Studies On Distribution Of Dictyostelid Cellular Slime Molds In The Tropic And Frigid Zone Of China

The dictyostelid cellular slime molds are an unusual group which primarily living in the dead leaf,soil and animal dung.Their survival time was very transient and hardly to observe them by naked eyes, so they were easily cultured in lab. They feed primarily on bacteria, they can change the bacterial colony of soil and become one of the most important member of the forest ecosystems because of their special feeding way. On account of these characteristic, they are also a kind of ideal objects suitable for molecular biology, cytology and genetics.More than100dictyostelid species were published after the first dictyostelid species Dictyostelium mucorodies were isolated and described by Oskar Brefeld in1869, however, the researchers of dictyostelids in China were still at the initial stage.Until now,57dictyostelid species were reported in China, including46species of Dictyostelium (including10new species,1new variety,3species were only reported in Taiwan province),10species of Polysphondylium (including1new species,2species were only reported in Taiwan province), and1species of Acytostelium (this species was only reported in Taiwan province).In order to study the dictyostelids much more and compare the differences of them in different ecological conditions; it is the first recorded that to know the distribution about dictyostelids in the south of China. In this study, using the traditional morphology methods to isolate, culture and verificate the samples. Distribution of these species were reported in this paper that collected from the tropic and frigid zone of China. NSFC (Natural Science Foundation of China) supported the study. The descriptions and photographs of important life cycle stages of each species were given.There were23species in2genus in this study, they were isolated from851dead leaf and soil samples collected from northeast and south of China (including Hainan, Guangxi, Jilin, Liaoning et al) including2new records of Dictyostelium from China (D. rosarium, D. robustum),10new records of Dictyostelium from provinces (D. parvulum, D. macrocephalum, D. purpureum,D. microsorocarpium, D. multi-stipes, D. brevicaule Olive var.brevicaule, D. giganteum, D. sphaerocephalum var.evespigium, D. magnum, D. multicellularium);1new record of Polysphondylium from China (P. filamentosum),2new records of Polysphondylium from China's mainland (P. pseudo-candidum, P. pallidum), and4new records of Polysphondylium from provinces (P. candidum, P. violaceum, P. tenuissimum, P. anisocaule). Every species were conserved under the cold condition.