Participation of Green Organs to Grain Filling in Triticum turgidum var durum Grown under Mediterranean Conditions
In wheat, flag leaf, stem, chaff and awns contribute to grain filling through photosynthesis and/or re-mobilization. Environmental and genetic effects on the relative contribution of each organ were examined by analyzing the consequences of sink-source manipulations (shading and excision) and by com...
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| Veröffentlicht in: | International journal of molecular sciences 2018-01, Vol.19 (1), p.56 |
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| description | In wheat, flag leaf, stem, chaff and awns contribute to grain filling through photosynthesis and/or re-mobilization. Environmental and genetic effects on the relative contribution of each organ were examined by analyzing the consequences of sink-source manipulations (shading and excision) and by comparing carbon isotope discrimination (Δ) values in dry matter (at maturity) and sap (two weeks after anthesis) in six durum wheat genotypes grown in two contrasting seasons. The contribution of flag leaf, stem, chaff and awns to grain filling, estimated by sink-source manipulations, highly varied with the season. The contribution of ear photosynthesis and re-mobilization from the stem increased with post-anthesis water stress. They showed a large genetic variation that was, however, not clearly associated to morphological characteristics of ear and stem. Isotopic imprints of chaff on grain Δ were identified as a possible surrogate of the destructive and cumbersome sink-source manipulations to evaluate the contribution of carbon assimilated in ears or re-mobilized from stem. This might facilitate screening of genetic resources and allow the combining of favourable drought tolerance mechanisms in wheat. |
| doi_str_mv | 10.3390/ijms19010056 |
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Environmental and genetic effects on the relative contribution of each organ were examined by analyzing the consequences of sink-source manipulations (shading and excision) and by comparing carbon isotope discrimination (Δ) values in dry matter (at maturity) and sap (two weeks after anthesis) in six durum wheat genotypes grown in two contrasting seasons. The contribution of flag leaf, stem, chaff and awns to grain filling, estimated by sink-source manipulations, highly varied with the season. The contribution of ear photosynthesis and re-mobilization from the stem increased with post-anthesis water stress. They showed a large genetic variation that was, however, not clearly associated to morphological characteristics of ear and stem. Isotopic imprints of chaff on grain Δ were identified as a possible surrogate of the destructive and cumbersome sink-source manipulations to evaluate the contribution of carbon assimilated in ears or re-mobilized from stem. This might facilitate screening of genetic resources and allow the combining of favourable drought tolerance mechanisms in wheat.</description><identifier>ISSN: 1422-0067</identifier><identifier>ISSN: 1661-6596</identifier><identifier>EISSN: 1422-0067</identifier><identifier>DOI: 10.3390/ijms19010056</identifier><identifier>PMID: 29295600</identifier><language>eng</language><publisher>Switzerland: MDPI AG</publisher><subject>Agriculture ; Carbohydrates ; Carbon ; Carbon isotopes ; Carbon Isotopes - metabolism ; Chemical and Process Engineering ; Cultivars ; Drought ; Drought resistance ; Dry matter ; Engineering Sciences ; Food engineering ; Genetic diversity ; Genetic resources ; Genetic screening ; Genotype ; Genotype & phenotype ; Genotypes ; Grain ; Leaves ; Life Sciences ; Mediterranean Region ; Morphology ; Organ Specificity ; Organs ; Photosynthesis ; Physical characteristics ; Quantitative Trait, Heritable ; Rain ; Seeds - genetics ; Seeds - growth & development ; Shading ; Temperature ; Triticum - genetics ; Triticum - growth & development ; Triticum turgidum ; Water stress ; Wheat</subject><ispartof>International journal of molecular sciences, 2018-01, Vol.19 (1), p.56</ispartof><rights>2018. 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Environmental and genetic effects on the relative contribution of each organ were examined by analyzing the consequences of sink-source manipulations (shading and excision) and by comparing carbon isotope discrimination (Δ) values in dry matter (at maturity) and sap (two weeks after anthesis) in six durum wheat genotypes grown in two contrasting seasons. The contribution of flag leaf, stem, chaff and awns to grain filling, estimated by sink-source manipulations, highly varied with the season. The contribution of ear photosynthesis and re-mobilization from the stem increased with post-anthesis water stress. They showed a large genetic variation that was, however, not clearly associated to morphological characteristics of ear and stem. Isotopic imprints of chaff on grain Δ were identified as a possible surrogate of the destructive and cumbersome sink-source manipulations to evaluate the contribution of carbon assimilated in ears or re-mobilized from stem. This might facilitate screening of genetic resources and allow the combining of favourable drought tolerance mechanisms in wheat.</description><subject>Agriculture</subject><subject>Carbohydrates</subject><subject>Carbon</subject><subject>Carbon isotopes</subject><subject>Carbon Isotopes - metabolism</subject><subject>Chemical and Process Engineering</subject><subject>Cultivars</subject><subject>Drought</subject><subject>Drought resistance</subject><subject>Dry matter</subject><subject>Engineering Sciences</subject><subject>Food engineering</subject><subject>Genetic diversity</subject><subject>Genetic resources</subject><subject>Genetic screening</subject><subject>Genotype</subject><subject>Genotype & phenotype</subject><subject>Genotypes</subject><subject>Grain</subject><subject>Leaves</subject><subject>Life Sciences</subject><subject>Mediterranean Region</subject><subject>Morphology</subject><subject>Organ Specificity</subject><subject>Organs</subject><subject>Photosynthesis</subject><subject>Physical characteristics</subject><subject>Quantitative Trait, Heritable</subject><subject>Rain</subject><subject>Seeds - genetics</subject><subject>Seeds - growth & development</subject><subject>Shading</subject><subject>Temperature</subject><subject>Triticum - genetics</subject><subject>Triticum - growth & development</subject><subject>Triticum turgidum</subject><subject>Water stress</subject><subject>Wheat</subject><issn>1422-0067</issn><issn>1661-6596</issn><issn>1422-0067</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>8G5</sourceid><sourceid>BENPR</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNpdUU1vEzEQtRCIlsCNM7LEBSQC489dX5CqiKZIQeWQu-Xd9aaOdu0w3g3i3-MqpQo9-c34zZuPR8hbBp-FMPAl7MfMDDAApZ-RSyY5XwLo6vkZviCvct4DcMGVeUkuuOFGaYBLgj8dTqENBzeFFGnq6Rq9j_QWdy5mOqUSuxDpdRiGEHe0wC2GUjGPdJpxF7oCjg5pN2NBa0y_I51j55H-8F2YPKKL3kW6SrGEpUd-TV70bsj-zcO7INvrb9vVzXJzu_6-utosWyn1tGRMyLpXQmqmGi5AtUrJXou-7jrfNY7pqtcaKql432poTF3VQtWs5l42ohIL8vUke5ib0XetjxO6wR4wjA7_2OSC_f8nhju7S0erKlNOo4vAx5PA3ZOym6uNvc8B15wpMEdWuB8emmH6Nfs82THk1g9DWT7N2TJTS65kVUZckPdPqPs0YyyXsJyBKesoqQrr04nVYsoZff84AQN777s9973Q350v-0j-Z7T4C4MdqNo</recordid><startdate>20180101</startdate><enddate>20180101</enddate><creator>Merah, Othmane</creator><creator>Evon, Philippe</creator><creator>Monneveux, Philippe</creator><general>MDPI AG</general><general>MDPI</general><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>3V.</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>8G5</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>K9.</scope><scope>M0S</scope><scope>M1P</scope><scope>M2O</scope><scope>MBDVC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>Q9U</scope><scope>7X8</scope><scope>1XC</scope><scope>VOOES</scope><scope>5PM</scope><orcidid>https://orcid.org/0000-0002-9863-150X</orcidid><orcidid>https://orcid.org/0000-0002-8777-3000</orcidid></search><sort><creationdate>20180101</creationdate><title>Participation of Green Organs to Grain Filling in Triticum turgidum var durum Grown under Mediterranean Conditions</title><author>Merah, Othmane ; 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Environmental and genetic effects on the relative contribution of each organ were examined by analyzing the consequences of sink-source manipulations (shading and excision) and by comparing carbon isotope discrimination (Δ) values in dry matter (at maturity) and sap (two weeks after anthesis) in six durum wheat genotypes grown in two contrasting seasons. The contribution of flag leaf, stem, chaff and awns to grain filling, estimated by sink-source manipulations, highly varied with the season. The contribution of ear photosynthesis and re-mobilization from the stem increased with post-anthesis water stress. They showed a large genetic variation that was, however, not clearly associated to morphological characteristics of ear and stem. Isotopic imprints of chaff on grain Δ were identified as a possible surrogate of the destructive and cumbersome sink-source manipulations to evaluate the contribution of carbon assimilated in ears or re-mobilized from stem. This might facilitate screening of genetic resources and allow the combining of favourable drought tolerance mechanisms in wheat.</abstract><cop>Switzerland</cop><pub>MDPI AG</pub><pmid>29295600</pmid><doi>10.3390/ijms19010056</doi><orcidid>https://orcid.org/0000-0002-9863-150X</orcidid><orcidid>https://orcid.org/0000-0002-8777-3000</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Agriculture Carbohydrates Carbon Carbon isotopes Carbon Isotopes - metabolism Chemical and Process Engineering Cultivars Drought Drought resistance Dry matter Engineering Sciences Food engineering Genetic diversity Genetic resources Genetic screening Genotype Genotype & phenotype Genotypes Grain Leaves Life Sciences Mediterranean Region Morphology Organ Specificity Organs Photosynthesis Physical characteristics Quantitative Trait, Heritable Rain Seeds - genetics Seeds - growth & development Shading Temperature Triticum - genetics Triticum - growth & development Triticum turgidum Water stress Wheat |
| title | Participation of Green Organs to Grain Filling in Triticum turgidum var durum Grown under Mediterranean Conditions |
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