Cell size control in microorganisms

Microorganisms in all kingdoms of life face a challenge of regulating the size and shape of their cells control of which is essential for their viability For decades a popular hypothesis has been that cells can measure their absolute size and that reaching a critical size triggers the division process This would imply that a cell that was born smaller than average will not be smaller than average when it divides b in contrast to experiments showing that such correlations exist and that size is