Comparison Between the Microbial Diversity in Carpenter Ant (Camponotus) Gut and Weaver Ant (Oecophylla) Gut

Comparison Between the Microbial Diversity in Carpenter Ant (Camponotus) Gut and Weaver Ant (Oecophylla) Gut

Hosmath & Timmappa J Pure Appl Microbiol, 13(4), 2421-2436 | December 2019 Article 5857 | https://doi.org/10.22207/JPAM.13.4.58 Print ISSN: 0973-7510; E-ISSN: 2581-690X RESEARCH ARTICLE OPEN ACCESS Comparison Between the Microbial Diversity in Carpenter Ant (Camponotus) Gut and Weaver Ant (Oecophylla) Gut Kirti Shivayogi Hosmath and Shivasharana Chandrabanda Timmappa* Department of Microbiology and Biotechnology, Karnatak University, Dharwad, Karnataka, India. Abstract Aim to study the whole genome of cultured and uncultured microbes present within the ant gut environment can only be determined by using the advanced technology used is Next-generation sequencing (NGS) tool. Here' in this research' this tool is been used to study the exact composition or population of gut microbes present in the two ants are: Carpenter ant (genus Camponotus) and Weaver ant (genus Oecophylla), by 16S/18S/ITS rDNA amplicon sequencing and comparing whether these two ants have same microbial species and same composition, if yes then what is their percentage of abundance in these ants gut and how these microbial diversity play role in these ants life cycle. And from this ant gut study, which is performed by metagenomic tools, revealed the presence of large diversity of microbes in these ant gut and are from the order and genus of bacteria commonly found are Actinomycetales, Bifidobacteriales, Actinobacteria, Bacteriodales, Flavobacteriales, Caulobacterales, Methanobacteriales, Lactobacillales, Clostridiales, Bradyrhizobacterium, Agrobacterium etc. here, the complete microbial diversity of Carpenter and Weaver ant guts are studied by performing 16S / 18S / ITS rDNA amplicon sequencing procedure, which includes, surface sterilization, dissection, culturing in basic media broth, genomic DNA extraction, quality control, rDNA variable region amplification, library construction, high-throughput sequencing, data analysis and identification of microbiome. This research is done to explore the vital functions of these microorganisms in the host (Ant) and their biotechnological applications in the environment. Keywords: Metagenomics,16s/18s/ITS rDNA identifiers, Non culturable, microbes, Microbiome, Weaver ant gut, , Carpenter ant gut. *Correspondence: [email protected] (Received: 18 September 2019; accepted: 19 December 2019) Citation: Kirti Shivayogi Hosmath and Shivasharana Chandrabanda Timmappa, Comparison Between the Microbial Diversity in Carpenter Ant (Camponotus) Gut and Weaver Ant (Oecophylla) Gut, J Pure Appl Microbiol., 2019; 13(4):2421-2436. https://doi. org/10.22207/JPAM.13.4.58 © The Author(s) 2019. Open Access. This article is distributed under the terms of theCreative Commons Attribution 4.0 International License which permits unrestricted use, sharing, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Journal of Pure and Applied Microbiology 2421 www.microbiologyjournal.org Hosmath & Timmappa J Pure Appl Microbiol, 13(4), 2421-2436 | December 2019 | https://doi.org/10.22207/JPAM.13.4.58 INTRODUCTION host, differs variedly based on the population The insects are of a large group of size, shape, and habitat and their functional organisms with say about 600,000 to 750,000 behavior21. Sometimes, the population size of species though the exact population study is yet microbes is very less and their taxa level contains lacking due to lack of their study in unexplored genus level microbes, which are generally found areas like in tropical ecosystems has to be studied1. in that particular habitat22,23. Many important Insects of all groups are colonized by a hugely functions of microbes present in these ant gut diverse group of microorganisms, say present in are unknown and which is a must to be explored. fore, mid and hindgut; these microbes present are Thus, to understand this microbial diversity (endo the important part in the life cycle of insects, like and ecto-symbionts) an advanced research to as in insects host nutrition, in their physiological explore the symbiosis between microbiota and behavior, etc. Among these insects, the ants of their host insects has to be studied in depth. order Hymenoptera and family Formicidae, have And this is only possible through the advanced studied to have the most abundant microbiota technology Next- generation- sequencing (NGS) present in their gut, but presently very little technology, where study on genes of important is known about their functions as microbial through multiplex illumine sequencing of 16SrRNA symbionts in ant host2. Hence, to study these amplicons gives a perfect classification of all the microbial diversity populations present in ant endo and ecto-symbionts present. Recently, more gut, a very useful and advanced technology is study is been carrying on the ants (Hymenoptera: used, the NGS (Next-generation-sequencing) Formicidae), which are attracting researchers technology, this shows the diversified microbiota due to their eusocial nature. Many important present in ant gut. Through this previous research3, functions of microbes present in these ant guts we understand that these insects of family are unknown and which is a must to be explored. Formicidae are continuously involved in symbiosis Here, in this research, we study the comparison with sap-feeding insects4, plants5 and with of microbial diversity between these two ants, of microorganisms6-8, like fixing of nitrogen by genus Camponotus (Carpenter ant)gut and genus recycling. Carpenter ant (Camponotus) gut is Oceophylla ( Weaver ant) gut, this comparison colonized by Blochmannia species, which helps microbial diversity of ant gut can be determined in getting amino acids as nutrition to host and and hence which also make us understand that also fixes nitrogen in plants nutrition by urease9,10. how these diversified microbes take part in the ant Insect gut has a very vast diversity of symbiotic lifecycle and by studying this microbial diversity microbes (bacterial and fungal) expanded by between these two ants, gives a way to explore harboring within the host gut, their mode of their most dominant microbes present in these transmission, and gut microbiota co-evolutionary ant gut and how they exactly play vital role in ants background with their insects hosts11-13. The lifecycle, which indirectly aids useful applications presence of these microbiota in hosts body results to environment. in different functional behavior of the hosts, like as a act as heritable symbiosis where microbes MATERIALS and METHODS harbored a million of years ago in aphids and Sample Collection these can’t survive without heritable symbiosis14. A commonly found ants like Camponotus And some groups of insects completely relay on ants (Carpenter ants) and Oecophylla (Weaver Obligate symbiosis of gut microbes where, in a long ants), say total of 10 species of each ants were run many ancestral genes are degraded as in the collected from surrounding areas of Biochemistry sap-feeding insects, where two obligate bacterial department, Karnatak University Dharwad, symbiosis were found15. And effects of many Karnataka, India. The collection was done in the Facultative endosymbionts microbes in the host month of July – September 2017. These collected life cycle has been revealed and resulted in their ants each were stored in separate plastic air tight sensitivity towards their really enemies16-18. Which boxes with the lids holed for proper aeration. The indirectly interrupts in the insects population colonies of these two ants collected were stored size19,20,16. The microbial taxa present in the insects in -20°C for 30 min until further processing. Journal of Pure and Applied Microbiology 2422 www.microbiologyjournal.org Hosmath & Timmappa J Pure Appl Microbiol, 13(4), 2421-2436 | December 2019 | https://doi.org/10.22207/JPAM.13.4.58 Sample Culture sequences and Illumina adapter sequences. Care The stored both Carpenter ants and was taken while designing these primers to allow Weaver ants in under -20° for 30 min and were multiplexing of samples but without allowing then aseptically subjected to surface sterilization in primer dimer formation or secondary structures laminar airflow to remove surface microbes from that would reduce PCR efficiency. The primer the ants’ external body. Materials used for surface sequences were used as given in Illumina protocol 27, 28 sterilization were distilled H2O, 70% ethanol/ for 16S metagenomic DNAsequencing . isopropyl alcohol (strong sterilizing agent). The PCR Amplification ants were then transferred in stopper big test PCR amplification of target region was tubes and washed/ treated with 70% ethanol for performed. PCR conditions were optimized for about 10-15 minutes by continuously shaking each primer set that is different only by the and later rinsed with distilled water, this step was barcoding indices. V3& V4 regions were performed 5-6 times and at least for 30-35 min. amplified from the DNA samples and purified this step was repeated to assure the complete using Agencourt XP beads. The library was removal of the surface microbes from these two then quantified using QUBIT dS DNA HS kit and ants external surface. Once done, these washed normalized to10 nMol/l for sequencing. The library or cleaned ants are dissected and crushed into QC was done using an Agilent Bioanalyser DNA HS fine paste and transferred to nutrient broth tubes Chip. aseptically and incubated at

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