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[1]LI Yan-jie,LIU Ren-hua,YANG Jun-nian,et al.Dynamics of Enzyme Activities of Cynodon Dactylon Roots from Hydro-Fluctuation Belt in the Three Gorges Reservoir Area during Flooding[J].Research of Soil and Water Conservation,2014,21(03):288-292.

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Dynamics of Enzyme Activities of Cynodon Dactylon Roots from Hydro-Fluctuation Belt in the Three Gorges Reservoir Area during Flooding

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 21 Number of periods: 2014 03 Page number: 288-292 Column: Public date: 2014-06-28

Title:: Dynamics of Enzyme Activities of Cynodon Dactylon Roots from Hydro-Fluctuation Belt in the Three Gorges Reservoir Area during Flooding

Author(s):: LI Yan-jie^1,2, LIU Ren-hua¹, YANG Jun-nian¹, ZHOU Da-xiang¹, QIN Hong-wen¹; 1. College of Life Science and Engineering, Chongqing Three Gorges University, Chongqing 404000, China;
2. Research Centre for Sustainable Development, Three Gorges Reservoir Region, Chongqing 404000, China

Keywords:: hydro-fluctuation belt; submergence stress; Cynodon dactylon; enzyme activities

CLC:: Q948

DOI:: -

Abstract:: Screening suitable plants is the key to management of Three Gorges Reservoir Area, so exploring dynamics of anti-flooded enzyme activities of suitable Cynodon dactylon to flooding has the important significance for ecological management of hydro-fluctuation belt. With the water-level-fluctuation zone (XC) and non-water-level-fluctuation zone (FC) of Three Gorges Reservoir Area were chosen as the key research sites. Enzyme activities of anti-flooded of XC group to different water depth was studied by field sampling and comparative analysis. The results showed: ① MDA content of Cynodon dactylon root in the XC group increased with the increase of water depth, which showed deep submergence stress was aggravated; ② activitives of alcohol dehydrogenase (ADH), glutathione reductase (GR), peroxidase (POD), superoxide dismutase (SOD) and content of proline in the XC group increased, compared to the control; the peak activity of ADH, POD and SOD appeared in the 8 m water depth, and the peak activity of GR was in the 4 m water depth; ③ during the flooding period, Cynodon dactylon was in low metabolism and high energy storage since the content of starch was the same as control level and the content of soluble sugar decreased. The results showed that Cynodon dactylon was probably regarded as suitable species of management of hydro-fluctuation in Three Gorges Reservoir Area with respect to the physiological responses to flooding stress.

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