title Plastic Response of Tracheids in Pinus pinaster in a Water-Limited Environment: Adjusting Lumen Size instead of Wall Thickness
authors Carvalho, A; Nabais, C; Vieira, J; Rossi, S; Campelo, F
author full name Carvalho, Ana; Nabais, Cristina; Vieira, Joana; Rossi, Sergio; Campelo, Filipe
nationality nacional
source PLOS ONE
language English
document type Article
keywords plus INTRAANNUAL DENSITY-FLUCTUATIONS; TREE-RING GROWTH; MEDITERRANEAN CLIMATE; WOOD STRUCTURE; XYLEM ANATOMY; XYLOGENESIS; DROUGHT; STRESS; WIDTH; AGE
abstract The formation of wood results from cambial activity and its anatomical properties reflect the variability of environmental conditions during the growing season. Recently, it was found that wood density variations in conifers growing under cold-limited environment result from the adjustment of cell wall thickness (CWT) to temperature. Additionally, it is known that intra-annual density fluctuations (IADFs) are formed in response to precipitation after the summer drought. Although IADFs are frequent in Mediterranean conifers no study has yet been conducted to determine if these structures result from the adjustment of lumen diameter (LD) or CWT to soil water availability. Our main objective is to investigate the intra-ring variation of wood anatomical features (LD and CWT) in Pinus pinaster Ait. growing under a water-limited environment. We compared the tracheidograms of LD and CWT for the years 2010-2013 in P. pinaster growing in the west coast of Portugal. Our results suggest a close association between LD and soil moisture content along the growing season, reinforcing the role of water availability in determining tracheid size. Compared with CWT, LD showed a higher intra-and inter-annual variability suggesting its strong adjustment value to variations in water availability. The formation of a latewood IADF appears to be predisposed by higher rates of cell production in spring and triggered by early autumn precipitation. Our findings reinforce the crucial role of water availability on cambial activity and wood formation in Mediterranean conifers, and emphasize the high plasticity of wood anatomical features under Mediterranean climate.
author address [Carvalho, Ana; Nabais, Cristina; Vieira, Joana; Campelo, Filipe] Univ Coimbra, Dept Life Sci, CFE Ctr Funct Ecol, P-3000456 Coimbra, Portugal; [Rossi, Sergio] Univ Quebec Chicoutimi, Dept Sci Fondament, Chicoutimi, PQ, Canada; [Rossi, Sergio] Chinese Acad Sci, Prov Key Lab Appl Bot South China Bot Garden, Key Lab Vegetat Restorat & Management Degraded Ec, Guangzhou, Guangdong, Peoples R China
reprint address Campelo, F (reprint author), Univ Coimbra, Dept Life Sci, CFE Ctr Funct Ecol, P-3000456 Coimbra, Portugal.
e-mail address fcampelo@uc.pt
funding agency and grant number Fundacao para a Ciencia e a Tecnologia, Ministerio da Educacao e Ciencia (FCT); Compete [PTDC/AAC-AMB/111675/2009, EXPL/AAG-GLO/1885/2013]; CFE strategic program [UI0134-UID/BIA/04004/2013]; FCT [SFRH/BPD/47822/2008]; POPH (Portuguese Operational Human Potential Program); QREN Portugal (Portuguese National Strategic Reference Framework)
funding text This study was supported by the Fundacao para a Ciencia e a Tecnologia, Ministerio da Educacao e Ciencia (FCT) co-financed by Compete, through the projects PTDC/AAC-AMB/111675/2009 and EXPL/AAG-GLO/1885/2013, and CFE strategic program UI0134-UID/BIA/04004/2013. Filipe Campelo was supported by a postdoctoral research grant (SFRH/BPD/47822/2008) from FCT with funds from POPH (Portuguese Operational Human Potential Program) and QREN Portugal (Portuguese National Strategic Reference Framework).
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cited reference count 50
publisher PUBLIC LIBRARY SCIENCE
publisher city SAN FRANCISCO
publisher address 1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA
issn 1932-6203
29-character source abbreviation PLOS ONE
iso source abbreviation PLoS One
publication date AUG 25
year published 2015
volume 10
issue 8
article number e0136305
digital object identifier (doi) 10.1371/journal.pone.0136305
page count 14
web of science category Multidisciplinary Sciences
subject category Science & Technology - Other Topics
document delivery number CP6KK
unique article identifier WOS:000359995500063
CFE authors
Ana Luísa Carvalho
Cristina Nabais
Filipe Campelo
Joana Vieira