Photochemical changes and oxidative damage in the aquatic macrophyte Cymodocea nodosa exposed to paraquat-induced oxidative stress
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- 作者：Michael Moustakasa ; b ; moustak@bio.auth.gr" class="auth_mail" title="E-mail the corresponding author ; Paraskevi Maleaa ; Aristi Zafeirakogloua ; Ilektra Sperdoulia
- 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
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Short-term (2 h) exposure to 200 μM paraquat resulted in the maximum H2O2 production.
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The highest effective quantum yield of PSII (ΦPSII) was linked with the highest H2O2 production.
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Non-photochemical quenching (NPQ) was inefficient as a protective mechanism to paraquat in Cymodocea.
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A threshold concentration (200 μM) was required for induction of paraquat tolerance.
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Chlorophyll fluorescence imaging revealed herbicide toxicity effects in aquatic plants.