Aeromonas hydrophila, PHBHHx

Aeromonas hydrophila is a heterotrophic bacterium found in warm climates, and in fresh, salty, marine, estuarine, chlorinated, and unchlorinated water. In addition, it is resistant to refrigeration and cold temperatures. This bacterium produces a PHA copolyester consisting of (/ )-3-hydroxybutyrate and (/ )-3-hydroxyhexanoate (PHBHHx Chen et al. 2001). To understand the relationship between enhanced survival abihty and PHA accumulation of A. hydrophila, the physiological behaviors of a wild type and a phaC mutant were compared. The ability of the phaC mutant to survive UV irradiation, heat and cold treatment, ethanol, osmotic pressure, and oxidative stress was significantly impaired as compared with that of the wild type. Thus, PHBHHx synthesis and accumulation in A. hydrophila is another example of positive correlation between resistance to environmental stresses and PHA accumulation (Zhao et al. 2007). 

Aeromonas hydrophila No PHBHHx Laurie acid <50 <50% P G,Jiangmen Biotech Ctr, China... 

Aeromonas hydrophila phhAB + vgb PHBHHx Laurie acid -50 >50% Shandong Lukang, China... 

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