it was observed that supplemented
N was always depleted earlier than supplemented C.
This means that all the cultures tested in the present study
occurred N-starvation. Due to respective different modes of
C and N supplements, the duration of N-starvation changed.
The no CeN-feeding culture underwent a continuous N-starvation
state from day 2 to the end of the cultivation. Due to
less frequency of N-feeding, the intermittent CeN-feeding
culture was in a relatively longer interval of discontinuous
N-starvation state than the successive CeN-feeding culture.