Our study further demonstrates the importance of the shape of colonies on setting their expansion.
Cells switched heritably, reversibly, and at a high frequency between four phenotypes readily distinguishable by the shape of colonies formed on agar at 25 °C.
The isolate VB976100 was cultured under biosafety level 3 conditions and the typical shape of colonies was seen on Ashdown-Agar [ 10] after 72 h.
Phenotype of all mutants was similar to wild-type cells in terms of size, colour, and the shape of colonies during cultivation on solid medium and in terms of the growth rate in liquid bubbling cultures under standard growth conditions.
By visualization, these strains were varied in colony shape, color of colony, and levels of growth on solid MBS medium.
The shapes of colonies vary widely, depend on the pattern of budding by which they grow, the variety of zooids present and the type and amount of skeletal material they secrete.
Interestingly, the mESCs plated on mouse embryonic fibroblast (MEF) feeder cells exhibited various shapes of colonies ranging from very round to somewhat flattened (Fig. S2E, F), corresponding to heterogeneous expression levels of Oct3/4::GFP (Fig. S2E', Fig.
In contrast, W4 mESCs cultured on the rigid dishes for the same duration, even in the presence of LIF, exhibit irregular shapes of colonies with some differentiated cells at the periphery of the colony and with low levels of AP activity and Oct3/4 expression (Fig. S4, row 1).
Various characteristics of bacterial colonies, such as colony matrices or shapes of colonies, govern the interaction between incident light and the colonies resulting in different scattering patterns (signatures) [ 18].
Identification is largely based on an accurate analysis of the macro- and microscopic features of the colonies: the size, color and shape of the colony, microscopic visualization of conidiophores and conidial heads, morphology size and color of the conidia are important features useful to identify the isolate at the species level [ 34, 36].
The transition from exponential to linear growth also affected the shape of the colony.
