Fig. 4

Histogram of the Mean Relative Starch Percentage Values (MRSP) ± Standard Error. a E. timida specimens of the Spain fall population (MRSP on the first y axis, left side) at different starvation time points, 10 days, 21 days, 42 days and 88 days and their relative maximum quantum yield of PSII with a parabolic trend line (on the second y axis, right side). b MRSP ± standard error for each E. timida specimens of the Elba spring population represented as the histogram (MRSP on the first y axis, left side) at different starvation time points, 0 day, 3 days, 10 days, 21 days, and 30 days and their relative maximum quantum yield of PSII with a parabolic trend line represented by the line (on the second y axis, right side). Specimens under starvation conditions (S) are represented in green, while those in starvation and monolinuron treatment (S + M) at the same time points are represented in blue for both RSP and maximum quantum yield of PSII. Specimens for 0 day of starvation are the same S and for S + M and therefore are hatched with blue and green. The specimens treated with monolinuron under starvation have a zero relative starch percentage value