Key message: Easily measurable functional traits can be used as proxies in the selection of drought-tolerant saplings for reforestation in Mediterranean ecosystems. Abstract: Heat and drought events—increasing both in frequency and severity—have led to forest decline, and are a serious threat for the Mediterranean biome. Whereas drought tolerance of adult trees of different Mediterranean species has been widely investigated, this is not the case for saplings and young trees. We analysed correlations and trade-offs among leaf (water potential at the turgor loss point, Ψtlp, modulus of elasticity, ε, osmotic potential at full turgor, π0, leaf capacitance, Cleaf_dw, leaf venation, VLA, leaf mass per area, LMA) and stem (wood capacitance and wood density, Cwood and Dwood, stem-specific conductivity and water potential inducing 50% loss of hydraulic conductance) functional traits of saplings for 14 woody species of the Mediterranean flora. The results support previously reported correlations among functional traits known to confer drought tolerance to plants. In particular, Ψtlp was positively correlated to π0, Cleaf_dw and VLA, while negatively correlated to ε and LMA. A highly significant correlation was highlighted between Cwood and Dwood. Overall, we observed surprisingly low symplastic and apoplastic resistance. We identify some easily measurable traits (π0 and LMA), which evidence seedlings’ ability to cope with drought, and which therefore could be used as proxies in the selection of drought-tolerant saplings for reforestation in Mediterranean areas.

Morpho-anatomical and physiological traits in saplings of drought-tolerant Mediterranean woody species

SAVI, TADEJA;LOVE, VERONICA LEE;DAL BORGO, ANNA;MARTELLOS, Stefano;NARDINI, Andrea
2017-01-01

Abstract

Key message: Easily measurable functional traits can be used as proxies in the selection of drought-tolerant saplings for reforestation in Mediterranean ecosystems. Abstract: Heat and drought events—increasing both in frequency and severity—have led to forest decline, and are a serious threat for the Mediterranean biome. Whereas drought tolerance of adult trees of different Mediterranean species has been widely investigated, this is not the case for saplings and young trees. We analysed correlations and trade-offs among leaf (water potential at the turgor loss point, Ψtlp, modulus of elasticity, ε, osmotic potential at full turgor, π0, leaf capacitance, Cleaf_dw, leaf venation, VLA, leaf mass per area, LMA) and stem (wood capacitance and wood density, Cwood and Dwood, stem-specific conductivity and water potential inducing 50% loss of hydraulic conductance) functional traits of saplings for 14 woody species of the Mediterranean flora. The results support previously reported correlations among functional traits known to confer drought tolerance to plants. In particular, Ψtlp was positively correlated to π0, Cleaf_dw and VLA, while negatively correlated to ε and LMA. A highly significant correlation was highlighted between Cwood and Dwood. Overall, we observed surprisingly low symplastic and apoplastic resistance. We identify some easily measurable traits (π0 and LMA), which evidence seedlings’ ability to cope with drought, and which therefore could be used as proxies in the selection of drought-tolerant saplings for reforestation in Mediterranean areas.
Pubblicato
https://link.springer.com/article/10.1007%2Fs00468-017-1533-7
File in questo prodotto:
File Dimensione Formato  
Savi et al..pdf

Accesso chiuso

Tipologia: Documento in Versione Editoriale
Licenza: Digital Rights Management non definito
Dimensione 933.02 kB
Formato Adobe PDF
933.02 kB Adobe PDF   Visualizza/Apri   Richiedi una copia
suppl. mat..pdf

Accesso chiuso

Descrizione: supplementary materials
Tipologia: Altro materiale allegato
Licenza: Digital Rights Management non definito
Dimensione 195.52 kB
Formato Adobe PDF
195.52 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2901359
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 22
  • ???jsp.display-item.citation.isi??? 19
social impact