Leaf starch degradation comes out of the shadows
During the day, plants accumulate starch in their leaves as an energy source for the coming night. Based on recent findings, the prevailing view of how the transitory starch is remobilized needs considerable revision. Analyses of transgenic and mutant plants demonstrate that plastidic glucan phospho...
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| Veröffentlicht in: | Trends in plant science 2005-03, Vol.10 (3), p.130-137 |
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| creator | Lloyd, James R. Kossmann, Jens Ritte, Gerhard |
| description | During the day, plants accumulate starch in their leaves as an energy source for the coming night. Based on recent findings, the prevailing view of how the transitory starch is remobilized needs considerable revision. Analyses of transgenic and mutant plants demonstrate that plastidic glucan phosphorylase is not required for normal starch breakdown and cast doubt on the presumed essential role of α-amylase but do show that β-amylase is important. Repression of the activity of a plastidic β-amylase, the export of its product (maltose) or further metabolism of maltose by a newly identified transglucosidase impairs starch degradation. Breakdown of particulate starch also depends on the activity of glucan–water dikinase, which phosphorylates glucosyl residues within the polymer. |
| doi_str_mv | 10.1016/j.tplants.2005.01.001 |
| format | Article |
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Based on recent findings, the prevailing view of how the transitory starch is remobilized needs considerable revision. Analyses of transgenic and mutant plants demonstrate that plastidic glucan phosphorylase is not required for normal starch breakdown and cast doubt on the presumed essential role of α-amylase but do show that β-amylase is important. Repression of the activity of a plastidic β-amylase, the export of its product (maltose) or further metabolism of maltose by a newly identified transglucosidase impairs starch degradation. Breakdown of particulate starch also depends on the activity of glucan–water dikinase, which phosphorylates glucosyl residues within the polymer.</description><identifier>ISSN: 1360-1385</identifier><identifier>EISSN: 1878-4372</identifier><identifier>DOI: 10.1016/j.tplants.2005.01.001</identifier><identifier>PMID: 15749471</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>alpha-Amylases - metabolism ; amylases ; Arabidopsis - genetics ; Arabidopsis - metabolism ; beta-Amylase - metabolism ; biochemical pathways ; Biological and medical sciences ; carbohydrate metabolism ; Darkness ; Fundamental and applied biological sciences. Psychology ; glucan-water dikinase ; glucose ; Glucose - metabolism ; Light ; literature reviews ; maltose ; Maltose - metabolism ; Metabolism ; oligosaccharides ; Phenotype ; Photosynthesis, respiration. Anabolism, catabolism ; plant biochemistry ; Plant Leaves - metabolism ; plant physiology ; Plant physiology and development ; plant proteins ; starch ; Starch - metabolism ; starch-debranching enzyme ; transglucosidase</subject><ispartof>Trends in plant science, 2005-03, Vol.10 (3), p.130-137</ispartof><rights>2005 Elsevier Ltd</rights><rights>2005 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c483t-140994028eececb0a1a48d2be7fd6f5bb69bb502dd072b15b5fd434ffb675d0c3</citedby><cites>FETCH-LOGICAL-c483t-140994028eececb0a1a48d2be7fd6f5bb69bb502dd072b15b5fd434ffb675d0c3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.tplants.2005.01.001$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>315,781,785,3551,27929,27930,46000</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=16625950$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/15749471$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Lloyd, James R.</creatorcontrib><creatorcontrib>Kossmann, Jens</creatorcontrib><creatorcontrib>Ritte, Gerhard</creatorcontrib><title>Leaf starch degradation comes out of the shadows</title><title>Trends in plant science</title><addtitle>Trends Plant Sci</addtitle><description>During the day, plants accumulate starch in their leaves as an energy source for the coming night. Based on recent findings, the prevailing view of how the transitory starch is remobilized needs considerable revision. Analyses of transgenic and mutant plants demonstrate that plastidic glucan phosphorylase is not required for normal starch breakdown and cast doubt on the presumed essential role of α-amylase but do show that β-amylase is important. Repression of the activity of a plastidic β-amylase, the export of its product (maltose) or further metabolism of maltose by a newly identified transglucosidase impairs starch degradation. Breakdown of particulate starch also depends on the activity of glucan–water dikinase, which phosphorylates glucosyl residues within the polymer.</description><subject>alpha-Amylases - metabolism</subject><subject>amylases</subject><subject>Arabidopsis - genetics</subject><subject>Arabidopsis - metabolism</subject><subject>beta-Amylase - metabolism</subject><subject>biochemical pathways</subject><subject>Biological and medical sciences</subject><subject>carbohydrate metabolism</subject><subject>Darkness</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>glucan-water dikinase</subject><subject>glucose</subject><subject>Glucose - metabolism</subject><subject>Light</subject><subject>literature reviews</subject><subject>maltose</subject><subject>Maltose - metabolism</subject><subject>Metabolism</subject><subject>oligosaccharides</subject><subject>Phenotype</subject><subject>Photosynthesis, respiration. Anabolism, catabolism</subject><subject>plant biochemistry</subject><subject>Plant Leaves - metabolism</subject><subject>plant physiology</subject><subject>Plant physiology and development</subject><subject>plant proteins</subject><subject>starch</subject><subject>Starch - metabolism</subject><subject>starch-debranching enzyme</subject><subject>transglucosidase</subject><issn>1360-1385</issn><issn>1878-4372</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2005</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqF0ElvEzEUwHELgegCHwGYC73N8OzxNidUVSyVInEoPVtenpuJkjjYDhXfvq4yUo-c7MPvefkT8oHCQIHKL5uhHrZ2X8vAAMQAdACgr8g51Ur3fFTsdduPEno6anFGLkrZAICiWr4lZ1QoPnFFzwms0MauVJv9ugv4kG2wdU77zqcdli4da5diV9fYlbUN6bG8I2-i3RZ8v6yX5P77t983P_vVrx-3N9er3nM91p5ymCYOTCN69A4stVwH5lDFIKNwTk7OCWAhgGKOCidi4COP0UklAvjxklydzj3k9OeIpZrdXDxu258xHYuRimvN5NSgOEGfUykZoznkeWfzP0PBPKcyG7OkMs-pDFDTUrW5j8sFR7fD8DK1tGng8wJs8XYbs937ubw4KZmYBDT36eSiTcY-5Gbu71i7AWDSlFLVxNeTwBbs74zZFD_j3mOYM_pqQpr_89gnmJmSxA</recordid><startdate>20050301</startdate><enddate>20050301</enddate><creator>Lloyd, James R.</creator><creator>Kossmann, Jens</creator><creator>Ritte, Gerhard</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>FBQ</scope><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20050301</creationdate><title>Leaf starch degradation comes out of the shadows</title><author>Lloyd, James R. ; Kossmann, Jens ; Ritte, Gerhard</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c483t-140994028eececb0a1a48d2be7fd6f5bb69bb502dd072b15b5fd434ffb675d0c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2005</creationdate><topic>alpha-Amylases - metabolism</topic><topic>amylases</topic><topic>Arabidopsis - genetics</topic><topic>Arabidopsis - metabolism</topic><topic>beta-Amylase - metabolism</topic><topic>biochemical pathways</topic><topic>Biological and medical sciences</topic><topic>carbohydrate metabolism</topic><topic>Darkness</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>glucan-water dikinase</topic><topic>glucose</topic><topic>Glucose - metabolism</topic><topic>Light</topic><topic>literature reviews</topic><topic>maltose</topic><topic>Maltose - metabolism</topic><topic>Metabolism</topic><topic>oligosaccharides</topic><topic>Phenotype</topic><topic>Photosynthesis, respiration. Anabolism, catabolism</topic><topic>plant biochemistry</topic><topic>Plant Leaves - metabolism</topic><topic>plant physiology</topic><topic>Plant physiology and development</topic><topic>plant proteins</topic><topic>starch</topic><topic>Starch - metabolism</topic><topic>starch-debranching enzyme</topic><topic>transglucosidase</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lloyd, James R.</creatorcontrib><creatorcontrib>Kossmann, Jens</creatorcontrib><creatorcontrib>Ritte, Gerhard</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Trends in plant science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lloyd, James R.</au><au>Kossmann, Jens</au><au>Ritte, Gerhard</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Leaf starch degradation comes out of the shadows</atitle><jtitle>Trends in plant science</jtitle><addtitle>Trends Plant Sci</addtitle><date>2005-03-01</date><risdate>2005</risdate><volume>10</volume><issue>3</issue><spage>130</spage><epage>137</epage><pages>130-137</pages><issn>1360-1385</issn><eissn>1878-4372</eissn><abstract>During the day, plants accumulate starch in their leaves as an energy source for the coming night. 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| fulltext | fulltext |
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| ispartof | Trends in plant science, 2005-03, Vol.10 (3), p.130-137 |
| issn | 1360-1385 1878-4372 |
| language | eng |
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| source | MEDLINE; Access via ScienceDirect (Elsevier) |
| subjects | alpha-Amylases - metabolism amylases Arabidopsis - genetics Arabidopsis - metabolism beta-Amylase - metabolism biochemical pathways Biological and medical sciences carbohydrate metabolism Darkness Fundamental and applied biological sciences. Psychology glucan-water dikinase glucose Glucose - metabolism Light literature reviews maltose Maltose - metabolism Metabolism oligosaccharides Phenotype Photosynthesis, respiration. Anabolism, catabolism plant biochemistry Plant Leaves - metabolism plant physiology Plant physiology and development plant proteins starch Starch - metabolism starch-debranching enzyme transglucosidase |
| title | Leaf starch degradation comes out of the shadows |
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