Tsror et al. (2001) reported that the application of Trichoderma harzianum in furrows reduced the incidence of black scurf significantly as compared with its application to the soil surface, which showed a relatively small effect. In summary, our results demonstrated that all fungi tested are effective for controlling R. solani diseases on potato. In our view, some constraints that could limit their effectiveness are rhizosphere
complexity and soil environment. In this context, their adaptability to field conditions, their toxicity for humans and animals as formulated products, and their time of application should be studied. This click here work was supported by the NSERC discovery grant to M.H. We thank the Canada Foundation for Innovation (CFI) for confocal microscopy facility support. We also thank Amandine Honore for technical assistance and Dr David Morse for comments and English editing. ”
“This study was designed to evaluate gene expression patterns of the planktonic and biofilm cells of Staphylococcus aureus and SalmonellaTyphimurium in trypticase soy broth adjusted to pH 5.5 and pH 7.3. The planktonic ATM/ATR inhibition and biofilm cells of multiple antibiotic-resistant S. aureus (S. aureusR) and S. Typhimurium (S. TyphimuriumR) were more resistant to β-lactams than those of antibiotic-susceptible
S. aureus (S. aureusS) and S. Typhimurium (S. TyphimuriumS) at pH 5.5 and pH 7.3. The relative gene expression levels of norB, norC, and mdeA genes were increased by 7.0-, 4.7-, and 4.6-fold, respectively,
in the biofilm cells of S. aureusS grown at pH 7.3, while norB, norC, mdeA, sec, seg, sei, sel, sem, sen, and seo genes were stable in the biofilm cells of S. aureusR. This study provides useful information for understanding gene expression patterns in the planktonic Inositol oxygenase and biofilm cells of antibiotic-resistance pathogens exposed to acidic stress. Over the last decades, the prevalence of antibiotic-resistant bacterial infections has been rapidly increased because of the repeated and prolonged use of antibiotics, leading to a serious health problem worldwide (Wegener, 2003; Gootz, 2010). The emergence of antibiotic-resistant bacteria has become of great concern for public health, which widely appears as frequent outbreaks in recent years (Boonmar et al., 1998; Van et al., 2007). Therefore, prevention strategies for antibiotic resistance are essential to control the spread of antibiotic-resistant pathogens. However, the discovery and development of novel antibiotics has lagged behind the emergence of antibiotic-resistant pathogens because of the lengthy and expensive processes, requiring phases of clinical investigation trials to obtain approval, and the lack of information on the antibiotic resistance mechanisms (Yineyama & Katsumata, 2006).