Study of the tolerance of Hippochaete ramosissimum to Cu stress.
We investigated the tolerance of Hippochaete ramosissimum and the changes in physiological metabolism following exposure to copper using pot experiments and analyzing plant physiology and biochemistry. The results showed that Cu tolerance in Hippochaete ramosissimum varied significantly between different populations; the tolerance of plants living in Cu polluted areas for extended periods of time exceeded that of plants living in unpolluted areas. SOD and POD activities in highly Cu tolerant plants increased noticeably following exposure to Cu. This indicates that maintaining and increasing the two kinds of protective enzyme activities are the primary foundations of plant tolerance. However, no change in CAT activity was demonstrated following Cu exposure. In summary, there existed considerable differences in physiological metabolism between different populationsof Hippochaete ramosissimum following exposure to Cu.
Liu
Dengyi
D
Biodiversity Research Center, Anhui Normal University, Wuhu 241000, China. ldy@mail.ahnu.edu.cn
Li
Ying
Y
Chu
Ling
L
Wang
Guanglin
G
Wang
Lilong
L
D000222:Adaptation, Physiological; D018533:Biomass; D002374:Catalase / Q000378:metabolism; D002462:Cell Membrane / Q000187:drug effects / Q000378:metabolism; D002734:Chlorophyll / Q000378:metabolism; D003300:Copper / Q000633:toxicity*; D004305:Dose-Response Relationship, Drug; D008315:Malondialdehyde / Q000378:metabolism; D009005:Monosaccharides / Q000378:metabolism; D009994:Osmolar Concentration; D009195:Peroxidase / Q000378:metabolism; D063245:Plant Development; D018517:Plant Roots / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D010944:Plants / Q000187:drug effects* / Q000378:metabolism; D013482:Superoxide Dismutase / Q000378:metabolism
D009005:Monosaccharides; D002734:Chlorophyll; D008315:Malondialdehyde; D003300:Copper; D002374:Catalase; D009195:Peroxidase; D013482:Superoxide Dismutase