Banana being a major food crop all around the world, attracts various research interests in crop improvement. In banana, complete genome sequences of Musa accuminata and Musa balbisiana are available. However, the mitochondrial genome is not sequenced or assembled. Mitochondrial (mt) genes play an important role in flower and seed development and in Cytoplasmic Male Sterility. Unraveling banana mt genome architecture will be a foundation for understanding inheritance of traits and their evolution. In this study, the complete banana mt genome is assembled from the whole genome sequence data of the Musa acuminata subsp. malaccensis DH-Pahang. The mt genome sequence acquired by this approach was 409574 bp and it contains, 54 genes coding for 25 respiratory complex proteins 15 ribosomal proteins, 12 tRNA genes and two ribosomal RNA gene. Except atpB, rps11 and rps19 other genes are in multiple copies. The copy number is 12 in tRNA genes. In addition, nearly 25% tandem repeats are also present in it. These mt proteins are identical to the mt proteins present in the other members of AA genome and share 98% sequence similarity with M. balbisiana. The C to U RNA editing is profoundly higher (87 vs 13%) in transcripts of M. balbisiana (BB) compared to M. accuminata (AA). The banana AA mitochondrial genome is tightly packed with 233 genes, with less rearrangements and just 5.3% chloroplast DNA in it. The maintenance of high copy number of functional mt genes suggest that they have a crucial role in the evolution of banana.

Dengue is a mosquito borne viral disease and the main root cause vector is Aedes aegypti. Hence in this work a rapid measure was taken to eradicate the vector using nanoemulsion. Plant essential oil based nanoemulsions was formulated by ultrasonic emulsification method.  In the current study, nanoemulsion (O/W) was developed using oil extracted from the leaves of a Tulsi, Neem and Nochi. The emulsions were prepared in different ratios of oil and surfactant (Tween 80) and evaluated for their mechanical and thermal stability. After the confirmation of stable nanoemulsion formation, it was evaluated for its antibiofilm activity. Results revealed that the formulated mixed oil nanoemulsion exhibited enhanced antibiofilm activity against isolated microorganisms from contaminated wall samples. Further the biofilm forming capability of bacterial culture was indirectly assessed by staining with 1% crystal violet and measured absorbance using ethanol as a destaining solution. The mean biofilm production of S3 bacterial isolates significantly greater than that observed for S1 & S2. In addition, antibiofilm activity of the emulsion NE3 was higher against bacterial culture S3. Different concentration of mixed oil nanoemulsiom (NE3) treated group was subjected to evaluate the larvicidal activity against Aedes aegypti between 1 to 12 hours respectively. It was observed that an increase in the nanoemulsion concentration (NE3) to 25 ppm and 50 ppm resulted in complete loss of larval viability in 5 hr and 6 hr respectively. There is no significant difference in larval viability after 6 hr and 12 hr in all the treatment groups. Hence the above findings suggest the applicative potential of mixed nanoemulsion formulation for various applications including mosquito larval control and antibiofilm activity.