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Effect of Xanthomonas oryzae Infection on Chlorophyll Fluorescence Systemic of Bean Leaves(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2014年15期
Page:
112-115
Research Field:
Publishing date:

Info

Title:
Effect of Xanthomonas oryzae Infection on Chlorophyll Fluorescence Systemic of Bean Leaves
Author(s):
FENG Han-qing; JIAO Qing-song; TIAN Wu-ying; WU Fang-yi
College of Life Sciences,Northwest Normal University,Lanzhou,Gansu 730070
Keywords:
chlorophyll fluorescence; Xanthomonas oryzae; PSⅡ; systemic
PACS:
S643.1
DOI:
-
Abstract:
Taking Phaseolus vulgaris L. as material,the effect of the infection with Xanthomonas oryzae on the behaviors of photosystemⅡ(PSⅡ) in the infected area and in the noninfected area of the same bean (Phaseolus vulgaris L.) leaves were investigated by measuring their chlorophyll fluorescence parameters.The results showed that the values of maximal photochemical efficiency of PSⅡ(Fv/Fm),the maximal photochemical efficiency of light adaptation (Fv′/Fm′),and potential activity of PSⅡ（Fv/F0）were significantly decreased in both the infected area and the noninfected area of the same leaf,compared with those of the control.These observations suggest that the reaction centers and donor sides of PSⅡ were systemicly inhibited by Xanthomonas oryzae infection.The infection with Xanthomonas oryzae caused a significant increase of nonphotochemical quenching coefficient (NPQ and qN) and quantum yield of regulated energy dissipation ［Y(NPQ)］ but caused a decrease of the quantum yield of nonregulated energy dissipation ［Y(NO)］.These obervations suggest that the pathogen infection caused a systemic enhancement of the energy dissipation in the form of thermal of light energy and the protection capability of light reaction.All of these results indicated that the infection with Xanthomonas oryzae had a systemic impact on chlorophyll fluorescence characteristics of bean leaves.

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Last Update: 2014-09-21