Arbuscular mycorrhizal symbiosis increases relative apoplastic water flow in roots of the host plant under both well-watered and drought stress conditions
Identifieur interne : 000108 ( Ncbi/Checkpoint ); précédent : 000107; suivant : 000109Arbuscular mycorrhizal symbiosis increases relative apoplastic water flow in roots of the host plant under both well-watered and drought stress conditions
Auteurs : Gloria Bárzana [Espagne] ; Ricardo Aroca [Espagne] ; José Antonio Paz [Espagne] ; François Chaumont [Belgique] ; Mari Carmen Martinez-Ballesta [Espagne] ; Micaela Carvajal [Espagne] ; Juan Manuel Ruiz-Lozano [Espagne]Source :
- Annals of Botany [ 0305-7364 ] ; 2012.
Abstract
The movement of water through mycorrhizal fungal tissues and between the fungus and roots is little understood. It has been demonstrated that arbuscular mycorrhizal (AM) symbiosis regulates root hydraulic properties, including root hydraulic conductivity. However, it is not clear whether this effect is due to a regulation of root aquaporins (cell-to-cell pathway) or to enhanced apoplastic water flow. Here we measured the relative contributions of the apoplastic versus the cell-to-cell pathway for water movement in roots of AM and non-AM plants.
We used a combination of two experiments using the apoplastic tracer dye light green SF yellowish and sodium azide as an inhibitor of aquaporin activity. Plant water and physiological status, root hydraulic conductivity and apoplastic water flow were measured.
Roots of AM plants enhanced significantly relative apoplastic water flow as compared with non-AM plants and this increase was evident under both well-watered and drought stress conditions. The presence of the AM fungus in the roots of the host plants was able to modulate the switching between apoplastic and cell-to-cell water transport pathways.
The ability of AM plants to switch between water transport pathways could allow a higher flexibility in the response of these plants to water shortage according to the demand from the shoot.
Url:
DOI: 10.1093/aob/mcs007
PubMed: 22294476
PubMed Central: 3310489
Affiliations:
- Belgique, Espagne
- Andalousie, Province du Brabant wallon, Région de Murcie, Région wallonne
- Louvain-la-Neuve
- Université catholique de Louvain
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del Zaidín (EEZ-CSIC), Profesor Albareda no. 1, 18008 Granada</wicri:regionArea><placeName><region nuts="2" type="communauté">Andalousie</region></placeName></affiliation></author><author><name sortKey="Aroca, Ricardo" sort="Aroca, Ricardo" uniqKey="Aroca R" first="Ricardo" last="Aroca">Ricardo Aroca</name><affiliation wicri:level="2"><nlm:aff id="af1"><addr-line>Departamento de Microbiología del Suelo y Sistemas Simbióticos, Estación Experimental del Zaidín (EEZ-CSIC), Profesor Albareda no. 1, 18008 Granada, Spain</addr-line></nlm:aff><country xml:lang="fr">Espagne</country><wicri:regionArea>Departamento de Microbiología del Suelo y Sistemas Simbióticos, Estación Experimental del Zaidín (EEZ-CSIC), Profesor Albareda no. 1, 18008 Granada</wicri:regionArea><placeName><region nuts="2" type="communauté">Andalousie</region></placeName></affiliation></author><author><name sortKey="Paz, Jose Antonio" sort="Paz, Jose Antonio" uniqKey="Paz J" first="José Antonio" last="Paz">José Antonio Paz</name><affiliation wicri:level="2"><nlm:aff id="af1"><addr-line>Departamento de Microbiología del Suelo y Sistemas Simbióticos, Estación Experimental del Zaidín (EEZ-CSIC), Profesor Albareda no. 1, 18008 Granada, Spain</addr-line></nlm:aff><country xml:lang="fr">Espagne</country><wicri:regionArea>Departamento de Microbiología del Suelo y Sistemas Simbióticos, Estación Experimental del Zaidín (EEZ-CSIC), Profesor Albareda no. 1, 18008 Granada</wicri:regionArea><placeName><region nuts="2" type="communauté">Andalousie</region></placeName></affiliation></author><author><name sortKey="Chaumont, Francois" sort="Chaumont, Francois" uniqKey="Chaumont F" first="François" last="Chaumont">François Chaumont</name><affiliation wicri:level="4"><nlm:aff id="af2"><addr-line>Institut des Sciences de la Vie, Université catholique de Louvain, Croix du Sud 4-15, B-1348, Louvain-la-Neuve, Belgium</addr-line></nlm:aff><country xml:lang="fr">Belgique</country><wicri:regionArea>Institut des Sciences de la Vie, Université catholique de Louvain, Croix du Sud 4-15, B-1348, Louvain-la-Neuve</wicri:regionArea><orgName type="university">Université catholique de Louvain</orgName><placeName><settlement type="city">Louvain-la-Neuve</settlement><region type="region" nuts="1">Région wallonne</region><region type="province" nuts="1">Province du Brabant wallon</region></placeName></affiliation></author><author><name sortKey="Martinez Ballesta, Mari Carmen" sort="Martinez Ballesta, Mari Carmen" uniqKey="Martinez Ballesta M" first="Mari Carmen" last="Martinez-Ballesta">Mari Carmen Martinez-Ballesta</name><affiliation wicri:level="2"><nlm:aff id="af3"><addr-line>Centro de Edafología y Biología Aplicada del Segura (CEBAS-CSIC), Department of Plant Nutrition, PO Box 164, Campus de Espinardo 30100-Murcia, Spain</addr-line></nlm:aff><country xml:lang="fr">Espagne</country><wicri:regionArea>Centro de Edafología y Biología Aplicada del Segura (CEBAS-CSIC), Department of Plant Nutrition, PO Box 164, Campus de Espinardo 30100-Murcia</wicri:regionArea><placeName><region nuts="2" type="communauté">Région de Murcie</region></placeName></affiliation></author><author><name sortKey="Carvajal, Micaela" sort="Carvajal, Micaela" uniqKey="Carvajal M" first="Micaela" last="Carvajal">Micaela Carvajal</name><affiliation wicri:level="2"><nlm:aff id="af3"><addr-line>Centro de Edafología y Biología Aplicada del Segura (CEBAS-CSIC), Department of Plant Nutrition, PO Box 164, Campus de Espinardo 30100-Murcia, Spain</addr-line></nlm:aff><country xml:lang="fr">Espagne</country><wicri:regionArea>Centro de Edafología y Biología Aplicada del Segura (CEBAS-CSIC), Department of Plant Nutrition, PO Box 164, Campus de Espinardo 30100-Murcia</wicri:regionArea><placeName><region nuts="2" type="communauté">Région de Murcie</region></placeName></affiliation></author><author><name sortKey="Ruiz Lozano, Juan Manuel" sort="Ruiz Lozano, Juan Manuel" uniqKey="Ruiz Lozano J" first="Juan Manuel" last="Ruiz-Lozano">Juan Manuel Ruiz-Lozano</name><affiliation wicri:level="2"><nlm:aff id="af1"><addr-line>Departamento de Microbiología del Suelo y Sistemas Simbióticos, Estación Experimental del Zaidín (EEZ-CSIC), Profesor Albareda no. 1, 18008 Granada, Spain</addr-line></nlm:aff><country xml:lang="fr">Espagne</country><wicri:regionArea>Departamento de Microbiología del Suelo y Sistemas Simbióticos, Estación Experimental del Zaidín (EEZ-CSIC), Profesor Albareda no. 1, 18008 Granada</wicri:regionArea><placeName><region nuts="2" type="communauté">Andalousie</region></placeName></affiliation></author></analytic><series><title level="j">Annals of Botany</title><idno type="ISSN">0305-7364</idno><idno type="eISSN">1095-8290</idno><imprint><date when="2012">2012</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec><title>Background and Aims</title><p>The movement of water through mycorrhizal fungal tissues and between the fungus and roots is little understood. It has been demonstrated that arbuscular mycorrhizal (AM) symbiosis regulates root hydraulic properties, including root hydraulic conductivity. However, it is not clear whether this effect is due to a regulation of root aquaporins (cell-to-cell pathway) or to enhanced apoplastic water flow. Here we measured the relative contributions of the apoplastic versus the cell-to-cell pathway for water movement in roots of AM and non-AM plants.</p></sec><sec><title>Methods</title><p>We used a combination of two experiments using the apoplastic tracer dye light green SF yellowish and sodium azide as an inhibitor of aquaporin activity. Plant water and physiological status, root hydraulic conductivity and apoplastic water flow were measured.</p></sec><sec><title>Key Results</title><p>Roots of AM plants enhanced significantly relative apoplastic water flow as compared with non-AM plants and this increase was evident under both well-watered and drought stress conditions. The presence of the AM fungus in the roots of the host plants was able to modulate the switching between apoplastic and cell-to-cell water transport pathways.</p></sec><sec><title>Conclusions</title><p>The ability of AM plants to switch between water transport pathways could allow a higher flexibility in the response of these plants to water shortage according to the demand from the shoot.</p></sec></div></front></TEI><affiliations><list><country><li>Belgique</li><li>Espagne</li></country><region><li>Andalousie</li><li>Province du Brabant wallon</li><li>Région de Murcie</li><li>Région wallonne</li></region><settlement><li>Louvain-la-Neuve</li></settlement><orgName><li>Université catholique de Louvain</li></orgName></list><tree><country name="Espagne"><region name="Andalousie"><name sortKey="Barzana, Gloria" sort="Barzana, Gloria" uniqKey="Barzana G" first="Gloria" last="Bárzana">Gloria Bárzana</name></region><name sortKey="Aroca, Ricardo" sort="Aroca, Ricardo" uniqKey="Aroca R" first="Ricardo" last="Aroca">Ricardo Aroca</name><name sortKey="Carvajal, Micaela" sort="Carvajal, Micaela" uniqKey="Carvajal M" first="Micaela" last="Carvajal">Micaela Carvajal</name><name sortKey="Martinez Ballesta, Mari Carmen" sort="Martinez Ballesta, Mari Carmen" uniqKey="Martinez Ballesta M" first="Mari Carmen" last="Martinez-Ballesta">Mari Carmen Martinez-Ballesta</name><name sortKey="Paz, Jose Antonio" sort="Paz, Jose Antonio" uniqKey="Paz J" first="José Antonio" last="Paz">José Antonio Paz</name><name sortKey="Ruiz Lozano, Juan Manuel" sort="Ruiz Lozano, Juan Manuel" uniqKey="Ruiz Lozano J" first="Juan Manuel" last="Ruiz-Lozano">Juan Manuel Ruiz-Lozano</name></country><country name="Belgique"><region name="Région wallonne"><name sortKey="Chaumont, Francois" sort="Chaumont, Francois" uniqKey="Chaumont F" first="François" last="Chaumont">François Chaumont</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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