Effects of different arbuscular mycorrhizal fungal backgrounds and soils on olive plants growth and water relation properties under well-watered and drought conditions - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Plant, Cell and Environment Année : 2016

Effects of different arbuscular mycorrhizal fungal backgrounds and soils on olive plants growth and water relation properties under well-watered and drought conditions

Résumé

The adaptation capacity of olive trees to different environments is well recognized. However, the presence of microorganisms in the soil is also a key factor in the response of these trees to drought. The objective of the present study was to elucidate the effects of different arbuscular mycorrhizal (AM) fungi coming fromdiverse soils on olive plant growth andwater relations. Olive plants were inoculated with native AM fungal populations from two contrasting environments, that is, semi-arid – Freila (FL) and humid – Grazalema (GZ) regions, and subjected to drought stress. Results showed that plants grew better on GZ soil inoculated with GZ fungi, indicating a preference of AM fungi for their corresponding soil. Furthermore, under these conditions, the highest AM fungal diversity was found. However, the highest root hydraulic conductivity (Lpr) value was achieved by plants inoculated with GZ fungi and growing in FL soil under drought conditions. So, this AM inoculum also functioned in soils from different origins. Nine novel aquaporin genes were also cloned from olive roots. Diverse correlation and association values were found among different aquaporin expressions and abundances and Lpr, indicating how the interaction of different aquaporins may render diverse Lpr values.

Dates et versions

hal-01595061 , version 1 (26-09-2017)

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Maria Monica Calvo-Polanco, Iván Sánchez-Castro, Manuel Cantos, José Luis García, Rosario Azcón, et al.. Effects of different arbuscular mycorrhizal fungal backgrounds and soils on olive plants growth and water relation properties under well-watered and drought conditions. Plant, Cell and Environment, 2016, 39 (11), pp.2498-2514. ⟨10.1111/pce.12807⟩. ⟨hal-01595061⟩
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