[Effects of exogenous nitric oxide on photosynthetic characteristics of poplar leaves under water stress].
Identifieur interne : 003F13 ( Main/Exploration ); précédent : 003F12; suivant : 003F14[Effects of exogenous nitric oxide on photosynthetic characteristics of poplar leaves under water stress].
Auteurs : Miao Wang [République populaire de Chine] ; Qiurong Li ; Shilei Fu ; Baili DongSource :
- Ying yong sheng tai xue bao = The journal of applied ecology [ 1001-9332 ] ; 2005.
Descripteurs français
- KwdFr :
- MESH :
- croissance et développement : Populus.
- physiologie : Feuilles de plante, Populus.
- Eau, Monoxyde d'azote, Photosynthèse.
English descriptors
- KwdEn :
- MESH :
- chemical : Nitric Oxide, Water.
- growth & development : Populus.
- physiology : Plant Leaves, Populus.
- Photosynthesis.
Abstract
Nitric oxide (NO) is an active molecule involved in many biological pathways, but its effects on photosynthesis of tree leaves have not been established yet. This paper studied the effects of exogenous NO, sodium nitroprusside (SNP), on the water status, photosynthesis and scavenging enzyme activities in poplar leaves. Different levels of SNP treatments had remarkable effects on the water content of leaves, which increased with increasing SNP levels. When the SNP level exceeded 500 micromol x L(-1), differences in leaf water content were no longer significant between different SNP treatments. Exogenous NO increased the photosynthesis rate, photochemical efficiency of PSII Fv/Fm, and Fm/Fo and Fv/Fo ratios, and the effects decreased with increasing duration of water stress. The SOD and POD activities in poplar leaves were higher in 1 hour water stress treatment than in 3 h treatment. Treating with SNP could markedly increase POD activity, but SOD activity did not change much. POD and SOD activities increased initially, and then decreased with increasing SNP levels. The results indicated that exogenous NO delayed the accumulation of active oxygen by increasing POD and SOD activities, and thereby, alleviated the effects of water stress on photosynthetic organization of poplar leaves.
PubMed: 15852911
Affiliations:
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This paper studied the effects of exogenous NO, sodium nitroprusside (SNP), on the water status, photosynthesis and scavenging enzyme activities in poplar leaves. Different levels of SNP treatments had remarkable effects on the water content of leaves, which increased with increasing SNP levels. When the SNP level exceeded 500 micromol x L(-1), differences in leaf water content were no longer significant between different SNP treatments. Exogenous NO increased the photosynthesis rate, photochemical efficiency of PSII Fv/Fm, and Fm/Fo and Fv/Fo ratios, and the effects decreased with increasing duration of water stress. The SOD and POD activities in poplar leaves were higher in 1 hour water stress treatment than in 3 h treatment. Treating with SNP could markedly increase POD activity, but SOD activity did not change much. POD and SOD activities increased initially, and then decreased with increasing SNP levels. The results indicated that exogenous NO delayed the accumulation of active oxygen by increasing POD and SOD activities, and thereby, alleviated the effects of water stress on photosynthetic organization of poplar leaves.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">15852911</PMID><DateCompleted><Year>2006</Year><Month>06</Month><Day>20</Day></DateCompleted><DateRevised><Year>2016</Year><Month>10</Month><Day>18</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">1001-9332</ISSN><JournalIssue CitedMedium="Print"><Volume>16</Volume><Issue>2</Issue><PubDate><Year>2005</Year><Month>Feb</Month></PubDate></JournalIssue><Title>Ying yong sheng tai xue bao = The journal of applied ecology</Title><ISOAbbreviation>Ying Yong Sheng Tai Xue Bao</ISOAbbreviation></Journal><ArticleTitle>[Effects of exogenous nitric oxide on photosynthetic characteristics of poplar leaves under water stress].</ArticleTitle><Pagination><MedlinePgn>218-22</MedlinePgn></Pagination><Abstract><AbstractText>Nitric oxide (NO) is an active molecule involved in many biological pathways, but its effects on photosynthesis of tree leaves have not been established yet. This paper studied the effects of exogenous NO, sodium nitroprusside (SNP), on the water status, photosynthesis and scavenging enzyme activities in poplar leaves. Different levels of SNP treatments had remarkable effects on the water content of leaves, which increased with increasing SNP levels. When the SNP level exceeded 500 micromol x L(-1), differences in leaf water content were no longer significant between different SNP treatments. Exogenous NO increased the photosynthesis rate, photochemical efficiency of PSII Fv/Fm, and Fm/Fo and Fv/Fo ratios, and the effects decreased with increasing duration of water stress. The SOD and POD activities in poplar leaves were higher in 1 hour water stress treatment than in 3 h treatment. Treating with SNP could markedly increase POD activity, but SOD activity did not change much. POD and SOD activities increased initially, and then decreased with increasing SNP levels. The results indicated that exogenous NO delayed the accumulation of active oxygen by increasing POD and SOD activities, and thereby, alleviated the effects of water stress on photosynthetic organization of poplar leaves.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Wang</LastName><ForeName>Miao</ForeName><Initials>M</Initials><AffiliationInfo><Affiliation>Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China. wangmiao@iae.ac.cn</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Li</LastName><ForeName>Qiurong</ForeName><Initials>Q</Initials></Author><Author ValidYN="Y"><LastName>Fu</LastName><ForeName>Shilei</ForeName><Initials>S</Initials></Author><Author ValidYN="Y"><LastName>Dong</LastName><ForeName>Baili</ForeName><Initials>B</Initials></Author></AuthorList><Language>chi</Language><PublicationTypeList><PublicationType UI="D004740">English Abstract</PublicationType><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>China</Country><MedlineTA>Ying Yong Sheng Tai Xue Bao</MedlineTA><NlmUniqueID>9425159</NlmUniqueID><ISSNLinking>1001-9332</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>059QF0KO0R</RegistryNumber><NameOfSubstance UI="D014867">Water</NameOfSubstance></Chemical><Chemical><RegistryNumber>31C4KY9ESH</RegistryNumber><NameOfSubstance UI="D009569">Nitric Oxide</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D009569" MajorTopicYN="Y">Nitric Oxide</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D010788" MajorTopicYN="Y">Photosynthesis</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D018515" MajorTopicYN="N">Plant Leaves</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName><QualifierName UI="Q000254" MajorTopicYN="N">growth & development</QualifierName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D014867" MajorTopicYN="Y">Water</DescriptorName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="pubmed"><Year>2005</Year><Month>4</Month><Day>28</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2006</Year><Month>6</Month><Day>21</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2005</Year><Month>4</Month><Day>28</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">15852911</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>République populaire de Chine</li></country></list><tree><noCountry><name sortKey="Dong, Baili" sort="Dong, Baili" uniqKey="Dong B" first="Baili" last="Dong">Baili Dong</name><name sortKey="Fu, Shilei" sort="Fu, Shilei" uniqKey="Fu S" first="Shilei" last="Fu">Shilei Fu</name><name sortKey="Li, Qiurong" sort="Li, Qiurong" uniqKey="Li Q" first="Qiurong" last="Li">Qiurong Li</name></noCountry><country name="République populaire de Chine"><noRegion><name sortKey="Wang, Miao" sort="Wang, Miao" uniqKey="Wang M" first="Miao" last="Wang">Miao Wang</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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