Dual contribution of embryonic ventral blood island and dorsal lateral plate mesoderm during ontogeny of hemopoietic cells in Xenopus laevis.

摘要: The early embryonic development of hemopoietic cells in Xenopus laevis was examined. Either dorsal lateral plate (DLP) or ventral blood island (VBI) mesoderm reciprocally transplanted between cytogenetically distinct (2N 3N) stage 14 to 19 (neural fold) embryos. F-DNA content circulating erythrocytes assayed at stages 40, 41, 43, 45, and 49. the thymus mesonephros values were used distinguish donor host origin individual animals. results demonstrated that DLP gave rise a population stem colonized mesonephros, but not blood. VBI thymus, mesonephros. These experiments show there are two cell compartments amphibian embryo, separated both space time.