水淹对铺地黍部分生理指标的影响

Effect of flooding on some physiological indexes of Panicum repens

关键词:  铺地黍  水淹  生理指标  消落带

Key words:  Panicum repens  flooding  physiological indexes  water fluctuating zone

摘要:

研究了水淹对铺地黍幼苗的丙二醛、可溶性糖和可溶性蛋白质含量，3种抗氧化保护酶（SOD、CAT和POD）活性等生理指标的影响。结果显示：水淹胁迫下，铺地黍幼苗的丙二醛含量缓慢升高，可溶性糖含量先升高后下降，蛋白质含量逐渐下降，超氧化物歧化酶(SOD)和过氧化氢酶(CAT)活性先上升后下降，而过氧化物酶(POD)活性则持续上升。研究结果表明：水淹对铺地黍的生理指标产生了的影响，其中抗氧化保护酶活性的提高是铺地黍适应水淹环境的重要原因之一。

Abstract:

Effects of flooding stress on the contents of malondialdehyde(MDA)，soluble sugars and proteins from young Panicum repens，and the activities of three protective enzymes in leaves were studied. The results showed that distinct changes of their contents were induced by the flooding conditions:the contents of MDA slowly ascended；while the soluble sugars first increased and then decreased；and the soluble protein descended gradually. We also observed that the activities of superoxide dismutase(SOD)and catalase(CAT)fell after rising，but the activity of peroxidase(POD)always went up. Together，these results suggested that flooding had an impact on physiological indexes of P.repens，and the plant could effectively adapt to the flooding environment by rising the activities of protective enzymes.