Magnesium deficiency–induced impairment of photosynthesis in leaves of fruiting Citrus reticulata trees accompanied by up‐regulation of antioxidant metabolism to avoid photo‐oxidative damage
Identifieur interne : 001909 ( Istex/Corpus ); précédent : 001908; suivant : 001910Magnesium deficiency–induced impairment of photosynthesis in leaves of fruiting Citrus reticulata trees accompanied by up‐regulation of antioxidant metabolism to avoid photo‐oxidative damage
Auteurs : Ning Tang ; Yan Li ; Li-Song ChenSource :
- Journal of Plant Nutrition and Soil Science [ 1436-8730 ] ; 2012-10.
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- KwdEn :
Abstract
Limited data are available on the physiological responses of leaves from fruiting trees to magnesium (Mg) deficiency. Magnesium deficiency–induced effects on photosystem II (PSII) photochemistry in leaves of fruiting (Citrus reticulate cv. Ponkan) trees were assessed by the chlorophyll a fluorescence (OJIP) transient. Magnesium deficiency decreased leaf CO2 assimilation and carbohydrates, but had no effect on intercellular CO2 concentration. Activity of ribulose‐1,5‐bisphosphate carboxylase/oxygenase (Rubisco) and concentrations of Chlorophyll (Chl) and carotenoids (Car) decreased to a lesser extent than CO2 assimilation. Chlorophyll a fluorescence transient from Mg‐deficient leaves had increased O step and decreased P step, accompanied by positive ΔL, ΔK, ΔJ, and ΔI bands. Magnesium deficiency decreased maximum quantum yield of primary photochemistry (Fv/Fm), quantum yield of electron transport from Q<$>_A^‐<$> to the photosystem I (PSI) end electron acceptors (φR0), maximum amplitude of IP phase and total performance index (PItot, abs), but increased deactiviation of oxygen‐evolving complex (OEC) and energy dissipation. Magnesium‐deficient leaves had higher or similar activities of antioxidant enzymes except for lower catalase (CAT) activity, higher or similar concentrations of antioxidant metabolites, and a higher ratio of Car : Chl. Magnesium‐deficiency did not affect concentration of malondialdehyde (MDA) and ratios of ascorbate (ASC) to ASC + dehydroascorbate (DHA) and reduced glutathione (GSH) to GSH + oxidized glutathione (GSSG). In conclusion, Mg deficiency–induced impairment of the whole photosynthetic electron transport chain may be the main factor contributing to decreased CO2 assimilation. Enhanced energy dissipation and antioxidant metabolism provide sufficient protection to Mg‐deficient leaves against photo‐oxidative damage.
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DOI: 10.1002/jpln.201100329
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Magnesium deficiency–induced effects on photosystem II (PSII) photochemistry in leaves of fruiting (Citrus reticulate cv. Ponkan) trees were assessed by the chlorophyll a fluorescence (OJIP) transient. Magnesium deficiency decreased leaf CO2 assimilation and carbohydrates, but had no effect on intercellular CO2 concentration. Activity of ribulose‐1,5‐bisphosphate carboxylase/oxygenase (Rubisco) and concentrations of Chlorophyll (Chl) and carotenoids (Car) decreased to a lesser extent than CO2 assimilation. Chlorophyll a fluorescence transient from Mg‐deficient leaves had increased O step and decreased P step, accompanied by positive ΔL, ΔK, ΔJ, and ΔI bands. Magnesium deficiency decreased maximum quantum yield of primary photochemistry (Fv/Fm), quantum yield of electron transport from Q<$>_A^‐<$> to the photosystem I (PSI) end electron acceptors (φR0), maximum amplitude of IP phase and total performance index (PItot, abs), but increased deactiviation of oxygen‐evolving complex (OEC) and energy dissipation. Magnesium‐deficient leaves had higher or similar activities of antioxidant enzymes except for lower catalase (CAT) activity, higher or similar concentrations of antioxidant metabolites, and a higher ratio of Car : Chl. Magnesium‐deficiency did not affect concentration of malondialdehyde (MDA) and ratios of ascorbate (ASC) to ASC + dehydroascorbate (DHA) and reduced glutathione (GSH) to GSH + oxidized glutathione (GSSG). In conclusion, Mg deficiency–induced impairment of the whole photosynthetic electron transport chain may be the main factor contributing to decreased CO2 assimilation. Enhanced energy dissipation and antioxidant metabolism provide sufficient protection to Mg‐deficient leaves against photo‐oxidative damage.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>Ning Tang</name><affiliations><json:string>College of Resources and Environmental Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China</json:string><json:string>Institute of Horticultural Plant Physiology, Biochemistry and Molecular Biology, Fujian Agriculture and Forestry University, Fuzhou 350002, China</json:string><json:string>Present address: Bioengineering College, Chongqing University, Chongqing 400044, China</json:string></affiliations></json:item><json:item><name>Yan Li</name><affiliations><json:string>College of Resources and Environmental Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China</json:string></affiliations></json:item><json:item><name>Li‐Song Chen</name><affiliations><json:string>College of Resources and Environmental Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China</json:string><json:string>E-mail: lisongchen2002@hotmail.com</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>chlorophyll a fluorescence (OJIP) transient</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Citrus reticulata</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>photosystem</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>ribulose‐1,5‐bisphosphate carboxylase/oxygenase</value></json:item></subject><articleId><json:string>JPLN201100329</json:string></articleId><language><json:string>eng</json:string></language><originalGenre><json:string>article</json:string></originalGenre><abstract>Limited data are available on the physiological responses of leaves from fruiting trees to magnesium (Mg) deficiency. Magnesium deficiency–induced effects on photosystem II (PSII) photochemistry in leaves of fruiting (Citrus reticulate cv. Ponkan) trees were assessed by the chlorophyll a fluorescence (OJIP) transient. Magnesium deficiency decreased leaf CO2 assimilation and carbohydrates, but had no effect on intercellular CO2 concentration. Activity of ribulose‐1,5‐bisphosphate carboxylase/oxygenase (Rubisco) and concentrations of Chlorophyll (Chl) and carotenoids (Car) decreased to a lesser extent than CO2 assimilation. Chlorophyll a fluorescence transient from Mg‐deficient leaves had increased O step and decreased P step, accompanied by positive ΔL, ΔK, ΔJ, and ΔI bands. Magnesium deficiency decreased maximum quantum yield of primary photochemistry (Fv/Fm), quantum yield of electron transport from Q>$>_A^‐>$> to the photosystem I (PSI) end electron acceptors (φR0), maximum amplitude of IP phase and total performance index (PItot, abs), but increased deactiviation of oxygen‐evolving complex (OEC) and energy dissipation. Magnesium‐deficient leaves had higher or similar activities of antioxidant enzymes except for lower catalase (CAT) activity, higher or similar concentrations of antioxidant metabolites, and a higher ratio of Car : Chl. Magnesium‐deficiency did not affect concentration of malondialdehyde (MDA) and ratios of ascorbate (ASC) to ASC + dehydroascorbate (DHA) and reduced glutathione (GSH) to GSH + oxidized glutathione (GSSG). In conclusion, Mg deficiency–induced impairment of the whole photosynthetic electron transport chain may be the main factor contributing to decreased CO2 assimilation. 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Magnesium deficiency–induced effects on photosystem II (PSII) photochemistry in leaves of fruiting (Citrus reticulate cv. Ponkan) trees were assessed by the chlorophyll a fluorescence (OJIP) transient. Magnesium deficiency decreased leaf CO2 assimilation and carbohydrates, but had no effect on intercellular CO2 concentration. Activity of ribulose‐1,5‐bisphosphate carboxylase/oxygenase (Rubisco) and concentrations of Chlorophyll (Chl) and carotenoids (Car) decreased to a lesser extent than CO2 assimilation. Chlorophyll a fluorescence transient from Mg‐deficient leaves had increased O step and decreased P step, accompanied by positive ΔL, ΔK, ΔJ, and ΔI bands. Magnesium deficiency decreased maximum quantum yield of primary photochemistry (Fv/Fm), quantum yield of electron transport from Q<$>_A^‐<$> to the photosystem I (PSI) end electron acceptors (φR0), maximum amplitude of IP phase and total performance index (PItot, abs), but increased deactiviation of oxygen‐evolving complex (OEC) and energy dissipation. Magnesium‐deficient leaves had higher or similar activities of antioxidant enzymes except for lower catalase (CAT) activity, higher or similar concentrations of antioxidant metabolites, and a higher ratio of Car : Chl. Magnesium‐deficiency did not affect concentration of malondialdehyde (MDA) and ratios of ascorbate (ASC) to ASC + dehydroascorbate (DHA) and reduced glutathione (GSH) to GSH + oxidized glutathione (GSSG). In conclusion, Mg deficiency–induced impairment of the whole photosynthetic electron transport chain may be the main factor contributing to decreased CO2 assimilation. Enhanced energy dissipation and antioxidant metabolism provide sufficient protection to Mg‐deficient leaves against photo‐oxidative damage.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>keywords</head><item><term>chlorophyll a fluorescence (OJIP) transient</term></item><item><term>Citrus reticulata</term></item><item><term>photosystem</term></item><item><term>ribulose‐1,5‐bisphosphate carboxylase/oxygenase</term></item></list></keywords></textClass><textClass><keywords scheme="Journal Subject"><list><head>article-category</head><item><term>Regular Article</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2012-06-20">Registration</change><change when="2012-10">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><original>false</original><mimetype>text/plain</mimetype><extension>txt</extension><uri>https://api.istex.fr/document/DDA350CBB979112443D738778E574E95C8E47D05/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component version="2.0" type="serialArticle" xml:lang="en"><header><publicationMeta level="product"><publisherInfo><publisherName>WILEY‐VCH Verlag</publisherName><publisherLoc>Weinheim</publisherLoc></publisherInfo><doi registered="yes">10.1002/(ISSN)1522-2624</doi><issn type="print">1436-8730</issn><issn type="electronic">1522-2624</issn><idGroup><id type="product" value="JPLN"></id></idGroup><titleGroup><title type="main" xml:lang="en" sort="JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE ZEITSCHRIFT FUER PFLANZENERNAEHRUNG UND BODENKUNDE">Journal of Plant Nutrition and Soil Science</title><title type="tocForm">Journal of Plant Nutrition and Soil Science / Zeitschrift für Pflanzenernährung und Bodenkunde</title><title type="short">Z. 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Magnesium deficiency–induced effects on photosystem II (PSII) photochemistry in leaves of fruiting (<i>Citrus reticulate</i> cv. Ponkan) trees were assessed by the chlorophyll a fluorescence (OJIP) transient. Magnesium deficiency decreased leaf CO<sub>2</sub> assimilation and carbohydrates, but had no effect on intercellular CO<sub>2</sub> concentration. Activity of ribulose‐1,5‐bisphosphate carboxylase/oxygenase (Rubisco) and concentrations of Chlorophyll (Chl) and carotenoids (Car) decreased to a lesser extent than CO<sub>2</sub> assimilation. Chlorophyll a fluorescence transient from Mg‐deficient leaves had increased O step and decreased P step, accompanied by positive ΔL, ΔK, ΔJ, and ΔI bands. Magnesium deficiency decreased maximum quantum yield of primary photochemistry (<i>F</i><sub>v</sub>/<i>F</i><sub>m</sub>), quantum yield of electron transport from Q<$>_A^‐<$> to the photosystem I (PSI) end electron acceptors (φ<sub>R0</sub>), maximum amplitude of IP phase and total performance index (PI<sub>tot, abs</sub>), but increased deactiviation of oxygen‐evolving complex (OEC) and energy dissipation. Magnesium‐deficient leaves had higher or similar activities of antioxidant enzymes except for lower catalase (CAT) activity, higher or similar concentrations of antioxidant metabolites, and a higher ratio of Car : Chl. Magnesium‐deficiency did not affect concentration of malondialdehyde (MDA) and ratios of ascorbate (ASC) to ASC + dehydroascorbate (DHA) and reduced glutathione (GSH) to GSH + oxidized glutathione (GSSG). In conclusion, Mg deficiency–induced impairment of the whole photosynthetic electron transport chain may be the main factor contributing to decreased CO<sub>2</sub> assimilation. Enhanced energy dissipation and antioxidant metabolism provide sufficient protection to Mg‐deficient leaves against photo‐oxidative damage.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Magnesium deficiency–induced impairment of photosynthesis in leaves of fruiting Citrus reticulata trees accompanied by up‐regulation of antioxidant metabolism to avoid photo‐oxidative damage</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Magnesium deficiency–induced impairment of photosynthesis in leaves of fruiting Citrus reticulata trees accompanied by up‐regulation of antioxidant metabolism to avoid photo‐oxidative damage</title></titleInfo><name type="personal"><namePart type="given">Ning</namePart><namePart type="family">Tang</namePart><affiliation>College of Resources and Environmental Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China</affiliation><affiliation>Institute of Horticultural Plant Physiology, Biochemistry and Molecular Biology, Fujian Agriculture and Forestry University, Fuzhou 350002, China</affiliation><affiliation>Present address: Bioengineering College, Chongqing University, Chongqing 400044, China</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Yan</namePart><namePart type="family">Li</namePart><affiliation>College of Resources and Environmental Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Li‐Song</namePart><namePart type="family">Chen</namePart><affiliation>College of Resources and Environmental Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China</affiliation><affiliation>E-mail: lisongchen2002@hotmail.com</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>WILEY‐VCH Verlag</publisher><place><placeTerm type="text">Weinheim</placeTerm></place><dateIssued encoding="w3cdtf">2012-10</dateIssued><dateValid encoding="w3cdtf">2012-06-20</dateValid><copyrightDate encoding="w3cdtf">2012</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">6</extent><extent unit="tables">2</extent><extent unit="references">58</extent></physicalDescription><abstract lang="en">Limited data are available on the physiological responses of leaves from fruiting trees to magnesium (Mg) deficiency. Magnesium deficiency–induced effects on photosystem II (PSII) photochemistry in leaves of fruiting (Citrus reticulate cv. Ponkan) trees were assessed by the chlorophyll a fluorescence (OJIP) transient. Magnesium deficiency decreased leaf CO2 assimilation and carbohydrates, but had no effect on intercellular CO2 concentration. Activity of ribulose‐1,5‐bisphosphate carboxylase/oxygenase (Rubisco) and concentrations of Chlorophyll (Chl) and carotenoids (Car) decreased to a lesser extent than CO2 assimilation. Chlorophyll a fluorescence transient from Mg‐deficient leaves had increased O step and decreased P step, accompanied by positive ΔL, ΔK, ΔJ, and ΔI bands. Magnesium deficiency decreased maximum quantum yield of primary photochemistry (Fv/Fm), quantum yield of electron transport from Q<$>_A^‐<$> to the photosystem I (PSI) end electron acceptors (φR0), maximum amplitude of IP phase and total performance index (PItot, abs), but increased deactiviation of oxygen‐evolving complex (OEC) and energy dissipation. Magnesium‐deficient leaves had higher or similar activities of antioxidant enzymes except for lower catalase (CAT) activity, higher or similar concentrations of antioxidant metabolites, and a higher ratio of Car : Chl. Magnesium‐deficiency did not affect concentration of malondialdehyde (MDA) and ratios of ascorbate (ASC) to ASC + dehydroascorbate (DHA) and reduced glutathione (GSH) to GSH + oxidized glutathione (GSSG). In conclusion, Mg deficiency–induced impairment of the whole photosynthetic electron transport chain may be the main factor contributing to decreased CO2 assimilation. Enhanced energy dissipation and antioxidant metabolism provide sufficient protection to Mg‐deficient leaves against photo‐oxidative damage.</abstract><note type="funding">China Agriculture Research System</note><subject lang="en"><genre>keywords</genre><topic>chlorophyll a fluorescence (OJIP) transient</topic><topic>Citrus reticulata</topic><topic>photosystem</topic><topic>ribulose‐1,5‐bisphosphate carboxylase/oxygenase</topic></subject><relatedItem type="host"><titleInfo><title>Journal of Plant Nutrition and Soil Science</title></titleInfo><titleInfo type="abbreviated"><title>Z. Pflanzenernähr. Bodenk.</title></titleInfo><genre type="journal">journal</genre><subject><genre>article-category</genre><topic>Regular Article</topic></subject><identifier type="ISSN">1436-8730</identifier><identifier type="eISSN">1522-2624</identifier><identifier type="DOI">10.1002/(ISSN)1522-2624</identifier><identifier type="PublisherID">JPLN</identifier><part><date>2012</date><detail type="volume"><caption>vol.</caption><number>175</number></detail><detail type="issue"><caption>no.</caption><number>5</number></detail><extent unit="pages"><start>784</start><end>793</end><total>10</total></extent></part></relatedItem><identifier type="istex">DDA350CBB979112443D738778E574E95C8E47D05</identifier><identifier type="DOI">10.1002/jpln.201100329</identifier><identifier type="ArticleID">JPLN201100329</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright © 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>WILEY‐VCH Verlag</recordOrigin></recordInfo></mods></metadata><enrichments><json:item><type>multicat</type><uri>https://api.istex.fr/document/DDA350CBB979112443D738778E574E95C8E47D05/enrichments/multicat</uri></json:item></enrichments><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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