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Involvement of arbuscular mycorrhizal community in the response of olive trees to drought

AuthorsAroca, Ricardo; Sánchez-Castro, Iván; Cantos, Manuel ; García Fernández, José Luis ; Azcón González de Aguilar, Rosario; Ruiz-Lozano, Juan Manuel; Calvo-Polanco, Mónica
Issue Date16-Nov-2015
Citation2nd World Congress on the use of Biostimulants in Agriculture.16 Nov.2015 in Florence (Italy)
AbstractOleae europea L. is known for its resistance to long-dry periods. One of the first responses of plants to the lack of water within the soil profile will be to adjust their internal water balance by closing the stomata and by adjusting their root hydraulic conductance (Lpr), mainly through the action of aquaporins. Also, the presence of mycorrhizal fungi associate with the tree roots will affect their respond to drought. Arbuscular mycorrhizal (AM) fungi are believed to be able to have a great capacity to resist fast environmental changes under drought conditions, allowing the plants they associate to have a wider range of possibilities to adapt and survive. The present study aims to: 1) describe the different non-described aquaporins present in O. europaea, and 2) to study how different AM communities regulate the response of O. europaea trees to drought in relation to water relations and aquaporine regulation activity. The presence of a more diverse mycorrhizal population in the Grazalema soil induces taller seedlings when growth under well-watered conditions. However, when drought was applied, these differences disappear, and the presence of a fungus for the genera Dominika from the Freila soil become crucial to have more drought-resistant seedlings; with higher Lpr values, higher TIP aquaporin expression, and a higher phosphorylation state of PIP2 aquaporins. We conclude that a combined response to soil structure and mycorrhizal population was the responsible of the responses of O. europaea to drought stress.
DescriptionComunicación oral presentada en The 2nd World Congress on the use of Biostimulants in Agriculture, Florence, Italy 16-19 de Noviembre de 2015 P140 (A160) Involvement.... organizado por New Ag International SARL
Publisher version (URL)http://www.biostimulants2015.com/
Appears in Collections:(IRNAS) Comunicaciones congresos
(EEZ) Comunicaciones congresos
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