Effects of turion size and water depth on germination and growth of an aquatic plant (Myriophyllum oguraense Miki subsp. yangtzense)

Figures & data

Figure 1. Mean (±SE) number of days to the first emergence (a), percent emergence (b), plant biomass (c), and plant height (d) of immature plants at different water depths (0, 20, 40, and 60 cm) for small (S), medium (M) and large (L) sized turions of M. oguraense subsp. yangtzense. Different superscript letters on each bar denote when significant differences were observed at p < 0.05 according to Duncan's multiple comparison test after ANOVA (n = 3).

Table 1. F-values and significance of two-way ANOVA of the effects of turion size and water depth on plant height, biomass, and biomass allocation ratio of M. oguraense subsp. yangtzense.

Dependent variable	Turion size (df = 2)	Water depth (df = 3)	Turion size × water depth (df = 6)
Plant height	326.97**	161.11**	4.04**
Plant biomass	431.72**	181.75**	2.08 ns
Relative root mass	4.13*	14.05**	0.93 ns
Relative stem mass	2.66 ns	1.97 ns	3.35**
Relative leaf mass	11.86**	23.77**	1.83 ns
Notes: ns indicates no significant difference; * and ** indicate significant difference among treatments at p < 0.05 and p < 0.01, respectively.

Figure 2. Biomass allocation at different water depths (0, 20, 40, and 60 cm) for small (S), medium (M) and large (L) sized turions of M. oguraense subsp. yangtzense (n = 3).