Xylem plasticity in Pinus pinaster and Quercus ilex growing at sites with different water availability in the Mediterranean region : relations between intra-annual density fluctuations and environmental conditions

Balzano, Angela (avtor), Battipaglia, Giovanna (avtor), Cherubini, Paolo (avtor), De Micco, Veronica (avtor)

Fluctuations in climatic conditions during the growing season are recorded in Mediterranean tree-rings and often result in intra-annual density fluctuations (IADFs). Dendroecology and quantitative wood anatomy analyses were used to characterize the relations between the variability of IADF traits and climatic drivers in Pinus pinaster Aiton and Quercus ilex L. growing at sites with different water availability on the Elba island in Central Italy. Our results showed that both species present high xylem plasticity resulting in the formation of L-type IADFs (L-IADFs), consisting of earlywood-like cells in latewood. The occurrence of such IADFs was linked to rain events following periods of summer drought. The formation of L-IADFs in both species increased the hydraulic conductivity late in the growing season, due to their larger lumen area in comparison to "true latewood". The two species expressed greater similarity under arid conditions, as unfavorable climates constrained trait variation. Wood density, measured as the percentage of cell walls over total xylem area, IADF frequency, as well as conduit lumen area and vessel frequency, specifically in the hardwood species, proved to be efficient proxies to encode climate signals recorded in the xylem. The response of these anatomical traits to climatic variations was found to be species- and site-specific.

• Jezik: Angleški jezik
• Ključne besede: false rings, Mediterranean ecosystems, oak, pine, tree-rings, wood anatomical traits
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: BF - Biotehniška fakulteta
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2020
• Št. strani: 19 str.
• Številčenje: Vol. 11, iss. 4, art. 379
• PID: 20.500.12556/RUL-133429
• UDK: 630*1
• ISSN pri članku: 1999-4907
• DOI: 10.3390/f11040379
• COBISS.SI-ID: 3201161
• Datum objave v RUL: 26.11.2021

Gradivo je del revije

• Naslov: Forests
• Skrajšan naslov: Forests
• Založnik: MDPI
• ISSN: 1999-4907
• COBISS.SI-ID: 3872166

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 01.04.2020

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: gostotne fluktuacije, sredozemski ekosistemi, hrast, branike, anatomija lesa