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All Journal REINWARDTIA Biosaintifika: Journal of Biology & Biology Education BioEksakta : Jurnal Ilmiah Biologi Unsoed Agrikan: Jurnal Agribisnis Perikanan
Yeni Rahayu
Jurusan Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Riau, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Education Environmental Science Immunology & microbiology Veterinary

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NOMENCLATURAL STUDY OF TETRASTIGMA LEUCOSTAPHYLUM AND TETRASTIGMA RAFFLESIAE (VITACEAE): TWO COMMON HOSTS OF RAFFLESIA IN SUMATRA Rahayu, Yeni; Chikamawati, Tatik; Widjaja, Elizabeth A.
REINWARDTIA Vol 17, No 1 (2018): Vol.17 No.1
Publisher : Research Center for Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (822.368 KB) | DOI: 10.14203/reinwardtia.v17i1.3552

Abstract

RAHAYU, Y., CHIKMAWATI, T. & WIDJAJA, E. A. 2018. Nomenclatural study of Tetrastigma leucostaphylum and Tetrastigma rafflesiae (Vitaceae): two common hosts of Rafflesia in Sumatra. Reinwardtia 17(1): 59–66. – A study of Tetrastigma (Miq.) Planch. (Vitaceae) conducted in Sumatra has revealed a number of species records. There are two species were misinterpreted. Two species names are here discussed: T. leucostaphylum (Dennst.) Alston ex Mabb. and T. rafflesiae (Miq.) Planch., which formerly united with T. lanceolarium. 
Analisis Keanekaragaman Sagu (Metroxylon sagu Rottb.) pada Tiga Tipe Habitat di Pulau Padang Kepulauan Meranti Rahayu, Yeni; -, Fitmawati; -, Herman
Biosaintifika: Journal of Biology & Biology Education Vol 5, No 1 (2013): March 2013
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v5i1.2569

Abstract

Pulau Padang memiliki areal penanaman sagu (Metroxylon sagu Rottb.). Menurut pengetahuan masyarakat lokal terdapat tiga tipe habitat kebun sagu di Pulau Padang, yaitu Gambut, Kilang Manis, dan habitat bertanah liat. Produktifitas sagu berkorelasi dengan ketiga tipe habitat tersebut. Tujuan penelitian ini adalah mengungkap keanekaragaman sagu pada tiga tipe habitat di Pulau Padang dan menentukan tipe habitat yang mendukung produktifitas sagu yang tinggi, sebagai informasi dasar bagi upaya konservasi habitat sagu. Sebanyak 19 individu sagu telah dikoleksi dari tiga tipe habitat dan diamati karakter morfologi dan agronominya. Hasil karakterisasi ditemukan tiga tipe variasi sagu yaitu sagu duri, sagu sengke, dan sagu bemban. Analisis kluster menunjukan bahwa tanaman sagu mengelompok pada tiga kelompok utama berdasarkan asal habitat dan keberadaan durinya pada tingkat kesamaan 31-88%. Berdasarkan analisis komponen utama membagi tanaman sagu menjadi 5 kelompok, cenderung mengelompok juga berdasarkan asal habitat dan keberadaan duri dengan nilai akumulasi keragaman dua komponen utama 58%. Tipe habitat kilang manis direkomendasikan sebagai habitat sagu yang perlu dikonservasi di pulau Padang.Padang Island has a large sago plantation areas. Indigeneous people recognize three habitat types of sago in Padang island, i.e. peat, kilang manis and clay soil. The productivity of sago is closely correlated to the habitat types. The aims of this research were to reveal the diversity of Sago palms in three habitat types in Padang Island and to determine the habitat types which support high productivity of sago as the information base for conservation of sago habitats. The nineteen sago individuals were collected from three habitats and their morphological and agronomic characters were observed. The result of sago characterization obtained three variations of sago in Padang Island, namely Duri, Sengke and Bemban. The cluster analysis showed that sago dendrograms, which was grouped into three main groups based on similarities of origin and the presence of spines with 31-88% similarity coefficient. The principal component analysis classified the diversity of sago into five groups with 58% accumulated value of diversity. Furthermore, Kilang manis, which in recent study is known as a part of Peat habitat, needs to be conserved for sago plantation area.
Bioinformatic Analysis of the Cytb Gene to Estimate the Domestication Potential of Mahseer Fish Genus Tor spp. Permadi, Jefri; Sukmarani, Dhuta; Rahayu, Yeni
Agrikan Jurnal Agribisnis Perikanan Vol. 16 No. 1 (2023): Agrikan: Jurnal Agribisnis Perikanan
Publisher : Fakultas Pertanian, Universitas Muhammadiyah Maluku Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52046/agrikan.v16i1.1531

Abstract

The purpose of this study is to estimate the population of fish of the genus Tor as a source of proper domestication. Bioinformatic analysis was carried out by extracting data from the NCBI gene bank and alignment of the Cytb gene sequences using the ClustalW program to further analyze the nucleotide characteristics using MEGA software, determining genetic variation using the dnasp5 software, and using median joining analysis to reveal the relationship between Tor fish haplotypes from different locations. The results obtained from this study show that the haplotype diversity values of fish of the genus Tor spp. in the domesticated farm population and the natural population are still high, namely 0.9 and 0.8, respectively, as well as the occurrence of haplotype groupings based on other population origins. Domestication of Tor genus fish can be sourced from domesticated farms, and the wild is still ideal because the haplotype diversity is still high.
Respon Pertumbuhan dan Fisiologis Bayam (Amaranthus tricolor) yang Dipapar Timbal pada Sistem Hidroponik Sumbu Yuspiah, Eka Fitriani; Rahayu, Yeni; Miftahuddin, Miftahuddin
BioEksakta : Jurnal Ilmiah Biologi Unsoed Vol 3 No 4 (2021): BioEksakta
Publisher : Fakultas Biologi Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.bioe.2021.3.4.4767

Abstract

Green amaranth (Amaranthus tricolor) is a popular vegetable in Indonesia as a source of vitamins and minerals. This plant is susceptible to the contamination of heavy metals such as lead. This study aimed to analyze the growth responses and morphophysiological of A. tricolor in response to the application of lead in the forms of (Pb (NO3)2 using a wick hydroponic system. This study used factorial randomized design with four treatments of lead level, i.e. 0 ppm, 1 ppm, 3 ppm, and 5 ppm, repeated 2 times. Data were analyzed by analysis of one-way ANOVA and post hoc test by Duncan in P-value 5%. The growth responses were observed by measuring the plant height, the number of leaves, leaf color, shoot and roots fresh weight, also its dry weight. Whereas, the physiological responses were observed by analyzing the plant chlorophyll levels. The results obtained that the applications of (Pb(NO3)2 decreased plant height, leaf number, fresh weight of shoot and roots, dry weight of shoot and roots, also the chlorophyll levels. These lead treatments were affecting root loss, changed the color of leaves to become yellowish-green, and showing yellow-spotted close to the midrib. Analysis of lead uptake in stems and leaves showed that the absorption value increased along with the applications of (Pb(NO3)2 in the treatment. The treatment of 5 ppm of (Pb(NO3)2 showed the lowest result on all parameters.
Co-Authors Chikamawati, Tatik Dhuta Sukmarani, Dhuta Elizabeth A. widjaja, Elizabeth A. Fitmawati Fitmawati Herman - Jefri Permadi Miftahuddin Miftahuddin Yuspiah, Eka Fitriani