abnormal nuclear envelope morphology during vegetative growth nuclear membrane blebbing A physical cellular phenotype observed in the vegetative growth phase of the life cycle in which one or both nuclear membrane(s) form blebs. Membrane blebbing usually leads to decreases in nuclear size and the nucleus:cytoplasm volume ratio. FYPO:0006928 nuclear membrane blebbing during vegetative growth midori 2019-06-17T13:27:53Z nuclear envelope blebbing nuclear membrane blebbing during mitotic cell cycle