Abstract:
:Facultative endosymbionts can benefit insect hosts in a variety of ways, including context-dependent roles, such as providing defense against pathogens. The role of some symbionts in defense may be overlooked, however, when pathogen infection is transient, sporadic, or asymptomatic. The facultative endosymbiont Rickettsia increases the fitness of the sweet potato whitefly (Bemisia tabaci) in some populations through mechanisms that are not yet understood. In this study, we investigated the role of Rickettsia in mediating the interaction between the sweet potato whitefly and Pseudomonas syringae, a common environmental bacterium, some strains of which are pathogenic to aphids. Our results show that P. syringae multiplies within whiteflies, leading to host death, and that whiteflies infected with Rickettsia show a decreased rate of death due to P. syringae. Experiments using plants coated with P. syringae confirmed that whiteflies can acquire the bacteria at a low rate while feeding, leading to increased mortality, particularly when the whiteflies are not infected with Rickettsia. These results suggest that P. syringae may affect whitefly populations in nature and that Rickettsia can ameliorate this effect. This study highlights the possible importance of interactions among opportunistic environmental pathogens and endosymbionts of insects.
journal_name
Appl Environ Microbioljournal_title
Applied and environmental microbiologyauthors
Hendry TA,Hunter MS,Baltrus DAdoi
10.1128/AEM.02447-14subject
Has Abstractpub_date
2014-12-01 00:00:00pages
7161-8issue
23eissn
0099-2240issn
1098-5336pii
AEM.02447-14journal_volume
80pub_type
杂志文章abstract::A high growth rate in bacterial cultures is usually achieved by optimizing growth conditions, but metabolism of the bacterium limits the maximal growth rate attainable on the carbon source used. This limitation can be circumvented by engineering the metabolism of the bacterium. Acinetobacter baylyi has become a model ...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.01837-14
更新日期:2014-11-01 00:00:00
abstract::Techniques and media for the production and regeneration of stable Clostridium acetobutylicum protoplasts are described. ...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.43.3.719-721.1982
更新日期:1982-03-01 00:00:00
abstract::Ten laboratories participated in an interlaboratory comparison of determination of bioleaching rates of a pyrite reference material. A standardized procedure and a single strain of Thiobacillus ferrooxidans were used in this study. The mean rate of bioleaching of the pyrite reference material was 12.4 mg of Fe per lit...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.57.3.642-644.1991
更新日期:1991-03-01 00:00:00
abstract::The competitive inhibition of fructokinase by glucose has been proposed as the mechanism by which Zymomonas mobilis preferentially consumes glucose from mixtures of glucose and fructose and accumulates fructose when growing on sucrose. In this study, incorporation of radioactive fructose into biomass was used as a mea...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.63.9.3519-3525.1997
更新日期:1997-09-01 00:00:00
abstract::Two vomitoxin-producing isolates of Fusarium spp. were grown on cracked corn for 1 to 8 weeks at 15, 20, 25, 28, and 32 degrees C. Maximum production of vomitoxin by Fusarium graminearum Schw. NRRL 5883 occurred at 30 degrees C and 40 days, and that by Fusarium roseum Schw. NRRL 6101 occurred at 26 degrees C and 41 da...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.43.4.967-970.1982
更新日期:1982-04-01 00:00:00
abstract::UNL-1, a lytic virus of Pseudomonas aeruginosa, was observed to express a novel inducible DNA damage reactivation activity in UV-A-irradiated P. aeruginosa host cells. The expression of bacteriophage reactivation was quantified in hosts exposed to either UV-C or UV-A radiation. While reactivation of UV-C-damaged UNL-1...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.65.6.2606-2613.1999
更新日期:1999-06-01 00:00:00
abstract::The human gut is host to a diversity of microorganisms, including the single-celled microbial eukaryote Blastocystis. Research has shown that most carriers host a single Blastocystis subtype (ST), which is unusual given the considerable within-host species diversity observed for other microbial genera in this ecosyste...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.00520-15
更新日期:2015-06-15 00:00:00
abstract::Transformed root cultures of three nonmycotrophic and one mycotrophic plant species stimulated germination and hyphal growth of the vesicular-arbuscular mycorrhizal fungus Glomus etunicatum (Becker & Gerd.) in a gel medium. However, only roots of the mycotrophic species (carrot) supported continued hyphal exploration ...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.59.8.2750-2752.1993
更新日期:1993-08-01 00:00:00
abstract::Escherichia fergusonii is an emerging pathogen that has been isolated from a wide range of infections in animals and humans. Primers targeting specific genes, including yliE (encoding a conserved hypothetical protein of the cellulose synthase and regulator of cellulose synthase island), EFER_1569 (encoding a hypotheti...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.04169-13
更新日期:2014-03-01 00:00:00
abstract::Growth and succinate versus lactate production from glucose by Anaerobiospirillum succiniciproducens was regulated by the level of available carbon dioxide and culture pH. At pH 7.2, the generation time was almost doubled and extensive amounts of lactate were formed in comparison with growth at pH 6.2. The succinate y...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.57.10.3013-3019.1991
更新日期:1991-10-01 00:00:00
abstract::Here, we report the genome of one gammaproteobacterial member of the gut microbiota, for which we propose the name "Candidatus Schmidhempelia bombi," that was inadvertently sequenced alongside the genome of its host, the bumble bee, Bombus impatiens. This symbiont is a member of the recently described bacterial order ...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.00322-14
更新日期:2014-07-01 00:00:00
abstract::Hepatitis A virus (HAV) is a food-borne enteric virus responsible for outbreaks of hepatitis associated with shellfish consumption. The objectives of this study were to determine the thermal inactivation behavior of HAV in blue mussels, to compare the first-order and Weibull models to describe the data, to calculate A...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.00428-14
更新日期:2014-05-01 00:00:00
abstract::Twenty fungal genera, including 14 Fusarium species, were examined for ice nucleation activity at -5.0 degrees C, and this activity was found only in Fusarium acuminatum and Fusarium avenaceum. This characteristic is unique to these two species. Ice nucleation activity of F. avenaceum was compared with ice nucleation ...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.58.9.2960-2964.1992
更新日期:1992-09-01 00:00:00
abstract::In in vitro estuarine water and sediment chambers, the survival of Vibrio cholerae and Escherichia coli was determined by plate counting and direct counting techniques. V. cholerae strains included environmental, clinical, and serotype O1 and non-O1 isolates, whereas E. coli strains included ATCC 25922 and a freshly c...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.43.3.578-584.1982
更新日期:1982-03-01 00:00:00
abstract::To understand phage infection and host cell lysis mechanisms in pathogenic Salmonella, a novel Salmonella enterica serovar Typhimurium-targeting bacteriophage, SPN9CC, belonging to the Podoviridae family was isolated and characterized. The phage infects S. Typhimurium via the O antigen of lipopolysaccharide (LPS) and ...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.02279-13
更新日期:2014-01-01 00:00:00
abstract::Mineralization of [U-(14)C]methyl t-butyl ether (MTBE) to (14)CO(2) without accumulation of t-butyl alcohol (TBA) was observed in surface-water sediment microcosms under denitrifying conditions. Methanogenic activity and limited transformation of MTBE to TBA were observed in the absence of denitrification. Results ind...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.67.4.1975-1978.2001
更新日期:2001-04-01 00:00:00
abstract::In this study, we examine bacterial attachment and survival on a titanium (Ti) cathode coated with various carbon nanomaterials (CNM): pristine carbon nanotubes (CNT), oxidized carbon nanotubes (O-CNT), oxidized-annealed carbon nanotubes (OA-CNT), carbon black (CB), and reduced graphene oxide (rGO). The carbon nanomat...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.00582-15
更新日期:2015-07-01 00:00:00
abstract::Many insects are associated with heritable symbionts that mediate ecological interactions, including host protection against natural enemies. The cowpea aphid, Aphis craccivora, is a polyphagous pest that harbors Hamiltonella defensa, which defends against parasitic wasps. Despite this protective benefit, this symbion...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.01775-14
更新日期:2014-09-01 00:00:00
abstract::To determine whether the pathogenic variant of Lyme disease spirochetes, isolate A14S, is perpetuated in a particular reservoir-vector relationship, we screened vector ticks in various Central European sites for a related spirochete and determined its host association. A14S-like spirochetes infect numerous questing ti...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.70.11.6414-6419.2004
更新日期:2004-11-01 00:00:00
abstract::Gaeumannomyces graminis, the causative agent of take-all disease of wheat, barley, and oats, was detected in infected wheat seedlings by using the polymerase chain reaction to amplify Gaeumannomyces-specific DNA fragments. Nested primers and two rounds of amplification were used to amplify two fragments, approximately...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.57.2.553-556.1991
更新日期:1991-02-01 00:00:00
abstract::The reliable detection of airborne biological threat agents depends on several factors, including the performance criteria of the detector and its operational environment. One step in improving the detector's performance is to increase our knowledge of the biological aerosol background in potential operational environ...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.07212-11
更新日期:2012-03-01 00:00:00
abstract::Three species of saltmarsh ascomycetes were grown in the presence of all of the constituents of their natural substrate (leaves of cordgrass) or were presented only with aqueous extracts of the leaves. These two growth-condition treatments had no significant effect on total ergosterol content of the fungal mycelia, co...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.60.9.3479-3482.1994
更新日期:1994-09-01 00:00:00
abstract::The role of protease produced by a heterotrophic bacterium during growth was investigated with Aeromonas salmonicida, the pathogen of fish furunculosis, strain A-7301 and its protease-deficient mutant NTG-1 induced by mutagenesis. Strain A-7301 produced extracellular protease in a mixed amino acid medium (composed of ...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.50.4.1031-1037.1985
更新日期:1985-10-01 00:00:00
abstract::A method has been described which can compare the efficacy of different nongermicidal handwashing protocols for removal of transient microbial flora without the necessity of establishing or relying on a previously determined baseline for an individual subject. The wash effluent is collected, and colony counts for the ...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.49.5.1067-1071.1985
更新日期:1985-05-01 00:00:00
abstract::The mechanisms of metal resistance of a cadmium-resistant Alcaligenes sp. were studied. Growth in a defined medium was unaffected by cadmium at concentrations up to 0.1 mM, while at concentrations up to 2.5 mM, growth occurred after an extended lag phase. The increase in length of the lag phase was abolished by repeat...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.51.3.515-520.1986
更新日期:1986-03-01 00:00:00
abstract::The initial microbial colonization of tooth surfaces is a repeatable and selective process, with certain bacterial species predominating in the nascent biofilm. Characterization of the initial microflora is the first step in understanding interactions among community members that shape ensuing biofilm development. Usi...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.72.4.2837-2848.2006
更新日期:2006-04-01 00:00:00
abstract::Comparisons of 16S rDNA sequences were used to determine the phylogeny of not-yet-cultured spirochetes from hindguts of the African higher termite, Nasutitermes lujae (Wasmann). The 16S rRNA genes were amplified directly from spirochete-rich hindguts by using universal primers, and the amplified products were cloned i...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.62.2.347-352.1996
更新日期:1996-02-01 00:00:00
abstract::Cadmium is an important heavy metal pollutant. For this study, we investigated the effects of cadmium exposure on the oxidative stress responses of Xanthomonas campestris, a soil and plant pathogenic bacterium. The exposure of X. campestris to low concentrations of cadmium induces cross-protection against subsequent k...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.71.4.1843-1849.2005
更新日期:2005-04-01 00:00:00
abstract::Marine viruses are an important component of the microbial food web, influencing microbial diversity and contributing to bacterial mortality rates. Resistance to cooccurring cyanophages has been reported for natural communities of Synechococcus spp.; however, little is known about the nature of this resistance. This s...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.00356-07
更新日期:2007-09-01 00:00:00
abstract::Electrorotation is a noninvasive technique that is capable of detecting changes in the morphology and physicochemical properties of microorganisms. Electrorotation studies are reported for two intestinal parasites, Giardia intestinalis and Cyclospora cayetanensis. It is concluded that viable and nonviable G. intestina...
journal_title:Applied and environmental microbiology
pub_type: 杂志文章
doi:10.1128/AEM.67.2.586-590.2001
更新日期:2001-02-01 00:00:00