壳聚糖对盐胁迫下火鹤生理生化指标的影响

Effects of Chitosan on Physiological and Biochemical Characteristics of Anthurium scherzerianum under Salt Stress

为了明确壳聚糖(CTS)对火鹤耐盐性能力的影响,以火鹤幼苗为供试材料,分别用0.42、g/L的CTS喷雾处理火鹤叶片后,再以51、0 mmol/L的NaCl溶液分别进行胁迫处理,系统研究了壳聚糖对盐胁迫下火鹤叶片相对电导率、丙二醛(MDA)、可溶性蛋白、过氧化物酶(POD)、多酚氧化酶(PPO)5个生理生化指标的影响。结果表明:喷施CTS后能够提高幼苗叶片可溶性蛋白的含量和过氧化物酶(POD)、多酚氧化酶(PPO)的酶活性;有效降低叶片细胞脂质过氧化产物丙二醛(MDA)含量和相对电导率。

The changes of physiological and biochemical characteristics of the relative conductivity,soluble protein,malondialdehyde（MDA）,Peroxidase（POD）and Polyphenoloxidase（PPO）were tested systematically in Anthurium scherzerianum seedings＇ leaves under 5 mmol/L and 10 mmol/L salt stress treated with 0.4 g/L and 2 g/L of the chitosan,in order to confirm the effect of chitosan to the salt resistance mechanism of Anthurirm scherzerianum seedings.The results showed that chitosan could significantly increase the soluble protein content and POD and PPO activities in the leaves,and effectively decreased the content of the lipid peroxdation product MDA and the relative conductivity in the leaf cells.