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. 2023 Apr 7;9(4):e15256.
doi: 10.1016/j.heliyon.2023.e15256. eCollection 2023 Apr.

DIVERISTY and enzymatic potential of indigenous bacteria from unexplored contaminted soils in Faisalabad

Ayesha Munawar  1 , Musrat Shaheen  1 , Sobia Ramzan  1 , Somi Akram Masih  1 , Faiza Jabeen  2 , Tahira Younis  3 , Maryam Aslam  1
Affiliations

DIVERISTY and enzymatic potential of indigenous bacteria from unexplored contaminted soils in Faisalabad

Ayesha Munawar et al. Heliyon. .

Abstract

Bacteria residing in contaminated waste soil degrade and utilize organic and inorganic material as a source of nutrients as well as reduce environmental contamination through their enzymatic machinery. This enzymatic potential of indigenous bacteria can be exploited at industrial level through detailed screening, characterization, optimization and purification. In present study, diversity and enzymatic potential of indigenous bacteria was investigated through qualitative and quantitative screening methods from unexplored contaminated soil waste sites in Faisalabad. Shannon diversity (H') index revealed that twenty-eight soil samples from four contaminated sites were highly diverse of amylase, protease and lipase producing bacteria. Maximum protease producing bacteria were detected in fruit waste (1.929 × 107), whereas amylase and lipase producing bacteria were found in industrial (1.475 × 107) and (5.38 × 106), in household waste soil samples. Most of the indigenous bacterial isolates showed potential for multiple enzymes. An isolate OC5 exhibited capability for amylase production and optimization at a wider range of cultural conditions; pH (6-8), temperature (25 °C, 37 °C, 45 °C), incubation time (24-72 h), and NaCl concentrations 0.5-13%, using (1%) starch and lactose as substrates. An isolate OC5 was identified by molecular identification and phylogenetic analysis showed 99% sequence similarity with Bacillus spp. ANOVA was used to analyzed all data statistically. This study enhances the importance of initial screening and reporting of industrially potent indigenous bacteria from unexplored contaminated waste soils. In future, indigenous bacteria in contaminated wastes may be good candidates to solve various environmental pollution problems.

Keywords: Amylase; Fruit waste; Incubation time; Indigenous bacteria; Lipase; Oil contaminated waste; Protease; Soil samples; Substrate; Zone.

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Conflict of interest statement

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Figures

Fig. 1
Fig. 1
Amylase zones around bacterial isolate OC5 on starch after 48 h.
Fig. 2
Fig. 2
(A) Effect of various pH on growth of bacterial isolate OC5 on starch, (b) lactose, (c) Effect of various temperature on production of amylase from isolate OC5 on starch, (d) lactose.
Fig. 3
Fig. 3
(A) Effect of various pH on amylase activity of bacterial isolate OC5 on starch, (b) lactose, (c) Effect of various temperature on production of amylase from isolate OC5 on starch, (d) lactose.
Fig. 4
Fig. 4
Bacterial isolate OC5 Neighbor-joining phylogenetic tree based on comparative 16 S rRNA gene sequence analysis.
See this image and copyright information in PMC

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