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Photosynthetica

, Volume 52, Issue 1, pp 148–151 | Cite as

Different responses of young and expanded lettuce leaves to fungicide Mancozeb: chlorophyll fluorescence, lipid peroxidation, pigments and proline content

  • M. C. Dias
  • P. Figueiredo
  • I. F. Duarte
  • A. M. Gil
  • C. Santos
Brief Communication

Abstract

This work aimed to study the effects of commercial doses of the fungicide, Mancozeb, on the photosynthetic apparatus of lettuce young leaves (YL) and expanded leaves (EL). Seven days after Mancozeb application, chlorophyll a fluorescence, pigment contents, lipid peroxidation, and proline content were evaluated. Independently of leaf age, Mancozeb treatment reduced the efficiency of photosystem II photochemistry, increased the nonphotochemical quenching and proline content, decreased pigment contents, and induced lipid peroxidation. Moreover, EL showed a more stable photosynthetic apparatus, less prone to oxidative damages compared with YL. The parameters measured proved to be good markers for the rapid and preliminary diagnosis of fungicide toxicity.

Additional key words

anthocyanins dithiocarbamates photosynthetic efficiency toxicity 

Abbreviations

C

control

Chl

chlorophyll

DM

dry mass

EL

expanded leaves

Fv/Fm

maximal efficiency of PSII

MDA

malondialdehyde

NPQ

nonphotochemical quenching

PSII

photosystem II

qP

photochemical quenching

ROS

reactive oxygen species

YL

young leaves

ϕPSII

effective quantum efficiency of PSII

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Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  • M. C. Dias
    • 1
  • P. Figueiredo
    • 2
  • I. F. Duarte
    • 2
  • A. M. Gil
    • 2
  • C. Santos
    • 1
  1. 1.Department of Biology & CESAMUniversity of AveiroAveiroPortugal
  2. 2.CICECO & Department of ChemistryCampus Universitário de Santiago, University de AveiroAveiroPortugal

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