Long-term irrigation effects on Spanish holm oak growth and its black truffle symbiont
Von Arx, Georg
Camarero Martínez, Jesús Julio
Sangüesa Barreda, Gabriel
Ruiz Barbarin, José I.
Martínez Peña, Fernando
MetadataShow full item record
The Périgord black truffle is an exclusive culinary delicacy, but its Mediterranean harvests have declined, despite cultivation efforts since the 1970s. The role of long-term irrigation, symbiotic fungus-host interaction, and microbial belowground progression remain poorly understood, because generally
too short experimental settings miss the necessary degree of real world complexity and reliable information from truffle orchards is limited. Here, we conduct the first dendrochronological and wood anatomical assessment of 295 holm oaks, which have been growing under different irrigation intensities in the world's largest truffle orchard in Spain. The relationships between different climatic variables (monthly temperature means and precipitation totals) and dendro-parameters (ring width, vessel count and vessel size) of the oak hosts are utilized to disentangle direct and indirect drivers of truffle fruit body production. Irrigation at medium - instead of high - intensity is most beneficial for oak growth. Non-irrigated trees reveal overall lower stem increments. Warmer temperatures from February to April and wetter conditions from May to July enhance host vitality and possibly also its interplay with fungi symbionts via increased fine root production and mycorrhizal colonization. Adequately irrigated Mediterranean orchards may counteract some of the drought-induced natural truffle decline, and help stabilizing rural tourism, regional agriculture and global markets.
Is part ofAgriculture, Ecosystems and Environment, 2015, vol. 202, p. 148-159
European research projects
Showing items related by title, author, creator and subject.
Colinas, C. (Carlos); Capdevila Subirana, Josep Ma.; Oliach, Daniel; Fischer, Christine; Bonet Lledos, José Antonio (Centre Tecnològic Forestal de Catalunya, 2007)El objetivo de esta monografía es determinar las zonas de Cataluña más adecuadas para el cultivo de la trufa negra (Tuber melanosporum Vitt.). Para conseguir este objetivo, se han considerado los rangos de valores adecuados ...
Mycelial abundance and other factors related to o truffle productivity in Tuber melanosporum - Quercus ilex orchards Suz, Laura M.; María P., Martín; Oliach, Daniel; Fischer, Christine; Colinas, C. (Carlos) (Blackwell, 2008)Relative quantification of DNA from Tuber melanosporum mycelia was performed by conventional and real-time PCR in soil from trees in three truffle orchards of different ages to determine: (1) whether burn appearance ...
Can NPK fertilizers enhance seedling growth and mycorrhizal status of Tuber melanosporum-inoculated Quercus ilex seedlings? Suz, Laura M.; Martín, María P.; Fischer, Christine; Bonet Lledos, José Antonio; Colinas, C. (Carlos) (Springer Verlag, 2010)Although successful cultivation of the black truffle (Tuber melanosporum) has inspired the establishment of widespread truffle orchards in agricultural lands throughout the world, there are many unknowns involved in ...