Rosemytle leaves (Rhodomyrtus tomentosa (Ait.) Hassk) have been used by society to treat various diseases related to bacterial infections, such as dysentery and typhoid fever caused by Shigella dysenteriae and Salmonella typhi, respectively. This study aimed to evaluate the antibacterial activity of essential oils from rosemytle leaves against both bacterias. Extraction was performed with a macerating device using n-hexane, ethyl acetate, and ethanol extracts, sequentially. This study used the agar diffusion method to test the antibacterial activity applied to the essential oils with concentrations of 1000, 500, 250, 125, 62.5, and 31.25 μg/mL. The antibacterial test results showed that n-hexane and ethyl acetate extracts were active against both bacterias while ethanol extract was not. Then, isolates N1 and E1 were produced respectively from n-hexane extract and ethyl acetate extract. The MIC values of both N1 and E1 for S. dysenteriae, and S. typhi were the same, namely 125 μg/mL. Isolate N1 was an essential oil containing menthol (59.60%), caryophyllene (25.77%), and cubenol (14.63%) while isolate E1 was an essential oil containing (73.93%), pentanone (8.30%), alpha calacorene (7.58%), and calacorene (3.78%). Rosemytle leaves have the potential to be developed as a drug to treat dysentery and typhoid fever.

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Mangrove conditions in the region under pressure and degradation from year to year. The main cause of mangrove destruction in the Sembilang National Park (SNP) is cultivation or manufacture of fish ponds, especially in the Peninsula Banyuasin South Sumatra. The activities of these ponds have resulted in the degradation of mangrove, especially in greenbelt. The destruction of mangrove areas causes a decrease in the quality and extent of mangrove areas which result in the degradation of a variety of important functions. Damage to mangroves occur both at the regional, national and even up to the global level. The purpose of this study is to know the process of natural mangrove revegetation on former ponds. The composition of the type of vegetation that grows in the area of the former ponds in South Sumatra region SNP restoration consists of four species: Avicennia marina (Forssk.) Vierh., Avicennia alba Blume, Rhizophora mucronata Lam., and Portulaca villosa. The most dominant species of mangrove revegetation of former pond in SNP is A. marina.

The Research of Vegetation Analysis on Reclamation Area of Coal Mine of PT. Bukit Asam Tanjung Enim, South Sumatera was aimed to determine the types of vegetation that composing reclamation area was found in PT. Bukit Asam in terms of structure and composition. The research has been done in November until Desember 2014, in four reclamation area at PT. Bukit Asam, namely the area of reclaimed the Muara Tiga Besar Selatan, Mahayung, Klawas Timur, and the Muara Tiga Selatan having different strata age. the vegetation data includes rate of growth seedlings, saplings, poles, and tree obtained through transek method in the form plot lane. In each transect made a plot in size 20x20 m for tree level, 10 x 10 for poles level, 5x5 for saplings level, and 2x2 m for seedling and cover plants level. The results of this research, in the Muara Tiga Besar Selatan area was obtained the vegetation seedlings-cover plants and saplings level, each of 17 and 7 species. In the area Mahayung are only found level vegetation of seedlings-cover plants as many of 13 species. For the area Klawas Timur and Muara Tiga Besar Selatan was obtained growth level of seedlings-cover plants, saplings, poles, and tree each of 20, 4. 3, dan 2 species for Klawas Timur area, while on Muara Tiga Selatan area each obtained 19, 8, 7, and 3 species.The diversity index of species, overall in all area of reclamation and rate of growth included in the low category with value 0 ≤ H' ≤ 2.

Pemodelan pengaruh peningkatan suhu udara di Sumatera Selatan (1977,1997,dan 2017) terhadap laju transpirasi bibit Lansium domesticum Corr  dengan menggukan metode Potometer yang dimodifikasi menunjukkan terjadi peningkatan laju transpirasi bibit L.domesticum yang signifikan. Perlakuan suhu udara minimum 22,9 oC - 24,4 oC menyebabkan terjadin peningkatan laju transpirasi sebesar 3,66 mm3/g tanaman/jam, suhu udara rata-rata harian 26,3 oC - 27,6 oC menyebabkan terjadinya peningkatan laju transpirasi sebesar 7,76 mm3/g tanaman/jam, suhu udara maksimum 31,7 oC - 32,9 oC menyebabkan terjadinya peningkatan laju transpirasi sebesar 4,03 mm3/g tanaman/jam. Terjadinya peningkatan laju transpirasi dari pemodelan ini dapat memperkirakan bahwa adanya ancaman kelangsungan hidup L.domesticum dari dampak peningkatan suhu udara di Sumatera Selatan.