It is well known as a naturally occurring epiphyte or endophyte of a wide range of plant species (e.g. apple, grape, cucumber, green beans, cabbage) without causing any symptoms of disease.

[5] A. pullulans can be cultivated on potato dextrose agar, where it produces smooth, faint pink, yeast-like colonies covered with a slimy mass of spores.

[6] These changes, potentially influenced by epigenetic factors, and the particular developmental sequences that the colonies proceed through may be observed with the naked eye.

[6] Besides these morphological plasticity A. pullulans is also adaptable to various stressful conditions: hypersaline, acidic and alkaline, cold, and oligotrophic.

pullulans from substrates with low water activity and the phyllosphere and a variety of other habitats; var.

[8] However, when the genome sequences of these varieties became available, the differences between them were considered as too large to be accommodated in a single species.

strains showed that the population of the species is homogeneous, with high levels of recombination and good dispersal.

[9] Despite the presence in the genome of a putative mating locus, and the observation of high recombination rates, no sexual cycle has yet been reported in this organism.