Effects of lactic acid bacteria activation methods on mud crab ( Scylla paramamosain ) hatching rate and the microbiota in larval culture

2021 ◽  
Author(s):  
Tong Li ◽  
Zhongwen Jin ◽  
Shicong Du ◽  
Chunling Liang ◽  
Yanting Wang ◽  
...  
2016 ◽  
Vol 25 (2) ◽  
pp. 849-866 ◽  
Author(s):  
Anita Talib ◽  
Kwong Kok Onn ◽  
Md Arif Chowdury ◽  
Wan Mustaffa Wan Din ◽  
Khairun Yahya

2015 ◽  
Vol 20 (1) ◽  
pp. 33 ◽  
Author(s):  
Heru Pramono ◽  
Pipin Suciati ◽  
Sapto Andriyono

Saluran pencernaan merupakan lingkungan kompleks yang terdiri atas berbagai spesies bakteri. Saluran pencernaan biota perairan terdiri atas bakteri aerob dan anaerob yang mampu memproduksi senyawa antibakteri dan enzim. Tujuan penelitian ini adalah untuk mengisolasi bakteri asam laktat yang menghasilkan protease dan senyawa bakteriosin-like dari saluran pencernaan kepiting bakau. Isolasi dan karakterisasi isolat dilakukan menggunakan media MRS. Supernatan netral bebas sel isolat telah diuji dengan menggunakan disc difusi agar terhadap bakteri patogen dan pembusuk. Uji produksi enzim protease telah diuji dengan metode disc diffusion agar menggunakan media kasein agar. Di antara seratus isolat, terdapat 96 isolat menunjukkan zona bening di MRS + CaCO3,, katalase negatif, dan bakteri Gram positif. Tiga puluh empat isolat bakteri asam laktat menghasilkkan protease dan hanya empat isolat (yaitu IKP29, IKP30, IKP52, dan IKP94) menunjukkan penghambatan yang kuat terhadap bakteri patogen dan pembusuk. Terdapat tiga pola inhibisi dari keempat isolate terhadap Bacillus subtilis, Staphylococcus aureus, Eschericia coli, dan Salmonella sp. Empat isolat tersebut berpotensi untuk dimanfaatkan sebagai starter pada produksi fermentasi produk hasil perikanan. Penelitian ini adalah penelitian pertama terkait isolasi bakteri asam laktat yang menghasilkan protease dan bakteriosin dari saluran pencernaan dari kepiting bakau.Kata kunci: Bakteri Asam Laktat, Bakteriosin-like substance, Protease, Scylla  sp. Digestive tract is complex environment consist of large amount of bacteria’s species. Fish intestine bacteria consist of aerobic or facultative anaerob bacteria which can produce antibacterial and enzym. The objectives of this research were to isolated lactic acid bacteria that produce bacteriocin-like and protease from mud crab digestive tract. Isolation and characterization of isolates were conducted employing media MRS.  Neutralized cell free supernatant of isolates were tested using disc diffusion agar of against pathogenic and spoilage bacteria to indicate bacteriocin-like-producing lactic acid bacteria. Protease-producing isolate was tested using disc diffusion method in casein agar. Among a hundred isolates, 96 isolates were showed clear zone in MRS+CaCO3,, catalase negative, and Gram positive bacteria. Thirty four isolates produced protease and only four isolates (i.e. IKP29, IKP30, IKP52, and IKP94) showed strong inhibition against pathogenic and spoilage bacteria. There were three patterns of inhibition among three isolates against Bacillus subtilis, Staphylococcus aureus, Eschericia coli, and Salmonella sp. All three isolates showed potential uses for produce starter culture for fishery product fermentation purpose. This is the first report of isolation lactic acid bacteria that produced protease and bacteriocin-like from digestive tract of mud crab. Keywords: Lactic acid bacteria, Bacteriocin-like substance, Protease, Scylla  sp.


AQUASAINS ◽  
2018 ◽  
Vol 7 (1) ◽  
pp. 629
Author(s):  
Heru Pramono ◽  
Pipin Suciati ◽  
Taruna Fernando Putra ◽  
Nova Andika ◽  
Sri Utari

Contamination of pathogenic and spoilage bacteria on fermentation process of seafood and fisheries product is a major concern on food safety. The aims of this study were isolating and applying the bacteriocin- and protease-producing lactic acid bacteria from the gastrointestinal tract of mud crab for starter culture of masin, a traditional fermented shrimp from East Java. This study consisted of characterization of lactic acid bacteria, the application on the fermentation process and microbial analysis. Ninety-four isolates were isolated from mud crab was screened for the bacteriocin and protease producing as well as characterized by pH, salinity and biochemical. Isolate IKP-29 was exhibited strong protease and bacteriocin activity. Application of Isolate IKP-29 on masin fermentation showed that sharp reduction of Escherichia coli, Vibrio sp. and lactic acid bacteria counted. This study suggested that the application of lactic acid bacteria which producing bacteriocin and protease improved the food safety of traditional fermented fish.


2019 ◽  
Vol 8 (2) ◽  
pp. 94
Author(s):  
Pipin Suciati ◽  
Wahju Tjahjaningsih ◽  
Endang Dewi Masithah ◽  
Heru Pramono

Abstrak Probiotik dapat didefinisikan sebagai mikroba hidup yang ditambahkan dalam jumlah tertentu yang mampu bertahan hidup dalam ekosistem saluran pencernaan. Enzim yang dihasilkan oleh mikroba yang diisolasi dari saluran pencernaan ikan dapat digunakan sebagai probiotik. Enzim proteolitik ekstraseluler secara alami diproduksi oleh mikroba untuk menghidrolisis polipeptida dalam media menjadi peptida dan asam amino. Bakteri asam laktat dapat menghasil enzim seperti protease, α-amilase, fitase, kitinase, lipase. Penelitian ini bertujuan untuk mendapatkan isolat bakteri asam laktat dari saluran pencernaan kepiting bakau (Scylla spp.) yang mempunyai aktivitas proteolitik. Penelitian ini menggunakan metode deskriptif berupa aktivitas enzimatis dan karakterisasi uji biokimia isolat bakteri asam laktat dari saluran pencernaan kepiting bakau (Scylla spp.). Jumlah kepiting bakau yang digunakan adalah 10 ekor. Hasil penelitian didapatkan tiga isolat bakteri asam laktat yang memiliki aktivitas proteolitik kuat, yaitu WK 28, WK 33, dan WK 53. Hasil uji biokimia isolat WK 28 termasuk ke dalam genus Pediococcus sp., isolat WK 33 termasuk ke dalam Lactobacillus sp., dan isolat WK 53 termasuk ke dalam genus Streptococcus sp. WK 28 (Pediococcus sp.) dan WK 33 (Lactobacillus sp.) mempunyai aktivitas proteolitik dan aktivitas lipolitik. Isolat WK 53 (Streptococcus sp.) mempunyai aktivitas enzimatis yaitu aktivitas proteolitik, amilolitik, dan lipolitik. Abstract Probiotics are defined as live microbes are added in a certain amount that is able to survive in the digestive tract ecosystem. Enzymes produced by microbes isolated from the digestive tract of fish can be used as probiotics. Extracellular proteolytic enzymes naturally produced by the microbes to hydrolyze a polypeptide in a media into peptides and amino acids. Lactic acid bacteria can produce enzymes such as proteases, α-amylase, phytase, chitinase, lipase. This study aims to get the lactic acid bacteria isolates from the gastrointestinal tract of mangrove crab (Scylla spp.) That have proteolytic activity. This research uses descriptive method such as enzymatic activity and biochemical characterization of isolates of lactic acid bacteria from the digestive tract of mangrove crab (Scylla spp.). Amount of mud crab used is 10 fish. The result showed three isolates of lactic acid bacteria that have a strong proteolytic activity, namely WK 28 WK 33 and WK 53. The results of biochemical tests WK 28 isolates belonging to the genus Pediococcus sp., Isolate WK 33 belonging to the Lactobacillus sp., And WK 53 isolates belonging to the genus Streptococcus sp. WK 28 (Pediococcus sp.) And WK 33 (Lactobacillus sp.) Have proteolytic activity and lipolytic activity. Isolates WK 53 (Streptococcus sp.) Have enzymatic activity is proteolytic activity, amylolytic, and lipolytic.


2002 ◽  
Vol 28 (1) ◽  
pp. 1-6 ◽  
Author(s):  
E Simova ◽  
D Beshkova ◽  
A Angelov ◽  
Ts Hristozova ◽  
G Frengova ◽  
...  

2020 ◽  
Vol 29 (12) ◽  
pp. 59-63
Author(s):  
O.I. Parakhina ◽  
◽  
M.N. Lokachuk ◽  
L.I. Kuznetsova ◽  
E.N. Pavlovskaya ◽  
...  

The research was carried out within the framework of the theme of state assignment № 0593–2019–0008 «To develop theoretical foundations for creating composite mixtures for bakery products using physical methods of exposure that ensure homogeneity, stability of mixtures and bioavailability of nutrients, to optimize diets population of Russia». The data on the species belonging of new strains of lactic acid bacteria and yeast isolated from samples of good quality gluten-free starter cultures are presented. A comparative assessment of the antagonistic and acid-forming activity of strains of lactic acid bacteria and the fermentative activity of yeast was carried out. The composition of microbial compositions from selected strains of LAB and yeast was developed. The influence of the starter culture on the new microbial composition on the physicochemical, organoleptic indicators of the bread quality and resistance to mold and ropy-disease was investigated.


Author(s):  
O.A. Savkina ◽  
◽  
G.V. Ternovskoi ◽  
M.N. Lokachuk ◽  
E.N. Pavlovskaya ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document