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Recalcitrant forest tropical seeds storage and its effects example of symphonia globulifera l.f. from french guyana

, : Recalcitrant forest tropical seeds storage and its effects example of symphonia globulifera l.f. from french guyana. Bois et Forets des Tropiques (212): 35-46

Through the research of the best storage conditions for a timber species from French Guyana, Symphonia globulifera L.f. (Clusiaceae), a protocol has been defined to study the rain forest tropical seeds characterized by a high moisture content (recalcitrant seeds). Two storage methods, based on moist ambiant, had been proposed by the previous experiments: 1) place the seeds at, the lowest temperature which does not kill the embryo, 2) germinate the seeds at, then transfer at to limit the growth. The repercussions of these treatments on the subsequent development have been analysed. The storage over one year, according to the second method, results with a strong mortality for Symphonia globulifera ; the few anomalies observed during the treatment are not prejudicial to the subsequent development after planting out in nursery. For less than one year, the storage of this species does not pose any problem ; on longer periods only the first method appears to be satisfactory. It must be underlined that up to now the prevention of the germination of the tropical seeds with a high moisture content seems impossible through physical treatments. Will chemical methods reach this aim in the future?

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Related references

Bras, P.; Maury Lechon, G., 1986: Tropical tree seeds with a high moisture content: storage and its effects, example of Symphonia globulifera from French Guiana. Two storage methods were assessed: storage at 15 degrees C, the lowest temp. which does not kill the embryo; and germination at 25 degrees C followed by storage at 15 degrees C to limit growth. Both methods were equally successful for storage of u...

Bariteau, M., 1992: Natural regeneration in tropical rain forest in French Guiana: spatial distribution of Qualea rosea, Eperua falcata and Symphonia globulifera. Inventory data (collected 1986-88) were used to examine the spatial distribution of seedlings of three tropical tree species in experimental plots at Paracou. Seedlings were classified as small (height 5-150 cm) or large (height >150 cm, stem d...

Corbineau, F.; Come, D., 1986: Experiments on the storage of seeds and seedlings of symphonia globulifera l. f. guttiferae. Mature Symphonia globulifera seeds have a high moisture content (about 200% dry weight basis, or 66% wet weight basis) and die rapidly upon dehydration. Under ambient conditions, the smaller the seeds and the higher the temperature, the faster the...

Maury Lechon, G.; Corbineau, F.; Come, D., 1980: Preliminary data on the germination of seeds and the storage of seedlings of Symphonia globulifera (Guttifera). Untreated seeds of S. globulifera were kept at temperatures from 15 deg C to 40 deg C for 8 wk. Optimum temp. for germination was 25-30 deg C. Very few plants germinated at 15 deg C, and a temp. of 40 deg C induced considerable fungus development....

Maury-Lechon, G.C.rbineau,, D., 1980: Preliminary tests on the germination of seeds and the storage of seedlings of Symphonia globulifera L.f. (Guttiferae). Bois et forets des tropiques: (193) 35-40

Bariteau, M., 1992: Natural regeneration of rainforest in French Guyana: Spatial distribution of 3 species, Qualea rosea Aublet, Eperua falcata Aublet, Symphonia globulifera Linnaeus f. A natural regeneration survey concerning a systematic sampling of 1% of the area was carried out from 1986 to 1988 on 33 species from the French Guyana rainforest in the Paracou sylviculture and research area. The present study has focused on spat...

Thiel, J., 1984: Practical identification sheets for standing trees in the French Guianan forest. Symphonia globulifera. Bois et Forets des Tropiques (203): 54-55

Anonymous, 1996: Intermediate/recalcitrant tropical forest tree seeds. Proceedings of a workshop on improved methods for handling and storage of intermediate/recalcitrant tropical tree seeds, 8-10 June, 1995, Humlebaek, Denmark. This international workshop was organized jointly by the International Plant Genetic Resources Institute (IPGRI) and the DANIDA Forest Tree Seed Center at Humlebaek, in recognition of the problems (and costs) in handling, and especially storing, t...

Corbineau F.; Come D., 1989: Germination and storage of recalcitrant seeds of some tropical forest tree species. Annales des Sciences Forestieres (Paris) 46(SUPPL): 89S-91S

Gill, G.E.J.; Fowler, R.T.; Mori, S.A., 1998: Pollination biology of Symphonia globulifera (Clusiaceae) in central French Guiana. Floral visitors to 4 trees of Symphonia globulifera were monitored on 8-23 September 1994 in lowland moist forest in central French Guiana. The trees were 17-30 m tall and 18-26.5 cm dbh. Flower structure and longevity, and amount and sugar conten...