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All Journal Microbiology Indonesia International Journal of Economics and Management
SYAMSUL BAHRI SYAMSUL BAHRI
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Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Immunology & microbiology Medicine & Pharmacology

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Genetic Diversity of Plant Growth Promoting Rhizobacteria of Bacillus sp. Based on 16S rRNA Sequence and Amplified rDNA Restriction Analysis SYAMSUL BAHRI SYAMSUL BAHRI; ARIS TRI WAHYUDI; NISA RACHMANIA MUBARIK
Microbiology Indonesia Vol. 3 No. 1 (2009): April 2009
Publisher : Indonesian Society for microbiology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (108.782 KB) | DOI: 10.5454/mi.3.1.2

Abstract

Plant-growth promoting rhizobacteria (PGPR) are rhizosphere associated soil-borne bacteria that can enhance plant growth and inhibit the development of root pathogens. Many soil bacteria have been used as PGPR, and one of them is Bacillus sp. The implementation of PGPR is constrained by genotype fluctuation that makes it inactive on the rhizosphere. Our previous study had characterized and revealed that 11 Bacillus sp. isolated from the soybean plant rhizosphere were PGPR. To asses and compare the genetic diversity of these isolates, Amplified Ribosomal DNA Restriction Analysis (ARDRA) and DNA sequence analysis of 16S rRNA were conducted. The construction of Neighbor-joining trees and bootstrap analysis of 100 resamples of ARDRA and 16S rRNA gene sequences were performed using Treecon software for windows ver. 1.3b. ARDRA analysis was done by using four restriction enzymes (RsaI, HaeIII, CfrI and HinfI), resulting in four phylotypes, respectively phylotype I (Bacillus sp. Cr24, Cr33, Cr64 and Cr68), phylotype II (Bacillus sp. Cr 31 and Cr66), phylotype III (Bacillus sp. Cr44 and Cr71) and phylotype IV (Bacillus sp. Cr67, Cr28 and Cr69). Results of BLASTN from 16S rRNA gene sequences showed that these isolates are genetically diversed. The evolution relationship of Bacillus sp. could be shown by the 16S rRNA gene sequences analysis, while ARDRA based on the digestion sites showed their variability.
The Influence of Cash Flow, Profitability, and Sales Growth on Stock Prices With Capital Structure as Intervening Variables in Banking Companies Listed on the Indonesia Stock Exchange 2015-2019 Nasution, Monica Angelin; Putri, Tengku Mella Syafrian; Sani, Ahmad; Syamsul Bahri, Syamsul Bahri
International Journal of Economics and Management Vol. 1 No. 01 (2023): IEM : International Journal of Economics and Management
Publisher : Cattleya Darmaya Fortuna

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54209/iem.v1i01.5

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This study aims to determine the effect of cash flow, profitability and sales growth on share prices and analyze the effect of cash flow, profitability and sales growth on stock prices with a capital structure as a variable in banking companies listed on the Indonesia stock exchange for the 2015–2019 period. Sampling using purposive sampling so that the number of samples taken is 34 companies with 5 years of observation with a total sample of 170 samples. This study uses secondary data, data collection techniques using documentation studies and literature studies and the method used is path testing. The results of this study indicate that profitability has a significant effect on capital structure, while cash flow and sales growth have no significant effect on capital structure in banking companies listed on the IDX for the 2015–2019 period. Cash flow, sales growth and capital structure have a significant effect on stock prices, while profitability has no significant effect on stock prices in banking companies listed on the IDX for the 2015–2019 period. The capital structure can mediate the effect of cash flow, profitability and sales growth on stock prices in banking companies listed on the IDX for the 2015–2019 period.
Co-Authors Ahmad Sani Aris Tri Wahyudi Nasution, Monica Angelin NISA RACHMANIA MUBARIK Putri, Tengku Mella Syafrian