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Effects on the Physiological and Biochemical Indices of the Dominatn Plant Ludwigia prostrata in the Riparian Zone of the Le’an River under the Simulated water flooding conditions(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
2019 06
Page:
1-11
Research Field:
Articles
Publishing date:

Info

Title:
Effects on the Physiological and Biochemical Indices of the Dominatn Plant Ludwigia prostrata in the Riparian Zone of the Le’an River under the Simulated water flooding conditions
Author(s):
ZHANG Guaiguai1 JIAN Minfei1 2** XIONG Xiaoying2 YU Houping2 & NI Cai-ying2
1 College of Life Science, Jiangxi Provincial Key Laboratory of Protection and Utilization of Subtropical Plant Resources, Jiangxi Normal University, Nanchang 330022, China;
2 Key Laboratory of Poyang Lake Wetland and Watershed Research, Ministry of Education, Jiangxi Normal University, Nanchang 330022, China
Keywords:
Ludwigia prostrate riparian zone chlorophyll anti-enzyme activity osmotic regulating substance malondialdehyde (MDA)
CLC:
-
PACS:
DOI:
10.19675/j.cnki.1006-687x.2019.02038
DocumentCode:

Abstract:
In order to explore the waterlogging mechanism and survival strategy of the riparian plants under the water flooding stress in the typical riparian zone of Le’an River, the dominant species Ludwigia prostrata (L. prostrate) were selected as the experimental materials and cultured in the laboratory with soil pot methods under the four different water flooding intensity stresses including control groups (CK), infiltration(INF) groups, half-flooded (HALF) groups and full submergence (FULL) groups. The changes in characteristics of chlorophyll, activities of anti-adversity enzymes indices, including superoxide dismutase(SOD), catalase(CAT), peroxidase (POD) and osmotic adjustment substances including soluble protein and soluble sugar, malondialdehyde (MDA) in the leaves of L. prostrate were determined. The results showed that the stress damage on L. prostrata gradually increased with the increasing intensity of the water flooding. After flooding for 28 days, the plants of L. prostrata still grew well in the INF groups but the plants of L. prostrata died in the FULL groups. The total chlorophyll contents in the leaves of L. prostrata in the INF groups and HALF groups had no significant differences in the short period of growth, but their total chlorophyll contents were significantly lower than those of the control groups (P < 0.05) in the long period of growth. The activities of SOD, POD and CAT increased firstly and then decreased with the increase of flooding time in the FULL groups; but the contents of CAT in the INF groups increased significantly by 41.6% (P < 0.05) compared with the control group after 28 days flooding. The contents of osmotic regulating substance and MDA in leaves of L. prostrata significantly increased under the waterlogging treatment, but all the above indices increased firstly and then decreased along with the increase of the flooding time. After 21 days of flooding, the contents of soluble protein, soluble sugar and MDA were reduced by 52.9%, 25.9% and 6.5% respectively compared with those of CK. In summary, L. prostrata is an herbaceous species with strong flood resistance through by increasing protective enzyme activity and the contents of osmotic regulation substances, but its growth under more intense flooding and longer flooding time could be still caused significant damage.

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Last Update: 2019-04-26