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Effects of different arbuscular mycorrhizal fungal backgrounds and soils on olive plants growth and water relation properties under well‐watered and drought conditions
Author(s) -
CalvoPolanco Monica,
SánchezCastro Iván,
Cantos Manuel,
García José Luis,
Azcón Rosario,
RuizLozano Juan Manuel,
Beuzón Carmen R.,
Aroca Ricardo
Publication year - 2016
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/pce.12807
Subject(s) - soil water , mycorrhizal fungi , arbuscular mycorrhizal , arbuscular mycorrhizal fungi , biology , agronomy , mycorrhiza , environmental science , symbiosis , botany , horticulture , ecology , inoculation , bacteria , genetics
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 from diverse soils on olive plant growth and water 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 ( L p r ) 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 L p r , indicating how the interaction of different aquaporins may render diverse L p r values.