FISIOLOGI BUI DORMAN GEWANG (Corypha Man Lamarck)

BP Naiola
| Abstract views: 451 | PDF views: 634

Abstract

Gewang (Corypha utan Lamarck), a wild or semi-wild palm species distribute widely in Nusa Tenggara savanna with great potential(as building materials, drink and food), as traditionally have been exploited and utilized by local villagers for ages.To increase her potential should be promoted by plant domestication applied as on farm model such as agroforestry and social forestry. Seedlings availability is one of the basic need when comes to plant domestication. The only possibility of propagation in gewang is by generative phase (seeds). On the other hand, gewang seeds are known as orthodox, with low percentage of germination. This study shows that mature gewang seeds dropped under the mother trees are highly protected by tight tissues of endocarp and endosperm. Although the mature seeds in the nature seems ready to germinate, however there should be a dimensional balance (chemical, physical and physiological) or synchronization among components (endocarp/testa, endosperm and embryo) as a driving force to promote germination.In nature, the attainment of this synchronization/ dimensional balance of gewang seeds, are driven by external (both biotic and abiotic) factors as well such as fungi and climatic fluctuations. While artificial treatments like scarification, soaking, heating and acid are to accelerate the dimensional balance. Low embryo content per 100 seeds also responsible for low seed germination. It is suggested that low embryo content may be due to interactions among factors like low fertility of pollen grains, time incompatibility between gynoecium (stigma) and androecium (pollen grains) during pollen shed process and ineffectiveness of pollination due to great number of flowers.

Keywords

Gewang, Corypha utan Lamarck, fisiologi biji, dorman, kesamaan dimensi, sinkronisasi antarkomponen.

Full Text:

PDF

References

American Heritage Dictionary, The. 1977. Davies P (Ed.), Dell, New York.

Bewley JD and M Black. 1978. Physiology and Biochemistry of seeds. Volume I. Springer-Verlag. Berlin.

Bryant JA. 1985. Seed Physiology. Edward Arnold. London.

Deghan B and Perez HE. 2005. Preliminary Study Shows Germination of Caribbean applecactus (Harrisia fragrans) Improved with Acid Scarification and GibberellicAcid2.

Goswami CL. 1996. A Dictionary of Plant Physiology and Biochemistry. CBS Publisher, Darya Ganj, New Delhi.

Hanson J. 1983. Seed Storage Project. National Biological Institute. Indonesia Institute of Science.

Murashige T and Skoog F. 1962. A revised medium for rapid growth and bioassays with tobacco tissue culture. Physiol Plant 15,: 473-497.

Naiola BP, Harahap R, Siagian MH dan Rahayu M. 1992. Etnobotani Palm Timor: Tuak dan Gewang, Penghuni Savana Yang Setiap Mendukung Kehidupan Manusianya. Presiding Seminar dan Lokakarya Nasional Etnobotani, 306-311. Depdikbud RI, Deptan RI, LIPI dan Perpustakaan Nasional RI.

Naiola BP. 2005. Kajian Domestikasi Gewang {Corypha utan Lamarck) di Savana NTT untuk Keberlanjutan Pemanfaatan dan Upaya Meningkatkan Penggunaan Potensinya. Laporan Kemajuan Proyek, LIPI, Jakarta.

Naiola BP, JP Mogea, Subyakto, N Nurhidayat, T Partomihardjo, L Alhamd, DS Rini, KW Prasetiyo dan CY Bora, 2006. Kajian Domestikasi Gewang {Corypha utan Lamarck) di Savana NTT untuk Keberlanjutan Pemanfaatan dan Upaya Meningkatkan Penggunaan Potensinya. Laporan Akhir2006. Program Penelitian dan Pengembangan Iptek. Riset Kompetitif LIPI.

Naiola BP, ML Riwu Kaho dan DS Rini. 2007. Kajian Domestikasi Gewang {Corypha utan Lamarck) di Savana NTT untuk Keberlanjutan Pemanfaatan dan Upaya Meningkatkan Penggunaan Potensinya. Laporan Akhir 2006. Program Penelitian dan Pengembangan Iptek. Riset Kompetitif LIPI.

Nasution RE dan Ong HC, 2003. Corypha utan Lamk. In: Brink M and RP Escobin (Eds.). Fibre Plants. PROSE A No. 17,114-117. Yayasan PROSEA (Plant Resources of South East Asia) Foundation, Bogor, Indonesia.

Ormeling JF. 1955. The Timor Problem: A Geographical Interpretation of An Under-developed Island. J.B.Wolters, Batavia and Groningen.

Salisbury FB and Ross CW. 1978. Plant Physiology. Wadsworth,Bdmont.

Simon, EW. 1984. Early events in germination. In: Seed Physiology, 77-115. DR Murray (Ed.). Academic.Sydney.

Sumiasri N. 1992. "Gewang", Tumbuhan Serbaguna Bagi Masyarakat Timor. Prosiding Seminar dan Lokakarya Nasional Etnobotani, 404-407. Depdikbud RI, Deptan RI, LIPI dan Perpustakaan Nasional RI.

Tomlinson PB. 1990. The Structural Biology of Palms. Clarendon, Oxford.


Refbacks

  • There are currently no refbacks.