Format

Send to

Choose Destination
BMC Evol Biol. 2019 Mar 14;19(1):78. doi: 10.1186/s12862-019-1407-2.

Dictyostelium purpureum var. pseudosessile, a new variant of dictyostelid from tropical China.

Author information

1
Engineering Research Center of Chinese Ministry of Education for Edible and Medicinal Fungi, Jilin Agricultural University, Changchun, 130118, People's Republic of China.
2
Department of Biological Sciences, University of Arkansas, Fayetteville, AR, 72701, USA.
3
Engineering Research Center of Chinese Ministry of Education for Edible and Medicinal Fungi, Jilin Agricultural University, Changchun, 130118, People's Republic of China. fungi966@126.com.

Abstract

BACKGROUND:

Dictyostelid cellular slime molds (dictyostelids) are microscopic throughout their entire life cycle. The vegetative phase consists of single-celled amoeboid forms which live in the soil/leaf litter microhabitat of fields and forests along with animal dung, where they feed upon bacteria and other microbes, grow, and multiply until the available food supply is exhausted. When this happens, the amoeboid forms aggregate together in large numbers to form multi-celled pseudoplasmodia, which then give rise to fruiting bodies (sorocarps) that consist of supportive stalks and unwalled sori containing propagative spores.

RESULTS:

Dictyostelium purpureum var. pseudosessile, a new variant of dictyostelid, is described herein, based on morphological features and molecular data. This new variant was isolated from soil samples collected in two tropical areas of China. The complete spore-to-spore life cycle of this species, which required 50 h, including spore germination, myxamoebae, cell aggregation, pseudoplasmodium, and sorocarp formation, was documented. Descriptions and illustrations are provided for this species based on our collections. Data from ontogeny, morphology and phylogeny analyses (SSU) of D. purpureum var. pseudosessile confirm that it is a Group 4 species according to the newly proposed classification of dictyostelids.

CONCLUSIONS:

Our results suggest that the violet sori, widens at the midpoint of sorophore and simple recurved sorophore bases represent the prominent features for the new variant D. purpureum var. pseudosessile. The latter is a Group 4 species now known from two tropical areas of China where dictyostelids remains understudied.

KEYWORDS:

Dictyostelids; Ontogeny; Phylogeny; Taxonomy

Supplemental Content

Full text links

Icon for BioMed Central Icon for PubMed Central
Loading ...
Support Center