|Table of Contents|

Research on Chlorophyll Fluorescence Characteristics of Trapa Bicornis Leaves Under the Stress of H2O2(PDF)

南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2013年03期
Page:
67-72
Research Field:
Publishing date:

Info

Title:
Research on Chlorophyll Fluorescence Characteristics of Trapa Bicornis Leaves Under the Stress of H2O2
Author(s):
Ji Yingxue1; 2; Wang Fenghe2; Zhang Fan1; 2; Duan Lunchao2; Wang Guoxiang2; Gu Zhongzhu1
(1.School of Energy and Mechanical Engineering,Nanjing Normal University,Nanjing 210042,China) (2.Department of Environmental Science and Engineering,Nanjing Normal University,Nanjing 210023,China)
Keywords:
H2O2; trapa bicornis leaves; Chlorophyll fluorescence characteristic parameters; photosynthesis
PACS:
S601; X524
DOI:
-
Abstract:
Using the technology of chlorophyll fluorescence kinetics,the paper studies the negative effect of H2O2 on the photosynthesis of trapa bicornis leaves.According to the measurements and analyses of the maximum photochemical quantum yield(Fv/Fm),the apparent photosynthetic electron transfer rate(ETR),the photosynthetic active radiation intensity(PAR),the quenching photochemical coefficient(qP)and the non-quenching photochemical coefficient(NPQ)of trapa bicornis leaves under the action of H2O2 with different concentrations for 48 h,the results indicates that H2O2 can influence the photosynthesis of trapa bicornis leaves,and that the degree of inhibition is related to the concentration of H2O2 and the contact time between them.With the increase in the concentration of H2O2,Fv/Fm overall shows a descending trend,Fm,qP drops while F0 rises,which indicate that the reaction center of light systemII in the plant has been destroyed,and that the higher the concentration is,the more serious it will be.The trapa bicornis leaves treated by H2O2 with high concentration(≥6 mg/L)appear dead within 24 h while those treated by H2O2 with low concentration(≤4 mg/L)appear dead within 48 h.The abnormal changes of some data are related to the decomposition properties of H2O2 in the water.

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Last Update: 2013-09-30