In Fenner, M. (ed.) The Ecology of Regeneration in Plant Communities. CABI Publishing, UK.
Cromarty, A.S., R.H. Ellis and E.H. Roberts. 1982. The Design of Seed Storage Facilities for Genetic Conservation. IBPGR, Roma.
Ellis, R.H. 1991. The longevity of seeds. Hort.Sci. 26: 1119-1125. hortsci.ashspublications.org/content/26/9/1119.full.pdf
Given, D.R. 1994. Principles and Practices of Plant Conservation. Timber Press, Portland,Oregon.
Goyder, D. 1990. Hoya multiflora Blume. Kew Bulletin 7:3-6
Hooker, D.J. 1885. The Flora of British India Vol. IV. L. Reeve & Co., London. Hal: 52-62
ISTA (International Seed Testing Association). 1992. Determination of moisture content. Seed Sci.Tech. 13: 338-341.
Katajima, K. and M. Fenner. 2000. Ecology of seedling regeneration. In Fenner, M. (ed.) The Ecology of Regeneration in Plant Communities. CABI Publishing, UK.
Kleijn, D. and R. van Donkelaar. 2001. Notes on the taxonomy and ecology of the genus Hoya (Asclepiadaceae) in Central Sulawesi. Blumea 41: 457-483
Leishman, M.R., I.J. Wright, A.T. Moles & M. Westoby. 2000. The evolutionary ecology of seed size. In Fenner, M. (ed.) The Ecology of Regeneration in Plant Communities. CABI Publishing, UK.
Muller-Landau, N.C., S.J. Wright, O. Calderon, S.P. Hubbell and R.B. Foster. 2002. Assesssing recruitment limitation: concepts, methodes and case-studies from a tropical forest. In Levey, D.J., R.S. Silva and Galetti, M. (eds.) Seed Dispersal and Frugivory: Ecology, Evolution and Conservation. CABI Publishing, UK.
Rahayu, S. 2001. Keanekaragaman genetik Hoyo asal Sumatra. Tests S2, Program Pasca Sarjana Institut Pertanian Bogor.
Rintz, R.E. 1978. The Malay Peninsula species of Hoya (Asclepiadaceae). Malay. Nat. J. 30: 467-522
Roberts, E.H. 1972. Storage Environment and the Control of Viability. In: Roberts, E.H. (ed.) Viability of Seeds. Chapman & Hall, New York.
Roberts, E.H. 1991. Genetic conservation in seed banks. Biol. J. Linn. Soc. 43: 23-29. 10.1111/j.1095-8312.1991.tb00580.x
Schmidt, L 2000. Guide to Handling of Tropical and Subtropical Forest Seed. Danida Forest Seed Centre, Denmark.
Stushnoff, C. 1991. Cryopreservation of fruit crop genetic resources - Implication for maintenance and diversity during conservation. Hort.Sci. 26: 518-522.
Thaitong, O. 1996. The genus Hoya in Thailand. In Kiew, R. (ed) The Taxonomy and phytochemistry of the Asclepiadaceae in Tropical Asia. Univ. Pertanian Malaysia. Hal: 83-64.
Wilson, M.F. and A. Traveset. 2000. The ecology of seed dispersal. In Fenner, M. (ed.) The Ecology of Regeneration in Plant Communities. CABI Publishing, UK.
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