Enterobacter spp.: A new evidence causing bacterial wilt on mulberry

Abstract

Thirty-six pathogenetic bacterial strains were isolated from wilted mulberry plants in Hangzhou, Zhejiang province of China. The six representative strains were confirmed to be involved in more than one Enterobacter species by common bacteriological test, electron microscope observation, hypersensitive reaction, Koch's postulates, physiological and biochemical test, biology, fatty acid methyl esters analysis (FAMEs), enterobacterial repetitive intergenic consensus-PCR (ERIC-PCR), 16s rRNA sequences analysis, and comparative analysis with 7 type strains and 3 reference strains. This is the first report on mulberry disease caused by Enterobacter spp. in the world providing new evidence on induction of the plant disease in this genus. The results are not only important in the mulberry disease management but also have significant scientific value for further studies of opportunistic human pathogens and environmental strains in Enterobacter.

Probiotic Consortia: Reshaping the Rhizospheric Microbiome and Its Role in Suppressing Root-Rot Disease of Panax notoginseng

“…In our study, we were tested about 10 strains isolated from diseased P. notoginseng plants, which belonged to Chryseobacterium, and Enterobacter genera, which caused P. notoginseng plants death (unpublished data), suggested these genera were positively correlated with plant death of P. notoginseng. Furthermore, the genera of Aeromonas, Chryseobacterium, Clostridium sensu stricto 1, Flavobacterium, Enterobacter, and Sphingobium showed massive accumulation in the rhizosphere soil of dead plants (control BT); four treatments, which are made of potential pathogenic bacteria, cause aquaculture animals disease and human and animal diseases (Wahli et al, 2005;Zhu et al, 2010). So, these genera may be important bacterial pathogens that positively contribute to the effects of P. notoginseng plant death.…”

Enterobacter sacchari sp. nov., a nitrogen-fixing bacterium associated with sugar cane (Saccharum officinarum L.)

“…Colonies of the five strains were light yellow, smooth, circular with entire margins and convex on nutrient agar (Difco) grown for 24 h. Colonies did not secret diffusible green fluorescent pigment on King’s medium B and were cream on YDC agar (10.0 g yeast extract, 20.0 g glucose, 20.0 g CaCO 3 , 15.0 g bactor-agar, 1 l distilled water) and dark pink with translucent margins on TZC agar (10.0 g peptone, 1.0 g casein hydrolysate, 5.0 g glucose, 12.0 g bactor-agar, 1 l distilled water). Bacterial cells were prepared for TEM as described previously (Zhu et al , 2010). The cells were 0.3–0.9 µm wide and 0.9–1.8 µm long rods with peritrichous flagella (Fig.…”

Pesticides Decrease Bacterial Diversity and Abundance of Irrigated Rice Fields

“…Domibacillus was one of the most frequent aerobic genera detected, but little is known about the species of this genus [28]. Among the 20 most frequently detected anaerobic genera ( Figure 3B), Enterobacter, Aeromonas, and Bacillus contain species that are both pathogenic and beneficial to the soil [26][27][28][34][35][36] whereas Paeniclostridium [50], Hathewaya/Clostridium [51], Escherichia/Shigella [43,44], and Enterococcus contain notable pathogens with no established roles in the soil [52]. Of the pathogenic genera, Escherichia/Shigella was the only genera that decreased in abundance in the exposed area.…”