Effect of Different Fresh Water-logging Levels on the Physio-ecological Characteristics of Aegiceras corniculatum Seedlings
In order to investigate the response of mangrove plant to fresh water logging stress, Aegiceras corniculatumseedlings were cultivated in fresh water in Meizhou, Guangdong for 1 year to investigate the effect of different fresh water-logging levels on their physio-ecological characteristics. The 5 water depths were:0, 1/4, 2/4, 3/4 and 4/4, respectively. Results showed that: the 0, 1/4 and 2/4 groups had significant higher survival rate, height, stem diameter, branch number, leaf number, leaf area, root number, root length and root diameter than those of the 3/4 and 4/4 groups;the height increase showed a trend of 2/4>1/4>0>3/4>4/4, and the stem diameter increased a trend of 1/4>2/4>0>3/4>4/4;the biomass of the 0, 1/4 and 2/4 groups also were significantly higher than those of the 3/4 and 4/4 groups; SOD and POD activities in leaf and root increased significantly as water depth reached 2/4 and higher;the chlorophyll content, root activity and soluble sugar of the 0, 1/4 and 2/4 groups were significantly higher than those of the 3/4 and 4/4 groups, with a trend of decreasing with water depth;the seedlings of Aegicerascorniculatumgrew well at 3/4 water depth for 270 days, indicating a strong water logging tolerance. The physio-ecological characteristics revealed by this study indicated that Aegicerascorniculatumwas suitable for cultivation in shallows of rivers, lakes or reservoirs.
Aegicerascorniculatumseedlingsfresh water depthwater-logging stressphysio-ecological
NETL
NSTL
万方数据
维普
