Serveur d'exploration sur le peuplier

Attention, ce site est en cours de développement !
Attention, site généré par des moyens informatiques à partir de corpus bruts.
Les informations ne sont donc pas validées.

Biochemical and proteomic analyses reveal that Populus cathayana males and females have different metabolic activities under chilling stress.

Identifieur interne : 002B84 ( Main/Exploration ); précédent : 002B83; suivant : 002B85

Biochemical and proteomic analyses reveal that Populus cathayana males and females have different metabolic activities under chilling stress.

Auteurs : Sheng Zhang [République populaire de Chine] ; Lihua Feng ; Hao Jiang ; Wujun Ma ; Helena Korpelainen ; Chunyang Li

Source :

RBID : pubmed:23072643

Descripteurs français

English descriptors

Abstract

Male and female poplars (Populus cathayana Rehd.) respond differently to environmental stresses. However, little is known about sex-dependent responses to chilling at the proteome level. To better understand these differences, a comparative proteomics investigation combined with a biochemical approach was used in the current study. Three-month-old poplar cuttings were treated at 25 or 4 °C for 14 days. Results revealed significant sexual differences in nitrogen metabolic enzymes and free amino acid components in response to chilling. The chilling-treated males showed higher activities of nitrate reductase and glutamine synthetase and higher contents of reduced glutathione, serine, arginine, leucine, glycine, proline and methionine than chilling-treated females. A total of 65 chilling-responsive spots were found, of which 48 showed significant sexual differences. These proteins are involved in photosynthesis, carbon and energy metabolism, metabolic processes of proteins, lipid metabolism, vitamin metabolism, stress defense, and gene expression regulation. The study shows that males have more effective metabolic processes and protective systems to chilling than females.

DOI: 10.1021/pr3005953
PubMed: 23072643


Affiliations:


Links toward previous steps (curation, corpus...)


Le document en format XML

<record>
<TEI>
<teiHeader>
<fileDesc>
<titleStmt>
<title xml:lang="en">Biochemical and proteomic analyses reveal that Populus cathayana males and females have different metabolic activities under chilling stress.</title>
<author>
<name sortKey="Zhang, Sheng" sort="Zhang, Sheng" uniqKey="Zhang S" first="Sheng" last="Zhang">Sheng Zhang</name>
<affiliation wicri:level="1">
<nlm:affiliation>Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China.</nlm:affiliation>
<country xml:lang="fr">République populaire de Chine</country>
<wicri:regionArea>Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041</wicri:regionArea>
<wicri:noRegion>Chengdu 610041</wicri:noRegion>
</affiliation>
</author>
<author>
<name sortKey="Feng, Lihua" sort="Feng, Lihua" uniqKey="Feng L" first="Lihua" last="Feng">Lihua Feng</name>
</author>
<author>
<name sortKey="Jiang, Hao" sort="Jiang, Hao" uniqKey="Jiang H" first="Hao" last="Jiang">Hao Jiang</name>
</author>
<author>
<name sortKey="Ma, Wujun" sort="Ma, Wujun" uniqKey="Ma W" first="Wujun" last="Ma">Wujun Ma</name>
</author>
<author>
<name sortKey="Korpelainen, Helena" sort="Korpelainen, Helena" uniqKey="Korpelainen H" first="Helena" last="Korpelainen">Helena Korpelainen</name>
</author>
<author>
<name sortKey="Li, Chunyang" sort="Li, Chunyang" uniqKey="Li C" first="Chunyang" last="Li">Chunyang Li</name>
</author>
</titleStmt>
<publicationStmt>
<idno type="wicri:source">PubMed</idno>
<date when="2012">2012</date>
<idno type="RBID">pubmed:23072643</idno>
<idno type="pmid">23072643</idno>
<idno type="doi">10.1021/pr3005953</idno>
<idno type="wicri:Area/Main/Corpus">002849</idno>
<idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">002849</idno>
<idno type="wicri:Area/Main/Curation">002849</idno>
<idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Curation">002849</idno>
<idno type="wicri:Area/Main/Exploration">002849</idno>
</publicationStmt>
<sourceDesc>
<biblStruct>
<analytic>
<title xml:lang="en">Biochemical and proteomic analyses reveal that Populus cathayana males and females have different metabolic activities under chilling stress.</title>
<author>
<name sortKey="Zhang, Sheng" sort="Zhang, Sheng" uniqKey="Zhang S" first="Sheng" last="Zhang">Sheng Zhang</name>
<affiliation wicri:level="1">
<nlm:affiliation>Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China.</nlm:affiliation>
<country xml:lang="fr">République populaire de Chine</country>
<wicri:regionArea>Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041</wicri:regionArea>
<wicri:noRegion>Chengdu 610041</wicri:noRegion>
</affiliation>
</author>
<author>
<name sortKey="Feng, Lihua" sort="Feng, Lihua" uniqKey="Feng L" first="Lihua" last="Feng">Lihua Feng</name>
</author>
<author>
<name sortKey="Jiang, Hao" sort="Jiang, Hao" uniqKey="Jiang H" first="Hao" last="Jiang">Hao Jiang</name>
</author>
<author>
<name sortKey="Ma, Wujun" sort="Ma, Wujun" uniqKey="Ma W" first="Wujun" last="Ma">Wujun Ma</name>
</author>
<author>
<name sortKey="Korpelainen, Helena" sort="Korpelainen, Helena" uniqKey="Korpelainen H" first="Helena" last="Korpelainen">Helena Korpelainen</name>
</author>
<author>
<name sortKey="Li, Chunyang" sort="Li, Chunyang" uniqKey="Li C" first="Chunyang" last="Li">Chunyang Li</name>
</author>
</analytic>
<series>
<title level="j">Journal of proteome research</title>
<idno type="eISSN">1535-3907</idno>
<imprint>
<date when="2012" type="published">2012</date>
</imprint>
</series>
</biblStruct>
</sourceDesc>
</fileDesc>
<profileDesc>
<textClass>
<keywords scheme="KwdEn" xml:lang="en">
<term>Amino Acids (metabolism)</term>
<term>Cold Temperature (MeSH)</term>
<term>Energy Metabolism (MeSH)</term>
<term>Enzyme Activation (MeSH)</term>
<term>Glutamate-Ammonia Ligase (analysis)</term>
<term>Glutamate-Ammonia Ligase (metabolism)</term>
<term>Glutathione (analysis)</term>
<term>Glutathione (metabolism)</term>
<term>Nitrate Reductase (analysis)</term>
<term>Nitrate Reductase (metabolism)</term>
<term>Nitrogen (metabolism)</term>
<term>Photosynthesis (MeSH)</term>
<term>Plant Leaves (metabolism)</term>
<term>Plant Proteins (analysis)</term>
<term>Plant Proteins (metabolism)</term>
<term>Populus (metabolism)</term>
<term>Populus (physiology)</term>
<term>Proteome (analysis)</term>
<term>Proteome (metabolism)</term>
<term>Proteomics (methods)</term>
<term>Species Specificity (MeSH)</term>
<term>Stress, Physiological (MeSH)</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr">
<term>Acides aminés (métabolisme)</term>
<term>Activation enzymatique (MeSH)</term>
<term>Azote (métabolisme)</term>
<term>Basse température (MeSH)</term>
<term>Feuilles de plante (métabolisme)</term>
<term>Glutamate-ammonia ligase (analyse)</term>
<term>Glutamate-ammonia ligase (métabolisme)</term>
<term>Glutathion (analyse)</term>
<term>Glutathion (métabolisme)</term>
<term>Métabolisme énergétique (MeSH)</term>
<term>Nitrate reductase (analyse)</term>
<term>Nitrate reductase (métabolisme)</term>
<term>Photosynthèse (MeSH)</term>
<term>Populus (métabolisme)</term>
<term>Populus (physiologie)</term>
<term>Protéines végétales (analyse)</term>
<term>Protéines végétales (métabolisme)</term>
<term>Protéome (analyse)</term>
<term>Protéome (métabolisme)</term>
<term>Protéomique (méthodes)</term>
<term>Spécificité d'espèce (MeSH)</term>
<term>Stress physiologique (MeSH)</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="analysis" xml:lang="en">
<term>Glutamate-Ammonia Ligase</term>
<term>Glutathione</term>
<term>Nitrate Reductase</term>
<term>Plant Proteins</term>
<term>Proteome</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en">
<term>Amino Acids</term>
<term>Glutamate-Ammonia Ligase</term>
<term>Glutathione</term>
<term>Nitrate Reductase</term>
<term>Nitrogen</term>
<term>Plant Proteins</term>
<term>Proteome</term>
</keywords>
<keywords scheme="MESH" qualifier="analyse" xml:lang="fr">
<term>Glutamate-ammonia ligase</term>
<term>Glutathion</term>
<term>Nitrate reductase</term>
<term>Protéines végétales</term>
<term>Protéome</term>
</keywords>
<keywords scheme="MESH" qualifier="metabolism" xml:lang="en">
<term>Plant Leaves</term>
<term>Populus</term>
</keywords>
<keywords scheme="MESH" qualifier="methods" xml:lang="en">
<term>Proteomics</term>
</keywords>
<keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr">
<term>Acides aminés</term>
<term>Azote</term>
<term>Feuilles de plante</term>
<term>Glutamate-ammonia ligase</term>
<term>Glutathion</term>
<term>Nitrate reductase</term>
<term>Populus</term>
<term>Protéines végétales</term>
<term>Protéome</term>
</keywords>
<keywords scheme="MESH" qualifier="méthodes" xml:lang="fr">
<term>Protéomique</term>
</keywords>
<keywords scheme="MESH" qualifier="physiologie" xml:lang="fr">
<term>Populus</term>
</keywords>
<keywords scheme="MESH" qualifier="physiology" xml:lang="en">
<term>Populus</term>
</keywords>
<keywords scheme="MESH" xml:lang="en">
<term>Cold Temperature</term>
<term>Energy Metabolism</term>
<term>Enzyme Activation</term>
<term>Photosynthesis</term>
<term>Species Specificity</term>
<term>Stress, Physiological</term>
</keywords>
<keywords scheme="MESH" xml:lang="fr">
<term>Activation enzymatique</term>
<term>Basse température</term>
<term>Métabolisme énergétique</term>
<term>Photosynthèse</term>
<term>Spécificité d'espèce</term>
<term>Stress physiologique</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front>
<div type="abstract" xml:lang="en">Male and female poplars (Populus cathayana Rehd.) respond differently to environmental stresses. However, little is known about sex-dependent responses to chilling at the proteome level. To better understand these differences, a comparative proteomics investigation combined with a biochemical approach was used in the current study. Three-month-old poplar cuttings were treated at 25 or 4 °C for 14 days. Results revealed significant sexual differences in nitrogen metabolic enzymes and free amino acid components in response to chilling. The chilling-treated males showed higher activities of nitrate reductase and glutamine synthetase and higher contents of reduced glutathione, serine, arginine, leucine, glycine, proline and methionine than chilling-treated females. A total of 65 chilling-responsive spots were found, of which 48 showed significant sexual differences. These proteins are involved in photosynthesis, carbon and energy metabolism, metabolic processes of proteins, lipid metabolism, vitamin metabolism, stress defense, and gene expression regulation. The study shows that males have more effective metabolic processes and protective systems to chilling than females.</div>
</front>
</TEI>
<pubmed>
<MedlineCitation Status="MEDLINE" Owner="NLM">
<PMID Version="1">23072643</PMID>
<DateCompleted>
<Year>2013</Year>
<Month>05</Month>
<Day>23</Day>
</DateCompleted>
<DateRevised>
<Year>2013</Year>
<Month>11</Month>
<Day>21</Day>
</DateRevised>
<Article PubModel="Print-Electronic">
<Journal>
<ISSN IssnType="Electronic">1535-3907</ISSN>
<JournalIssue CitedMedium="Internet">
<Volume>11</Volume>
<Issue>12</Issue>
<PubDate>
<Year>2012</Year>
<Month>Dec</Month>
<Day>07</Day>
</PubDate>
</JournalIssue>
<Title>Journal of proteome research</Title>
<ISOAbbreviation>J Proteome Res</ISOAbbreviation>
</Journal>
<ArticleTitle>Biochemical and proteomic analyses reveal that Populus cathayana males and females have different metabolic activities under chilling stress.</ArticleTitle>
<Pagination>
<MedlinePgn>5815-26</MedlinePgn>
</Pagination>
<ELocationID EIdType="doi" ValidYN="Y">10.1021/pr3005953</ELocationID>
<Abstract>
<AbstractText>Male and female poplars (Populus cathayana Rehd.) respond differently to environmental stresses. However, little is known about sex-dependent responses to chilling at the proteome level. To better understand these differences, a comparative proteomics investigation combined with a biochemical approach was used in the current study. Three-month-old poplar cuttings were treated at 25 or 4 °C for 14 days. Results revealed significant sexual differences in nitrogen metabolic enzymes and free amino acid components in response to chilling. The chilling-treated males showed higher activities of nitrate reductase and glutamine synthetase and higher contents of reduced glutathione, serine, arginine, leucine, glycine, proline and methionine than chilling-treated females. A total of 65 chilling-responsive spots were found, of which 48 showed significant sexual differences. These proteins are involved in photosynthesis, carbon and energy metabolism, metabolic processes of proteins, lipid metabolism, vitamin metabolism, stress defense, and gene expression regulation. The study shows that males have more effective metabolic processes and protective systems to chilling than females.</AbstractText>
</Abstract>
<AuthorList CompleteYN="Y">
<Author ValidYN="Y">
<LastName>Zhang</LastName>
<ForeName>Sheng</ForeName>
<Initials>S</Initials>
<AffiliationInfo>
<Affiliation>Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Feng</LastName>
<ForeName>Lihua</ForeName>
<Initials>L</Initials>
</Author>
<Author ValidYN="Y">
<LastName>Jiang</LastName>
<ForeName>Hao</ForeName>
<Initials>H</Initials>
</Author>
<Author ValidYN="Y">
<LastName>Ma</LastName>
<ForeName>Wujun</ForeName>
<Initials>W</Initials>
</Author>
<Author ValidYN="Y">
<LastName>Korpelainen</LastName>
<ForeName>Helena</ForeName>
<Initials>H</Initials>
</Author>
<Author ValidYN="Y">
<LastName>Li</LastName>
<ForeName>Chunyang</ForeName>
<Initials>C</Initials>
</Author>
</AuthorList>
<Language>eng</Language>
<PublicationTypeList>
<PublicationType UI="D016428">Journal Article</PublicationType>
<PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType>
</PublicationTypeList>
<ArticleDate DateType="Electronic">
<Year>2012</Year>
<Month>10</Month>
<Day>29</Day>
</ArticleDate>
</Article>
<MedlineJournalInfo>
<Country>United States</Country>
<MedlineTA>J Proteome Res</MedlineTA>
<NlmUniqueID>101128775</NlmUniqueID>
<ISSNLinking>1535-3893</ISSNLinking>
</MedlineJournalInfo>
<ChemicalList>
<Chemical>
<RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D000596">Amino Acids</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D010940">Plant Proteins</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D020543">Proteome</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>EC 1.7.99.4</RegistryNumber>
<NameOfSubstance UI="D050901">Nitrate Reductase</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>EC 6.3.1.2</RegistryNumber>
<NameOfSubstance UI="D005974">Glutamate-Ammonia Ligase</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>GAN16C9B8O</RegistryNumber>
<NameOfSubstance UI="D005978">Glutathione</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>N762921K75</RegistryNumber>
<NameOfSubstance UI="D009584">Nitrogen</NameOfSubstance>
</Chemical>
</ChemicalList>
<CitationSubset>IM</CitationSubset>
<MeshHeadingList>
<MeshHeading>
<DescriptorName UI="D000596" MajorTopicYN="N">Amino Acids</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D003080" MajorTopicYN="N">Cold Temperature</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D004734" MajorTopicYN="N">Energy Metabolism</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D004789" MajorTopicYN="N">Enzyme Activation</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D005974" MajorTopicYN="N">Glutamate-Ammonia Ligase</DescriptorName>
<QualifierName UI="Q000032" MajorTopicYN="N">analysis</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D005978" MajorTopicYN="N">Glutathione</DescriptorName>
<QualifierName UI="Q000032" MajorTopicYN="N">analysis</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D050901" MajorTopicYN="N">Nitrate Reductase</DescriptorName>
<QualifierName UI="Q000032" MajorTopicYN="N">analysis</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D009584" MajorTopicYN="N">Nitrogen</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D010788" MajorTopicYN="N">Photosynthesis</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D018515" MajorTopicYN="N">Plant Leaves</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D010940" MajorTopicYN="N">Plant Proteins</DescriptorName>
<QualifierName UI="Q000032" MajorTopicYN="Y">analysis</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
<QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D020543" MajorTopicYN="N">Proteome</DescriptorName>
<QualifierName UI="Q000032" MajorTopicYN="Y">analysis</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D040901" MajorTopicYN="N">Proteomics</DescriptorName>
<QualifierName UI="Q000379" MajorTopicYN="N">methods</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D013045" MajorTopicYN="N">Species Specificity</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D013312" MajorTopicYN="Y">Stress, Physiological</DescriptorName>
</MeshHeading>
</MeshHeadingList>
</MedlineCitation>
<PubmedData>
<History>
<PubMedPubDate PubStatus="entrez">
<Year>2012</Year>
<Month>10</Month>
<Day>18</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
<PubMedPubDate PubStatus="pubmed">
<Year>2012</Year>
<Month>10</Month>
<Day>18</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
<PubMedPubDate PubStatus="medline">
<Year>2013</Year>
<Month>5</Month>
<Day>25</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
</History>
<PublicationStatus>ppublish</PublicationStatus>
<ArticleIdList>
<ArticleId IdType="pubmed">23072643</ArticleId>
<ArticleId IdType="doi">10.1021/pr3005953</ArticleId>
</ArticleIdList>
</PubmedData>
</pubmed>
<affiliations>
<list>
<country>
<li>République populaire de Chine</li>
</country>
</list>
<tree>
<noCountry>
<name sortKey="Feng, Lihua" sort="Feng, Lihua" uniqKey="Feng L" first="Lihua" last="Feng">Lihua Feng</name>
<name sortKey="Jiang, Hao" sort="Jiang, Hao" uniqKey="Jiang H" first="Hao" last="Jiang">Hao Jiang</name>
<name sortKey="Korpelainen, Helena" sort="Korpelainen, Helena" uniqKey="Korpelainen H" first="Helena" last="Korpelainen">Helena Korpelainen</name>
<name sortKey="Li, Chunyang" sort="Li, Chunyang" uniqKey="Li C" first="Chunyang" last="Li">Chunyang Li</name>
<name sortKey="Ma, Wujun" sort="Ma, Wujun" uniqKey="Ma W" first="Wujun" last="Ma">Wujun Ma</name>
</noCountry>
<country name="République populaire de Chine">
<noRegion>
<name sortKey="Zhang, Sheng" sort="Zhang, Sheng" uniqKey="Zhang S" first="Sheng" last="Zhang">Sheng Zhang</name>
</noRegion>
</country>
</tree>
</affiliations>
</record>

Pour manipuler ce document sous Unix (Dilib)

EXPLOR_STEP=$WICRI_ROOT/Bois/explor/PoplarV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 002B84 | SxmlIndent | more

Ou

HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 002B84 | SxmlIndent | more

Pour mettre un lien sur cette page dans le réseau Wicri

{{Explor lien
   |wiki=    Bois
   |area=    PoplarV1
   |flux=    Main
   |étape=   Exploration
   |type=    RBID
   |clé=     pubmed:23072643
   |texte=   Biochemical and proteomic analyses reveal that Populus cathayana males and females have different metabolic activities under chilling stress.
}}

Pour générer des pages wiki

HfdIndexSelect -h $EXPLOR_AREA/Data/Main/Exploration/RBID.i   -Sk "pubmed:23072643" \
       | HfdSelect -Kh $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd   \
       | NlmPubMed2Wicri -a PoplarV1 

Wicri

This area was generated with Dilib version V0.6.37.
Data generation: Wed Nov 18 12:07:19 2020. Site generation: Wed Nov 18 12:16:31 2020