{"refrec":{"BRefID":257312,"RR":"<b>Xie, X.; Gu, W.; Gao, S.; Lu, S.; Li, J.; Pan, G.; Wang, G.; Shen, S.</b> (2013). Alternative electron transports participate in the maintenance of violaxanthin de-epoxidase activity of <i>Ulva</i> sp. under low irradiance. <i>PLoS One 8(11)</i>: e78211. <a href=\"http://dx.doi.org/10.1371/journal.pone.0078211\" target=\"_blank\">dx.doi.org/10.1371/journal.pone.0078211</a>","BEntID":249321,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>PLoS One 8(11)</i>: e78211. <a href=\"https://dx.doi.org/10.1371/journal.pone.0078211\" target=\"_blank\">https://dx.doi.org/10.1371/journal.pone.0078211</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Xie, X.; Gu, W.; Gao, S.; Lu, S.; Li, J.; Pan, G.; Wang, G.; Shen, S.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Xie, X. <i>et al.</i>","Englishabstract":"The xanthophyll cycle (Xc), which involves violaxanthin de-epoxidase (VDE) and the zeaxanthin epoxidase (ZEP), is one of the most rapid and efficient responses of plant and algae to high irradiance. High light intensity can activate VDE to convert violaxanthin (Vx) to zeaxanthin (Zx) via antheraxanthin (Ax). However, it remains unclear whether VDE remains active under low light or dark conditions when there is no significant accumulation of Ax and Zx, and if so, how the ?pH required for activation of VDE is built. In this study, we used salicylaldoxime (SA) to inhibit ZEP activity in the intertidal macro-algae <i>Ulva</i> sp. (Ulvales, Chlorophyta) and then characterized VDE under low light and dark conditions with various metabolic inhibitors. With inhibition of ZEP by SA, VDE remained active under low light and dark conditions, as indicated by large accumulations of Ax and Zx at the expense of Vx. When PSII-mediated linear electron transport systems were completely inhibited by SA and DCMU, alternative electron transport systems (i.e., cyclic electron transport and chlororespiration) could maintain VDE activity. Furthermore, accumulations of Ax and Zx decreased significantly when SA, DCMU, or DBMIB together with an inhibitor of chlororespiration (i.e., propyl gallate (PG)) were applied to <i>Ulva</i> sp. This result suggests that chlororespiration not only participates in the build-up of the necessary ?pH, but that it also possibly influences VDE activity indirectly by diminishing the oxygen level in the chloroplast.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Alternative electron transports participate in the maintenance of violaxanthin de-epoxidase activity of <i>Ulva</i> sp. under low irradiance","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:01.897972","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2013,"MonPub":null,"DateUpdate":"2016-06-06","DateCreate":"2016-05-29","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000327216200014","VABBcode":null,"OpenAcc":1,"DOI":"10.1371/journal.pone.0078211"},"refs":null,"anarec":{"AnaID":257312,"PubliDate":2013,"Pagination":"e78211","XtraPublOfAnaID":null,"ISBN":null,"Volume":"8","Issue":"11","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":123954,"SerRR":"PLoS One. 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