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Dispersal and germination syndromes of tree seeds in a monsoonal forest in northern India

Published online by Cambridge University Press:  22 February 2007

R.C. Thapliyal  and
S.S. Phartyal
R.C. Thapliyal
Affiliation:
Forest Tree Seed Laboratory, DehraDun, -248006, UA, India
S.S. Phartyal*
Affiliation:
Forest Tree Seed Laboratory, DehraDun, -248006, UA, India Division of Genetics and Tree Propagation, Forest Research Institute, DehraDun, -248006, UA, India
*
*Correspondence: E-mail: shyamphartyal@rediffmail.com; shyamphartyal@yahoo.co.in
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Abstract

This paper describes the dispersal–germination characteristics of seeds of 77 native tree species in a seasonal monsoon forest in Uttaranchal state, northern India. Results indicate that 50% of the species dispersed in the hot, dry summer months, 18% during the rainy season, 23% during the cold season and the remainder in late spring. Germination tests on fresh and laboratory-stored seeds revealed a relationship between morphological features of the fruit and both germination percentage and mean germination time (MGT). Highest mean germination (50%) was for dry-dehiscent fruits with winged wind-dispersed seeds, followed by dry-dehiscent fruits with non-winged seeds (38%) and seeds of dry-indehiscent fruits (37%). Lowest germination (29%) was for seeds from fleshy or pulpy fruits. MGT followed the reverse course. Germination data for seeds stored dry in the laboratory during one seeding cycle indicated six patterns of seed germination: (1) average germination percentage of fresh seeds lower than that of stored seeds, indicating an after-ripening requirement; (2) initial high germination percentage followed by low values, indicating a steep to moderate decline in viability following harvest; (3) no germination after 1 or 2 months of seed storage, due to complete loss of viability, indicating short seed longevity; (4) fresh seed germination in some species equalled the average germination value of stored seeds, indicating constant germination for one whole seeding cycle; (5) germination of both fresh and stored seeds remained consistently low throughout the season, indicating a requirement for some kind of pre-treatment or having poor quality of seeds; (6) initial high germination followed by decline and again increase, showing a seasonal rhythm of germination.

Keywords

after-ripeningDoon Valleygermination syndromesIndiamonsoon forestseed dispersal

Information

Type
Research Article
Information
Seed Science Research , Volume 15 , Issue 1 , March 2005 , pp. 29 - 42
Copyright
Copyright © Cambridge University Press 2005

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References

Aiyyar, T.V.V. (1932) The Sholas of Palghat Division. Part II. The Indian Forester 58, 473–486.Google Scholar
Angevine, M.W., Chabot, B.F. (1979) Seed germination syndromes in higher plants. pp. 188–206. in Solbrig, O.T.;, Jain, S.;, Johnson, G.B.;, Raven, P.H. (Eds) Topics in plant population biology. New York Columbia, University Press.Google Scholar
Baskin, C.C., Baskin, J.M. (1998) Seeds: Ecology, biogeography and evolution of dormancy and germination. San Diego, Academic Press.Google Scholar
Baskin, C.C., Chesson, P.L., Baskin, J.M. (1993) Annual seed dormancy cycles in two desert winter annuals. Journal of Ecology 81, 551–556.CrossRefGoogle Scholar
Baskin, J.M., Baskin, C.C. (1972) Physiological ecology of germination of Viola rafinesquii. American Journal of Botany 59, 981–988.CrossRefGoogle Scholar
Chaudhary, R.L. (1976) Seed germination of Triumfetta rhomboidea Jacq. Enum. Botanique 6, 103–108.Google Scholar
Conner, A.J., Conner, L.N. (1988) Germination and dormancy of Arthropodium cirratuin seeds. New Zealand Natural Science 15, 3–10.Google Scholar
Frankie, G.W., Baker, H.G., Opler, P.A. (1974) Comparative phenological studies of trees in tropical wet and dry forests in the lowlands of Costa Rica. Journal of Ecology 62, 881–913.CrossRefGoogle Scholar
Garwood, N.C. (1982) Seasonal rhythm of seed germination in a semi-deciduous tropical forest. pp. 173–185. in Leigh, E.G.;, Rand, A.S.;, Windsor, D.M. (Eds) The ecology of a tropical forest: seasonal rhythms and long-term changes. Washington, DC, Smithsonian Institution Press.Google Scholar
Garwood, N.C. (1983) Seed germination in a seasonal tropical forest in Panama: A community study. Ecological Monographs 53, 159–181.CrossRefGoogle Scholar
Ghosh, R.C., Mathur, N.K., Singh, R.P. (1976) Diospyros melanoxylon: its problems of cultivation. The Indian Forester 102, 326–336.Google Scholar
Grime, J.P., Mason, G., Curtis, A.V., Rodman, J., Band, S.R., Mowforth, M.A.G., Neal, A.M., Shaw, S. (1981) A comparative study of germination characteristics in a local flora. Journal of Ecology 69, 1017–1059.CrossRefGoogle Scholar
Harper, J.L. (1977) Population biology of plants. London, Academic Press.Google Scholar
Jain, S.K. (1982) Variation and adaptive role of seed dormancy in some annual grassland species. Botanical Gazette 143, 101–106.CrossRefGoogle Scholar
Myers, N. (1988) Threatened biotas: ‘hotspots’ in tropical forests. Environmentalist 8, 187–208.CrossRefGoogle ScholarPubMed
Ng, F.S.P. (1978) Strategies of establishment in Malaysian forest trees Tropical trees. pp. 129–162. in Tomlinson, P.B.;, Zimmerman, M.H.Tropical as living systems. Cambridge, England, Cambridge University Press.Google Scholar
Platt, W.J., Weis, I.M. (1985) An experimental study of competition among fugitive prairie plants. Ecology 66, 708–720.CrossRefGoogle Scholar
Rawat, M.M.S., Thapliyal, R.C. (2003) Endogenous rhythm in seed germination of Dendrocalamus strictus. Seed Science and Technology 31, 21–27.Google Scholar
Reddy, Y.N., Murthy, B.N.S. (1990) Studies on germinability and seedling vigour at different intervals of seed storage in ber ( Zizyphus mauritiana Lam). Indian Journal of Horticulture 47, 314–317.Google Scholar
Ridley, H.N. (1930) The dispersal of plants throughout the world. Ashford, Reeve and Co.Google Scholar
Roth, I. (1987) Stratification of a tropical forest as seen in dispersal types. Dordrecht, Dr. W. Junk Publisher.Google Scholar
Thapliyal, R.C., Connor, K.F. (1997) Effects of accelerated ageing on viability, leachate exudation, and fatty acid content of Dalbergia sissoo Roxb. seeds. Seed Science and Technology 25, 311–319.Google Scholar
Troup, R.S. (1921) Silviculture of Indian trees. Oxford, Clarendon Press.Google Scholar
Whitmore, T.C. (1974) Tropical rainforests of the far-east. Oxford, Clarendon Press.Google Scholar