ISSN: 0973-7510

E-ISSN: 2581-690X

Research Article | Open Access
Dalia Sukmawati1,2 , Dennika Dellanerra1, Nabilah Fikriyyah1, Sri Rahayu1, Nuniek Ina Ratnaningtya3, Hesham A. El Enshasy4,5,6 and Daniel Joe Dailin4
1Biology Department, 9th Floor Hasyim Ashari Building, Faculty of Mathematics and Natural Sciences, Universitas Negeri Jakarta, Jakarta, Indonesia.
2Universitas Negeri Jakarta Culture Collection (UNJCC), Kampus A, Jl. Rawamangun Muka, Gedung KH. Hasjim Asj’arie, Lantai 9, Jakarta, Indonesia.
3Biology Faculty, Jenderal Soedirman University, Jl. Dr. Suparno 63, Grendeng, Purwokerto, Jawa Tengah, 53122, Indonesia.
4Department of Bioprocess and Polymer Engineering, School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia.
5Institute of Bioproduct Development (IBD), Universiti Teknologi Malaysia (UTM), Johor Bahru, Malaysia.
6City of Scientific Research and Technology Applications, New Burg Al Arab, Alexandria, Egypt.
Article Number: 7588 | © The Author(s). 2022
J Pure Appl Microbiol. 2022;16(3):1969-1981. https://doi.org/10.22207/JPAM.16.3.47
Received: 01 February 2022 | Accepted: 21 May 2022 | Published online: 17 August 2022
Issue online: September 2022
Abstract

Pyrostegia venusta is known as an ornamental plant with its source of antioxidants, cytotoxic, anti-inflammatory, and anti-HIV compounds. Ephypitic molds are potentially co-existed on the surface of this flower since it contains essential nutrients which support their growth. On the other hand, molds produce several enzymes that might involve flower growth. The presence of ephypitic molds on this flower provides information about its ability to produce amylase. This study successfully isolated molds from August flower (P. venusta) originating from Taman Nasional Bedugul, Bali, Indonesia. The study aimed to isolate potential amylase producer strains and optimize the enzyme production using Solid-State Fermentation (SSF) method. Ten mold isolates belonging to Universitas Negeri Jakarta Culture Collection (UNJCC) were selected according to their amylolytic index (IA) values, morphological identification, and colony count number. Selected strains were optimized for its growth to produce amylase using the SSF method under different temperatures (30, 40, 50°C) and pH (6, 7, 8) with a wheat brain fermentation medium. Results showed that UNJCC F100 (6.53 × 108 CFU/ml) and UNJCC F106 (9.83 x 108 CFU/ml) are the two isolates with the highest IA values of 1.34 ± 0.1 and 1.08 ± 0.12 among all isolates. Based on molecular identification using ITS region, UNJCC F100 and UNJCC F106 were identified as A. subflavus (97% homology) and A. fumigatus (99.52% homology), respectively. This study exhibited that both isolate UNJCC F100 and isolate UNJCC F106 have optimal amylase production conditions at 30°C and pH 6. The enzyme produced was 19.99 U/ml at 30°C and 34.33 U/ml at pH 6 for isolate UNJCC F100, and for isolate UNJCC F106 is 28.55±3.80 U/ml. The two isolates are potentially used for amylase production, referring to the specific environmental condition. However, to generate a higher amount with amylase activity, other external variables such as medium used, inoculum concentration, and fermentation method are important to consider further for a larger application.

Keywords

Amylase, Molds, Pyrostegia venusta, Taman Nasional Bedugul, Solid-State Fermentation (SSF)

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