The physiological adaptability of Carex cinerascens to different water level environments

Water level is an important factor affecting the growth, development and reproduction of wetland plants. To clarify the effects of different water levels on the physiological characteristics of Carex cinerascens, the indoor pot method is used to set up three types of water environment: rising, falling and stable. Seven test treatments, including 8 cm(0.2 cm/d), 16 cm(0.4 cm/d), 24 cm(0.6 cm/d), 32 cm(0.8 cm/d), 40 cm(1.0 cm/d), 48 cm(1.2 cm/d), and 56 cm(1.4 cm/d) were set for each types of water environment, taking 0 cm water level as a control, the test time lasted 40 days. The indexes of antioxidant enzyme activity, osmotic adjustment substance content, malondialdehyde content and superoxide anion production rate of C. cinerascens under different water levels were analyzed. The results showed that 1) in the stable water level, the superoxide anion production rate, osmotic adjustment substance and antioxidant enzyme activity were significantly different from the control group at 8 cm and 16 cm flooding dept