Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/44362
Title: Adjustment Capacity of Maritime Pine Cambial Activity in Drought-Prone Environments
Authors: Vieira, Joana 
Campelo, Filipe 
Rossi, Sergio 
Carvalho, Ana 
Freitas, Helena 
Nabais, Cristina 
Keywords: Pinus; Seasons; Droughts
Issue Date: 2015
Project: info:eu-repo/grantAgreement/FCT/5876-PPCDTI/111675/PT 
info:eu-repo/grantAgreement/FCT/COMPETE/134910/PT 
Serial title, monograph or event: PLOS ONE
Volume: 10
Issue: 5
Abstract: Intra-annual density fluctuations (IADFs) are anatomical features formed in response to changes in the environmental conditions within the growing season. These anatomical features are commonly observed in Mediterranean pines, being more frequent in younger and wider tree rings. However, the process behind IADF formation is still unknown. Weekly monitoring of cambial activity and wood formation would fill this void. Although studies describing cambial activity and wood formation have become frequent, this knowledge is still fragmentary in the Mediterranean region. Here we present data from the monitoring of cambial activity and wood formation in two diameter classes of maritime pine (Pinus pinaster Ait.), over two years, in order to test: (i) whether the differences in stem diameter in an even-aged stand were due to timings and/or rates of xylogenesis; (ii) if IADFs were more common in large trees; and (iii) if their formation is triggered by cambial resumption after the summer drought. Larger trees showed higher rates of cell production and longer growing seasons, due to an earlier start and later end of xylogenesis. When a drier winter occurs, larger trees were more affected, probably limiting xylogenesis in the summer months. In both diameter classes a latewood IADF was formed in 2012 in response to late-September precipitation, confirming that the timing of the precipitation event after the summer drought is crucial in determining the resumption of cambial activity and whether or not an IADF is formed. It was the first time that the formation of a latewood IADF was monitored at a weekly time scale in maritime pine. The capacity of maritime pine to adjust cambial activity to the current environmental conditions represents a valuable strategy under the future climate change conditions.
URI: http://hdl.handle.net/10316/44362
Other Identifiers: 10.1371/journal.pone.0126223
DOI: 10.1371/journal.pone.0126223
Rights: openAccess
Appears in Collections:I&D CFE - Artigos em Revistas Internacionais

Files in This Item:
File Description SizeFormat
VieiraPlosOne2015.pdf2.44 MBAdobe PDFView/Open
Show full item record

SCOPUSTM   
Citations

36
checked on Jun 25, 2019

WEB OF SCIENCETM
Citations

25
checked on Jun 25, 2019

Page view(s) 5

847
checked on Sep 17, 2019

Download(s)

46
checked on Sep 17, 2019

Google ScholarTM

Check

Altmetric

Dimensions


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.