Photochemical changes and oxidative damage in the aquatic macrophyte Cymodocea nodosa exposed to paraquat-induced oxidative stress

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Photochemical changes and oxidative damage in the aquatic macrophyte Cymodocea nodosa exposed to paraquat-induced oxidative stress

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作者：Michael Moustakas^a ; ^b ; ^{moustak@bio.auth.gr" class="auth_mail" title="E-mail the corresponding author} ; Paraskevi Malea^a ; Aristi Zafeirakoglou^a ; Ilektra Sperdouli^a
关键词：AL ; actinic light ; AOI ; areas of interest ; Chl ; chlorophyll ; ETR ; electron transport rate ; Fv/Fm ; maximal photosystem II quantum yield ; H2O2 ; hydrogen peroxide ; NPQ ; non-photochemical quenching ; O2&bull ; &minus ; superoxide anion ; PSI ; PSII ; photosystem I ; photosystem II ; PPFD ; photosynthetic photon flux density ; Pq ; paraquat ; QA ; quinone A ; primary stable electron acceptor of PSII ; qp ; photochemical quenching ; ROS ; reactive oxygen species ; ΦNO ; quantum yield of non-regulated energy loss in PSII
刊名：Pesticide Biochemistry and Physiology
出版年：2016
出版时间：January 2016
年：2016
卷：126
期：Complete
页码：28-34
全文大小：1258 K

文摘

•: Short-term (2 h) exposure to 200 μM paraquat resulted in the maximum H₂O₂ production.
•: The highest effective quantum yield of PSII (Φ_PSII) was linked with the highest H₂O₂ production.
•: Non-photochemical quenching (NPQ) was inefficient as a protective mechanism to paraquat in Cymodocea.
•: A threshold concentration (200 μM) was required for induction of paraquat tolerance.
•: Chlorophyll fluorescence imaging revealed herbicide toxicity effects in aquatic plants.

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