One of the plant nodes function (Poaceae, but almost all other plants) is the leveling of deviations from vertical direction of growth, this is done by their enlargement at the point, which is the opposite to the deviation from the vertical direction (drawing) and the change is irreversible (this is done by the increasing the number of cells, not their size and shape).
Moja ya kazi kupanda nodes (Poaceae, lakini karibu mimea yote mengine) na pia kama leveling ya deviations kutoka mwelekeo wima ya ukuaji, hii ni kufanyika kwa utvidgningen yao katika hatua, ambayo ni kinyume na kupotoka kutoka mwelekeo wima (drawing) Na mabadiliko ni Malena (hii ni kufanyika kwa Kuongeza idadi ya seli ukubwa, si yao na sura).