نتایج جستجو برای: avirulent pathogens

تعداد نتایج: 71282  

Journal: :The Plant cell 1999
C Nawrath J P Métraux

In Arabidopsis, systemic acquired resistance against pathogens has been associated with the accumulation of salicylic acid (SA) and the expression of the pathogenesis-related proteins PR-1, PR-2, and PR-5. We report here the isolation of two nonallelic mutants impaired in the pathway leading to SA biosynthesis. These SA induction-deficient (sid) mutants do not accumulate SA after pathogen inocu...

2015
Abhimanyu K. Singh M. Álvaro Berbís Mónika Z. Ballmann Michelle Kilcoyne Margarita Menéndez Thanh H. Nguyen Lokesh Joshi F. Javier Cañada Jesús Jiménez-Barbero Mária Benkő Balázs Harrach Mark J. van Raaij Kornelius Zeth

The virulent form of turkey adenovirus 3 (TAdV-3), also known as turkey hemorrhagic enteritis virus (THEV), is an economically important poultry pathogen, while the avirulent form is used as a vaccine. TAdV-3 belongs to the genus Siadenovirus. The carboxy-terminal region of its fibre does not have significant sequence similarity to any other adenovirus fibre heads of known structure. Two amino ...

2005
Aglika Edreva

Most plant protection methods currently applied use toxic chemicals noxious to the environment for pathogen and pest control. Induced resistance exploiting natural defense machinery of plants could be proposed as an alternative, non-conventional and ecologically-friendly approach for plant protection. Its introduction into agricultural practice could minimize the scope of chemical control, thus...

Journal: :Plant physiology 2009
Hwe-Su Yi Martin Heil Rosa M Adame-Alvarez Daniel J Ballhorn Choong-Min Ryu

Herbivore-induced plant volatiles affect the systemic response of plants to local damage and hence represent potential plant hormones. These signals can also lead to "plant-plant communication," a defense induction in yet undamaged plants growing close to damaged neighbors. We observed this phenomenon in the context of disease resistance. Lima bean (Phaseolus lunatus) plants in a natural popula...

Journal: :Infection and immunity 1999
S C Henderson D I Bounous M D Lee

Salmonellae are gastrointestinal pathogens of man and animals. However, strains that are host-specific avian pathogens are often avirulent in mammals, and those which are nonspecific are commensal in poultry. The objective of this study was to determine whether host specificity was exhibited by bacterial abilities to invade epithelial cells or resist leukocyte killing. In this study, leukocytes...

Journal: :International journal of occupational medicine and environmental health 2014
Anna Różańska Anna Szczypta Magda Baran Edyta Synowiec Małgorzata Bulanda Marta Wałaszek

OBJECTIVES The study presents data concerning occupational exposures among the staff of 5 hospitals in the Małopolska province in 2008-2012, taking into account the frequency and circumstances of exposure formation, occupational groups of hospital workers, as well as diversification of the reported rates in subsequent years between the hospitals and in each of them. An additional objective of t...

Journal: :The Journal of Experimental Medicine 1948
Hubert Bloch

Aqueous extracts of 11-day-old chick embryos enhance the growth of tubercle bacilli in oleic acid-albumin media. These extracts also increase the tendency of virulent strains to exhibit the serpentine pattern of growth and confer this property on avirulent variants which normally grow unoriented in clumps. Growth in the presence of chick embryo extract slightly increases the virulence of the vi...

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