has_part exists_during inheres_in long microtubules long polar microtubules long polar microtubules during vegetative growth midori 2014-11-19T15:05:50Z long polar microtubules during mitotic cell cycle elongated polar microtubules FYPO:0004021 A physical cellular phenotype observed in the vegetative growth phase of the life cycle in which cells form polar microtubules that are longer than normal. Polar microtubules are the spindle microtubules that come from each pole and overlap at the spindle midzone.