Fig. 4

Biomass production traits of P. australis depending on day length and wind speed (n = 6, mean ± 1SE). (a) AGDW, (b) BGDW, (c) TDW, (d) rhizome DW, (e) root DW, (f) AGDW:BGDW; AGDW, above-ground dry weight; BGDW, below-ground dry weight; TDW, total dry weight; DW, dry weight; SD, short day with wind speed 0 m/s; SDW, short day with wind speed 4 m/s; LD, long day with wind speed 0 m/s; LDW, long day with wind speed 4 m/s. Different alphabets indicate statistically different subgroups by Duncan’s post hoc test (p < .05). In the cases of (e) root DW and (f) AGDW:BGDW, different sub-groups were statistically divided by Duncan’s post hoc test with a different significance level, p < 0.1