摘要
通过模拟实验,研究了巢湖地区芦苇对淹水胁迫的适应能力及其恢复机理。结果表明:随着淹水深度的增加(20-90 cm),实验组的芦苇株高不断减少,分蘖数不断减少,鲜重增长量和干重增长量不断减少,而实验结束后芦苇地下生物量所占的比例不断小幅增大。淹水时间越长,芦苇叶绿素、蛋白质含量、株高、分蘖数、生物量与对照组相比的绝对增量越小。在淹水初期,芦苇丙二醛(MDA)含量,超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)活性显著增大;淹水处理第30天,随着淹水深度的加深,SOD、POD和CAT不断减少;在淹水20 cm的恢复期,叶绿素含量、可溶性蛋白含量小幅增大,芦苇SOD、POD和CAT活性显著增大。在巢湖湿地生态系统中,20-40 cm是芦苇生长的适宜淹水深度;而淹水初期芦苇对高淹水深度表现出强烈的抗逆性,30天后芦苇已经适应了淹水胁迫。
Under laboratory conditions,the adaptability and recovery mechanism of Phragmites australis to flooding stress were investigated in Chaohu Lake Area.The results showed that:With the increase of flooding depth(20-90 cm),the plant height,tiller number,fresh weight and dry weight of Phragmites australis in the experimental group decreased,while the proportion of underground biomass of Phragmites australis increased slightly after the experiment.The chlorophyll,protein content,plant height,tiller number and biomass of Phragmites australis decreased with the longer waterlogging time compared with the control group.At the early stage of flooding,MDA content,SOD,POD and CAT activities of Phragmites australis increased significantly,on the 30th day of flooding treatment,SOD,POD and CAT decreased with the deepening of flooding depth.In the recovery stage of 20 cm of flooding,chlorophyll content and soluble protein content increased slightly,while SOD,POD and CAT activities increased significantly.In the wetland ecosystem of Chaohu Lake,the suitable flooding depth for Phragmites australis growth was 20-40 cm.In the early stage of flooding,Phragmites australis showed strong resistance to high flooding depth,and 30 days later,Phragmites australis had adapted to flooding stress.
作者
尹程
高源
张祥霖
刘丹丹
YIN Cheng;GAO Yuan;ZHANG Xiang-lin;LIU Dan-dan(School of Hydraulic Engineering,Anhui Technical College of Water Resources and Hydroelectric Power,Hefei,231603,Anhui;Shandong Key Laboratory of Eco-Environmental Science for Yellow River Delta,Binzhou,256603,Shandong)
出处
《蚌埠学院学报》
2022年第5期122-128,共7页
Journal of Bengbu University
基金
安徽高校自然科学研究重点项目(KJ2017A598,KJ2017A604)。
关键词
淹水胁迫
芦苇
生长状态
生理生态
巢湖
flooding stress
Phragmites australis
growth state
physiological ecology
Chaohu Lake
