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All Journal Gontor AGROTECH Science Journal Marine Research in Indonesia
Arya Widyawan
Plant Protection Department, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Education

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POTENTIAL TOXIC CYANOBACTERIA IN THREE LAKES OF JAKARTA-BOGOR AREA, INDONESIA Prihantini, Nining Betawati; Widyawan, Arya; Rianto, Ronny; Ariyani, Yuni; Wardhana, Wishnu; Hendrayanti, Dian
Marine Research in Indonesia Vol 33, No 1 (2008)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5336.879 KB) | DOI: 10.14203/mri.v33i2.460

Abstract

The research was aimed to understand the composition and dominancy of aquatic microalgae, and to know the potential toxicity of Cyanobacteria occuring in three lakes of Jakarta-Bogor area. The study was done in 2006. The sampling sites were Lake Sunter 2 (North Jakarta), Lake Babakan (South Jakarta), and Lake Lido (Bogor). The water samples were taken using plankton-net (20 tan mesh) with horizontal tow. The results showed that. the number of microalgal genera in Sunter 2, Babakan, and Lido were different, i.e. 10 genera, 40 genera, and 14 genera, respectively. Cyanobacteria were dominant in Sunter 2 (96%) and Babakan (90.01%). The dominant Cyanobacteria in Sunter 2 was Planktothrix agardhii (53.48%), whereas in Babakan was Chroococcus dispersus (68.52%). The second abundant Cyanobacteria in Sunter 2 was Arthrospira (42.54%). Planktothrix agardhii and Arthrospira are known to produce harmful toxin.
A Survey of Phytopathogenic Fungi and Oomycetes in Riyadh, Saudi Arabia Arya Widyawan; Boy Valenza Damiri; Adyatma Irawan Santosa; Haris Setyaningrum
Gontor AGROTECH Science Journal Vol 1, No 2 (2015): Juni 2015
Publisher : University of Darussalam Gontor, Ponorogo, East Java Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21111/agrotech.v1i2.261

Abstract

A survey of phytopathogenic fungi and Oomyceteswas conducted in Riyadh, Kingdom of Saudi Arabia duringOctober 2008 – May 2009. Total of 223 samples were collectedfrom four regions; Al-Kharj, Oyaynah, Old Diriyah, and Al Amariyah. Isolation was done using Potato Dextrose Agar(PDA). Infected parts were cut then sterilized in chlorox(10%), then were put in petridish that contain PDA andincubated at 25-27 °C. A total twelve genera of fungi andsingle genera of Oomycetes were isolated from the infectedplants and identifi ed as Fusarium spp., Alternaria spp.,Helmintosphorium (Bipolaris) spp., Sclerotium spp., Rhizoctoniaspp., Cladosporium spp., Mauginiella scattae, Erysiphe spp.,Leveillula spp., Macrophomina phaseolina, Ustilago spp.,Ulocladium spp., and Phytium spp.
Co-Authors Adyatma Irawan Santosa Ariyani, Yuni Boy Valenza Damiri DIAN HENDRAYANTI Haris Setyaningrum Prihantini, Nining Betawati Rianto, Ronny Wardhana, Wishnu