Respiration rate (mg O₂ · g^-1 dry mass · h^-1) in entire individual <i>A</i>. <i>philoxeroides</i> plants.

<p>The plants were exposed to three different treatments for 10 days (0–10 d): 1) well drained and illuminated (control, black and closed circles), 2) submergence in darkness (white and open circles) or 3) non-submergence in darkness (triangles). From 10 d on, the plants were exposed to the normal growth conditions experienced by the control plants. The data are presented as the means ± SE, n = 5. For clarity, the statistical significance is shown only for the differences between the submergence/darkness and non-submergence/darkness at each sampling time. *, P < 0.05.