Area covered by a group of chemotactic cells converging toward the same aggregation center. Can reach a diameter of up to 1 cm.
First adherent mass of cells observed during development, relatively flat with indistinct borders.
Hemispherical structure composed of post-aggregative cells that are undergoing differentiation.
Hemispherical structure composed of post-aggregative cells that are undergoing differentiation and that have formed a tip.
Cylindrical structure that is formed by elongation of the mound under the control of the tip. The elongating tip is called the first finger.
When the conditions are not optimal for the completion of development, the standing slug bends from a vertical position to a horizontal position, producing a migratory that slug has the ability to migrate towards more favorable environmental conditions. The slug is cylindrical in shape with a rounded, tapering region at its anterior end that is raised with respect to the substratum. It usually measures between 0.8 to 1.2 mm in length with a diameter of 0.15 to 0.25 mm. Slugs sense and respond to light, temperature and acidity, and do not enter culmination until the conditions are optimal. The slug can move at a speed of 0.5 to 2 mm per hour. A trail of slime is deposited on the surface during migration.
Structure formed after the arrest of slug migration formed when cells of the posterior region of the slug move under the tip. Stalk tube formation is initiated at this stage.
Structure in which stalk tube formation has progressed down the prespore zone. Basal disc formation begins at this stage, with the migration of pstA and pstB cells to the lower part of the culminant to form the basal disc.
Structure in which stalk tube formation has progressed down to the basal disc. The sorogen ascents up the stalk to it apical position during this stage. Terminal differentiation occurs at this stage: death of the stalk cells and encapsulation of the spores.
Dicty asexual organism which is terminally differentiated and consists of a long stalk on top of which sits the sorus that contains spores. The mature fruiting body measures between 1.5 to 3 mm in height.
Macroscopic appearance of groups of chemotactic cells orienting themselves in a head to tail fashion as they are migrating in the direction of the chemotactic stimulus to form aggregates.
Elongated protusion of the tipped mound located on top of the cell mass that contains pstA cells flanked by pstO cells (expressing ecmA from the proximal and the distal part of its promoter, respectively).
Region of the tipped mound mostly composed of prespore cells. In addition to prespore cells, the prespore region contains anterior-like cells (ALC) that express ecmA and/or ecmB.
Elongated protrusion of the standing slug located on top of the cell mass that contains pstA cells flanked by pstO cells (expressing ecmA from the proximal and the distal part of its promoter, respectively).
Most apical region of the prestalk zone of the standing slug characterized by high expression of the ecmA gene directed by the proximal part of its promoter (ecmA promoter).
Cone-shaped area of the prestalk zone of the standing slug that occupies a core among the pstA region. Cells of the pstAB region express both the ecmA and ecmB genes.
prestalk AB core region of the standing slug
Region of the standing slug mostly composed of prespore cells. In addition to prespore cells, the prespore region contains anterior-like cells (ALC) that express ecmA and/or ecmB. The prespore region occupies about three quarters of the organism.
Region of the standing slug in contact with the substratum and composed of prestalk B cells.
The prestalk region of the migratory slug is located at the anterior of the organism. It consists of about one quarter of the cells.
Anterior-most region of the prestalk zone of the migratory slug and characterized by high expression of the ecmA gene directed by the proximal part of its promoter (ecmA promoter).
prestalk AO region of the migratory slug
Cone-shaped area of the prestalk zone of the migratory slug that occupies a core among the pstA region. Cells of the pstAB region express both the ecmA and ecmB genes.
prestalk AB region of the migratory slug
prestalk AB core region of the migratory slug
Region of the migratory slug composed mostly of prespore cells. In addition to prespore cells, the prespore region contains anterior-like cells (ALC) that express ecmA and/or ecmB. The prespore region occupies about three quarters of the organism.
The prestalk region of the early culminant is located at the most apical part of the organism. It consists of about one quarter of the cells.
Anterior-most region of the prestalk zone of the early culminant characterized by high expression of the ecmA gene directed by the proximal part of its promoter (ecmA promoter).
prestalk A region of the early culminant
Cone-shaped area of the prestalk zone of the early culminant that occupies a core among the pstA region. Cells of the pstAB region express both the ecmA and ecmB genes.
prestalk AB region of the early culminant
prestalk AB core region of the early culminant
Region of the early culminant mostly composed of prespore cells. In addition to prespore cells, the prespore region contains anterior-like cells (ALC) that express ecmA and/or ecmB. The prespore region occupies about three quarters of the organism.
Region of the early culminant located at the closest to the substratum composed of pstB cells that originated from rearguard cells.
The prestalk region of the mid culminant is located at the most apical part of the organism. It consists of about one quarter of the cells.
Anterior-most region of the prestalk zone of the mid culminant characterized by high expression of the ecmA gene directed by the proximal part of its promoter (ecmA promoter).
Cone-shaped area of the prestalk zone of the mid culminant that occupies a core among the pstA region. Cells of the pstAB region express both the ecmA and ecmB genes.
prestalk AB core region of the mid culminant
Tubular structure of the mid culminant that consists of cellulose-covered cells stacked on top of each other and surrounded by an acellular stalk tube composed of cellulose and glycoprotein.
Synonym from Kessin book p. 12-13; Kessin book p. 193.
Region of the mid culminant mostly composed of prespore cells. In addition to prespore cells, the prespore region contains anterior-like cells (ALC) that express ecmA and/or ecmB. The prespore region occupies about three quarters of the organism.
Region located of the mid culminant located closest to the substratum and composed of pst cells (rearguard cells).
Tubular structure of the late culminant that consists of cellulose-covered cells stacked on top of each other and surrounded by an acellular stalk tube composed of cellulose and glycoprotein.
Synonym from Kessin book p. 12-13, Kessin book p. 193.
Ovoid structure of the late culminant supported by the stalk and that contains the spores.
Conical-shaped structure of the late culminant that anchors the stalk to the substratum. Composed of anterior-like cells.
Central portion of the basal disc of the late culminant. Composed of stalk cells.
Tubular structure of the fruiting body that consists of cellulose-covered cells stacked on top of each other and surrounded by an acellular stalk tube composed of cellulose and glycoprotein. The stalk of the mature fruiting body is usually 5-15 microns in diameter and between 1.5 to 3 cm in height.
Structure of the fruiting body supported by the stalk and that contains the spores. The sorus is 125-300 microns in diameter, lemon-shaped, and grayish white to pale yellow in color.
Conical-shaped structure of the fruiting body that anchors the stalk to the substratum, around 150 to 400 microns in diameter. Composed of anterior-like cells.
Central portion of the basal disc of the fruiting body composed of stalk cells.
Cell that is an individual member of the species Dictyostelium discoideum.
Dictyostelium discoideum single cell organism
Region mostly composed of prespore cells. In addition to prespore cells, the prespore region contains anterior-like cells (ALC) that express ecmA and/or ecmB. The prespore region occupies about three quarters of the organism.
The prestalk region is located at the most apical part of the organism. It consists of about one quarter of the cells.
Anterior-most region of the prestalk zone characterized by high expression of the ecmA gene directed by the proximal part of its promoter (ecmA promoter).
Conical-shaped structure that anchors the stalk to the substratum. Composed of anterior-like cells.
Cone-shaped area of the prestalk zone that occupies a core among the pstA region. Cells of the pstAB region express both the ecmA and ecmB genes.
Tubular structure that consists of cellulose-covered cells stacked on top of each other and surrounded by an acellular stalk tube composed of cellulose and glycoprotein.
Ovoid structure supported by the stalk and that contains the spores.
Central portion of the basal disc. Composed of stalk cells.
Anterior-most region of the prestalk zone of the tipped mound characterized by high expression of the ecmA gene directed by the proximal part of its promoter (ecmA promoter).
Cone-shaped area of the prestalk zone of the tipped mound that occupies a core among the pstA region. Cells of the pstAB region express both the ecmA and ecmB genes.
prestalk AB core region of the tipped mound
Region of the early pseudoplasmodium located at the closest to the substratum composed of pstB cells.
Anatomical structure that has as its parts a maximally connected cell compartment surrounded by a plasma membrane.
Starved cell that secretes and responds to chemoattractants (cAMP).
Differentiating cell composing the aggregate that has acquired adhesive properties.
Cell that is undergoing differentiation to become a spore. Characterized by the presence of prespore vesicles (PV).
Cell that is undergoing differentiation to become a stalk cell and characterized by the ability to update vital dyes. Represents about one-quarter of the cells. During development, prestalk cells are located in the anterior portion of the organism.
Cell that is undergoing differentiation to become a stalk cell. pstA cells express the ecmA marker from a promoter region that is proximal to the ATG (ecmAO promoter). They are located at the anterior-most region of the slug. During culmination pstA cells differentiate into pstAB cells.
Cell that is undergoing differentiation to become a stalk cell. pstAB cells express both ecmA and ecmB either simultaneously or sequentially. During culmination pstA differentiate into pstAB cells.
Cell of polyhedric shape filling the stalk tube. Stack cells are large (around 8 microns in diameter), highly vacuolated, and are surrounded by cell wall composed of cellulose. Stalk cells die upon terminal differentiation. Their role is to provide structural support for the fruiting body.
Dormant cell protected by a tri-layer spore coat. The spore has an elliptical shape and is approximately 6-9 microns by 3 microns.
Material anatomical entity that has inherent 3D shape and is generated by coordinated expression of the Dictyostelium discoideum genome.
Dictyostelium discoideum anatomical structure
Anatomical structure that is an individual member of the Dictyostelium discoideum species and consists of more than one cell.
Anatomical structure which is a primary subdivision of whole Dictyostelium organism. The mereological sum of these is the whole organism.