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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Bioma : Jurnal Biologi Indonesia
Wardana, Nurul Assyifa
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Immunology & microbiology Materials Science & Nanotechnology Physics

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KEANEKARAGAMAN FITOPLANKTON DI DANAU KENANGA UNIVERSITAS INDONESIA, JAWA BARAT Koen Asharo, Rizal; Pasaribu, Pinta Omas; Rizkawati, Vina; Priambodo, Rizky; Hakim, Abdul; Fathulhuda, Nur Wahyu; Fajriah, Winda Nurul; Ilahi, Muthiah Rahmah; Wardana, Nurul Assyifa
Bioma Vol. 19 No. 2 (2023): Bioma
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/Bioma19(2).6

Abstract

In addition to urban forest area at the University of Indonesia, Depok Campus, West Java, there are lakes that functions as water reservoir area. University of Indonesia is eager to create green and beautiful campus environment with one of its efforts is to care for the lake ecosystem in the campus. This study was conducted to analyze the diversity of phytoplankton in the lake. Sampling was carried out by determining 3 location points with 3 times repetitions conducted on different days. The water samples taken were then identified at the Biology Laboratory FMIPA UNJ. The mean values of water quality parameters obtained were pH 10, TDS 90 ppm, temperature 30°C, and water clarity 46 cm. The results showed that 14 genera and 20 species have been found, they are Chlorophyta, Chroococcus, Coelosphaerium, Crucigeniella, Euglena, Gloeocapsa, Merismopedia, Pediastrum (3 species), Peridinium, Scenedesmus (4 species), Tablelaria, Tetrastrum, Volvox, and Westella (2 species). The Diversity Index Shannon-Wiener during the observation was 2.9, which means that the condition of water at the University of Indonesia Lake was very good and not polluted. The availability of phytoplankton in the area was generally sufficient which can be utilized by other organisms as food source.
Isolation and Characterization of Pathogenic Mold Causing Potato Tuber Rot Disease Asharo, Rizal Koen; Indrayanti, Reni; Amala, Azizatul; Raihan, Eldrian Daffa; Tampanguma, Raymond Rayhand; Putri, Hilda Arsyah Eka; Pasaribu, Pinta Omas; Wardana, Nurul Assyifa
Jurnal Penelitian Pendidikan IPA Vol 10 No 4 (2024): April
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i4.6355

Abstract

The potato plant (Solanum tuberosum L.) is a perennial crop that contains high amounts of carbohydrates, minerals, and vitamins in its tubers, making it a carbohydrate-rich alternative food to rice or corn. One of the diseases that often appear on potato plants is potato rot caused by pathogenic molds. This study aims to isolate and characterize pathogenic fungi that cause blight on potato tubers based on Koch's Postulates. Potato pathogenic molds were isolated from potato tubers that had been rotted, then the molds were grown on PDA and purified twice. The purified isolates were then inoculated onto 30 healthy potato tubers and incubated for 7 days. Healthy potato tubers experienced the same symptoms as potato tuber rot. The isolated pathogenic fungi were then characterized so that the pathogenic fungi of Phytophthora infestans were obtained. In this study, Koch's Postulate method was successfully applied to isolate and characterize the pathogenic fungi that cause potato tuber rot. The pathogenic fungi caused a potato tuber rot disease incidence value of 100% with a disease severity value of 60.7%. The two factors that determine the disease incidence and disease severity values are internal factors (genes and traits of the pathogen) and external factors (environment).
Co-Authors Abdul Hakim Amala, Azizatul Fajriah, Winda Nurul Fathulhuda, Nur Wahyu Ilahi, Muthiah Rahmah Koen Asharo, Rizal Pinta Omas Pasaribu Putri, Hilda Arsyah Eka Raihan, Eldrian Daffa Reni Indrayanti Rizal Koen Asharo Rizkawati, Vina Rizky Priambodo Tampanguma, Raymond Rayhand