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NITA ETIKAWATI
Jurusan Biologi FMIPA UNS Surakarta
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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A Cytotaxonomic Study in the Genus Zingiber NITA ETIKAWATI; AHMAD DWI SETYAWAN
Biodiversitas Journal of Biological Diversity Vol. 1 No. 1 (2000)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d010101

Abstract

The objective of the study was to know the taxonomic structure of the genus of Zingiber based on cytological characters such as ratio of number, shape and size of chromosome. Zingiber specimens were mainly from Bogorbotanical garden. There were seven species studied, Z. amaricans Nor., Z. aromaticum Val., Z. cassumunar Roxb., Z.gramineum Bl., Z. officinale Roxb., Z. ottensii Val. and Z. zerumbet (L.) J.E. Smith. Z. officinale (local name: Jahe)consinsting of 4 varieties, big ginger (jahe gajah), red ginger (jahe merah), small ginger (jahe emprit) and blue-darkbrowny ginger (jahe wulung). Species identification was based on the literature such as of Backer and Bakhuizen van den Brink (1968), Holttum (1950), and Burkill (1935). Semi permanent squash method using acetoorcein dye was used to prepare the sample (Darnaedi, 1991; Okada, 1981; Robert and Short, 1979). The results of the study indicate that the number of chromosomes of all species studied were the same, 2n=32. The length size of the first chromosome pair was about 2μm. The shape of the chromosomes was mostly metacentric. Length and shape of each pair of chromosomes were hard to be determined accurately using this method, so that the chromosomal karyotype map unable to be constructed in this study. Giemsa C-banding method might be used to solve theproblems.© 2000 Jurusan Biologi FMIPA UNS Surakarta
Population Dynamics of Biota on the Roots of Azolla microphylla Kaulfuss NITA ETIKAWATI; JUTONO JUTONO
Biodiversitas Journal of Biological Diversity Vol. 1 No. 1 (2000)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d010105

Abstract

Azolla was a special fern that their associations with Anabaena azollae able to fix free nitrogen from air, to produce protein. Although by the ages, biota diversity those habits on the roots of Azolla increased and effected to protein concentration. The research was to find out population dynamics of biota on the roots of Azolla microphylla Kaulfuss and the growth peak. This study used Completely Randomized Design with 10 kinds of biota, i.e. bacteria, Fungi, Actinomycetes, Protozoa, Alga, Crustacean, Rotifers, Coelenterate, Insect and Molluscs, and it was used 3 replications. Research was conducted within 4 weeks and the populations of biota were observed every week. Data were statistically analyzed using Analysis Variant and Duncan’s Multiple Range Test. The population dynamics ofbiota on the roots of Azolla microphylla Kaulfuss were influenced on its quantity and composition, and the growthpeak is done in 2nd week.© 2001 Jurusan Biologi FMIPA UNS SurakartaKey words: Azolla, population dynamics, biota.
Co-Authors AHMAD DWI SETYAWAN JUTONO JUTONO