Ecological and Agricultural Significance of Bacterial Polyhydroxyalkanoates

  title={Ecological and Agricultural Significance of Bacterial Polyhydroxyalkanoates},
  author={Daniel E Kadouri and Edouard Jurkevitch and Yaacov Okon and Susana Castro-Sowinski},
  journal={Critical Reviews in Microbiology},
  pages={55 - 67}
Abstract Polyhydroxyalkanoates (PHAs) are a group of carbon and energy storage compounds that are accumulated during suboptimal growth by many bacteria, and intracellularly deposited in the form of inclusion bodies. Accumulation of PHAs is thought to be used by bacteria to increase survival and stress tolerance in changing environments, and in competitive settings where carbon and energy sources may be limited, such as those encountered in the soil and the rhizosphere. Understanding the role… 

Natural Functions of Bacterial Polyhydroxyalkanoates

In addition to its relevance for the plastic industry, PHA has important applications for agriculture, as those related to the production of reliable commercial inoculants, and in controlled release of insecticides when incorporated into degradable PHA granules.

A holistic view of polyhydroxyalkanoate metabolism in Pseudomonas putida.

PHA hydrolysis confers Bdellovibrio ecological advantages in terms of motility and predation efficiency, demonstrating the importance of PHA producers predation in population dynamics.

Biotechnological Production of Polyhydroxyalkanoates: A Review on Trends and Latest Developments

Exploring of capabilities like of dual production by microbes and use of wastes as renewable substrate under optimized cultural conditions either in batch or continuous process can cause deduction in present cost of bioplastic production from stored PHA granules.

Polyhydroxyalkanoates: Much More than Biodegradable Plastics.

Changes in microbial community structure during adaptation towards polyhydroxyalkanoates production.

This study examined the changes of bacterial communities in activated sludge through application of the molecular technique, ribosomal intergenic spacer analysis (RISA), which selected for a restricted microbial population, which were different in term of structure with respect to the initial microbial consortia in theactivated sludge used as inoculum.

Microbial cell factories for the production of polyhydroxyalkanoates.

Yeasts are presented as a potential candidate for industrial PHAs production, with their high amenability to genetic engineering and the availability of industrial-scale technology.



Polyhydroxyalkanoates degradation affects survival of Pseudomonas oleovorans in river water microcosms.

Mutants deficient in PHA degradation are useful to study the importance of reserve polymers in the survival of bacterial species in natural environments and could also provide an adequate system for the analysis of the role of PHA in the tolerance to physical or chemical stress agents.

Biochemical and molecular basis of microbial synthesis of polyhydroxyalkanoates in microorganisms.

This contribution summarizes the properties of PHA synthases and gives an overview on the genes for these enzymes and other enzymes of Pha biosynthesis that have been cloned and are available and summarizes the current knowledge on the regulation at the enzyme and gene level of P HA biosynthesis in bacteria.

Polyhydroxyalkanoate Degradation Is Associated with Nucleotide Accumulation and Enhances Stress Resistance and Survival ofPseudomonas oleovorans in Natural Water Microcosms

ABSTRACT Pseudomonas oleovorans GPo1 and its polyhydroxyalkanoic acid (PHA) depolymerization-minus mutant, GPo500 phaZ, residing in natural water microcosms, were utilized to asses the effect of PHA

Molecular basis for biosynthesis and accumulation of polyhydroxyalkanoic acids in bacteria.

Molecular data will be shown for genes of Alcaligenes eutrophus, purple non-sulfur bacteria, Such as Rhodospirillum rubrum, purple sulfur bacteria, such as Chromatium vinosum, pseudomonads belonging to rRNA homology group I, and for the Gram-positive bacterium Rhodococcus ruber.

Screening of Soil Bacteria for Poly-β-Hydroxybutyric Acid Production and Its Role in the Survival of Starvation

One strain that did not produce any energy reserve material displayed a prolonged viability under starvation conditions when grown in a nitrogen-free, carbon-rich medium prior to starvation.

Survival of poly-3-hydroxybutyrate-producing bacteria in soil microcosms

It is suggested that for predictive purposes, validation of survival in a variety of conditions is necessary and differences in survival capabilities and spore quality between strains is maintained in heterogeneous environments enriched with organic matter.

Biochemical and genetic analysis of PHA synthases and other proteins required for PHA synthesis.

Biodegradation of polyhydroxyalkanoic acids

An overview on the biodegradation of PHA is given to give an overview of the metabolism and biotechnological aspects of P HA and PHA depolymerases.

Poly‐β‐hydroxybutyrate metabolism in Azospirillum brasilense and the ecological role of PHB in the rhizosphere

In the presence of stress factors such as ultraviolet radiation, desiccation and osmotic stress, PHB-rich cells survived better thanPHB-poor cells and the possible utilization of PHB as a sole carbon and energy source by A. brasilense and other bacteria during establishment, proliferation and survival in the rhizosphere is discussed.

Metabolic Engineering of Poly(3-Hydroxyalkanoates): From DNA to Plastic

An overview of the different PHA biosynthetic systems and their genetic background is provided, followed by a detailed summation of how this natural diversity is being used to develop commercially attractive, recombinant processes for the large-scale production of PHAs.