نتایج جستجو برای: spores

تعداد نتایج: 11195  

Journal: :Journal of bacteriology 2013
Saeed Banawas Daniel Paredes-Sabja George Korza Yunfeng Li Bing Hao Peter Setlow Mahfuzur R Sarker

The Gram-positive, anaerobic, spore-forming bacterium Clostridium perfringens causes a variety of diseases in both humans and animals, and spore germination is thought to be the first stage of C. perfringens infection. Previous studies have indicated that the germinant receptor (GR) proteins encoded by the bicistronic gerKA-gerKC operon as well as the proteins encoded by the gerKB and gerAA gen...

2017
Wishwas Abhyankar Linli Zheng Stanley Brul Leo J. de Koning Chris G. de Koster

Spore coat proteins play an important role in maintaining spore structure as well as the resistive capacity of the spores. Spore morphogenetic proteins are responsible for layering the proteinaceous layers during spore morphogenesis. Previous studies have analyzed the dependence of certain coat proteins on the well-known morphogenetic proteins such as SpoIVA, CotE, CotH etc. Yet many coat prote...

Journal: :Journal of Bacteriology 1931

2015
Julia Manetsberger Elizabeth A. H. Hall Graham Christie Ezio Ricca

Spores of Bacillus megaterium QM B1551 are encased in a morphologically distinctive exosporium. We demonstrate here that genes encoded on the indigenous pBM500 and pBM600 plasmids are required for exosporium assembly and or stability in spores of this strain. Bioinformatic analyses identified genes encoding orthologues of the B. cereus-family exosporium nap and basal layer proteins within the B...

Journal: :Critical reviews in microbiology 2015
Mahfuzur R Sarker Saeed Akhtar J Antonio Torres Daniel Paredes-Sabja

High hydrostatic pressure (HHP) is the most-widely adopted novel non-thermal technology for the commercial pasteurization of foods. However, HHP-induced inactivation of bacterial spores remains a challenge due to spore resistance to the treatment limits of currently available industrial HHP units (i.e. ~650 MPa and 50 °C). Several reports have demonstrated that high pressure can modulate the ge...

Journal: :Veterinary microbiology 2005
J M Flores M Spivak I Gutiérrez

Chalkbrood disease in honeybees (Apis mellifera L.) is caused by an infection with Ascosphaera apis. Disease expression requires the consumption of fungal spores and a predisposing condition in the susceptible brood. A. apis spores within sheets of wax foundation could be a source of inoculum leading to chalkbrood, but it is also possible that these spores remain confined in the wax and do not ...

Journal: :Journal of bacteriology 2007
Juan Francisco Leyva-Illades Barbara Setlow Mahfuzur R Sarker Peter Setlow

Alpha/beta-type small, acid-soluble spore proteins (SASP) are essential for the resistance of DNA in spores of Bacillus species to damage. An alpha/beta-type SASP, Ssp2, from Clostridium perfringens was expressed at significant levels in B. subtilis spores lacking one or both major alpha/beta-type SASP (alpha- and alpha- beta- strains, respectively). Ssp2 restored some of the resistance of alph...

Journal: :Journal of bacteriology 2010
Jie Wei Ishita M Shah Sonali Ghosh Jonathan Dworkin Dallas G Hoover Peter Setlow

Superdormant spores of Bacillus cereus and Bacillus subtilis germinated just as well as dormant spores with pressures of 150 or 500 MPa and with or without heat activation. Superdormant B. subtilis spores also germinated as well as dormant spores with peptidoglycan fragments or bryostatin, a Ser/Thr protein kinase activator.

2013

Detection and elimination of Bacillus spp. spores is a challenging task being faced by food industry and human life. Spore eradication techniques such as U.V., heat and other stress treatments fails due to dormant and robust nature of spores. Exposure of spores to specific germinants trigger germination and vegetative cells are formed which are metabolically very active and fragile so can be ea...

Journal: :Journal of experimental botany 2007
Daniel Ballesteros Christina Walters

Ex situ conservation of ferns may be accomplished by maintaining the viability of stored spores for many years. Storage conditions that maximize spore longevity can be inferred from an understanding of the behaviour of water within fern spores. Water sorption properties were measured in spores of five homosporeous species of ferns and compared with properties of pollen, seeds, and fern leaf tis...

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