Structure and Function of Intra–Annual Density Fluctuations: Mind the Gaps

Battipaglia, Giovanna; Campelo, Filipe; Vieira, Joana; Grabner, Michael; Micco, Veronica De; Nabais, Cristina; Cherubini, Paolo; Carrer, Marco; Bräuning, Achim; Čufar, Katarina; Filippo, Alfredo Di; García‐González, Ignacio; Koprowski, Marcin; Klisz, Marcin; Kirdyanov, Alexander V.; Zafirov, Nikolay; Luis, Martín de

doi:10.3389/fpls.2016.00595

Cited by 76 publications

(61 citation statements)

References 67 publications

(112 reference statements)

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“…The cell features of the tracheids differentiated during this second period of growth differ from those previously formed in latewood since their cell wall thickness to lumen diameter ratio is lower than what it is observed in latewood, resembling earlywood (Carvalho et al, 2015;Vieira et al, 2015). These earlywood-like cells are referred to as Intra-Annual Density Fluctuations (IADFs; Battipaglia et al, 2016;Campelo et al, 2007;De Micco et al, 2016).…”

Section: Introductionmentioning

confidence: 88%

“…Latewood IADFs are frequently observed in Mediterranean pines (Campelo et al, 2015;de Luis et al, 2011b;Olano et al, 2012;Rozas et al, 2011;Vieira et al, 2010;Zalloni et al, 2016), and depending http://dx.doi.org/10.1016/j.agrformet.2017.02.024 0168-1923/© 2017 Elsevier B.V. All rights reserved. on its position within latewood the IADF can be classified as type L, when the earlywood-like cells are within latewood, or type L + , when the earlywood-like cells are located between latewood and the earlywood of the following tree-ring (Battipaglia et al, 2016;Campelo et al, 2007). Correlation analysis between the frequency of latewood IADFs and climate has revealed that type L is triggered by precipitation events in late summer and early autumn, whereas type L + is related to autumn precipitation (Campelo et al, 2007;Vieira et al, 2010Vieira et al, , 2009.…”

Section: Introductionmentioning

confidence: 99%

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Rain exclusion affects cambial activity in adult maritime pines

Vieira

Nabais

Rossi

et al. 2017

Agricultural and Forest Meteorology

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Drought frequency and intensity are expected to increase in the Mediterranean basin with unforeseen impacts on forest ecosystems. In this study, we investigated the effect of a rain exclusion experiment on the growth dynamics of adult maritime pine trees. The rain exclusion experiment took place from March to October 2014. Cambial activity and xylem development was weekly monitored in five treated and five control trees during the 2014 growing season. Although growth started simultaneously in all trees, the number of differentiating xylem cells and the rates of cell production were reduced in the rain exclusion trees. Rain exclusion reduced the number and the lumen diameter of latewood tracheids. Cell wall thickness was not affected by the treatment. After the summer, both groups of trees resumed cambial activity, with rain exclusion trees resuming growth two weeks later. The second period of cambial activity observed in autumn, produced earlywood-like tracheids after latewood formation, the so called intraannual density fluctuations (IADF). The position of the IADF within latewood differed between groups, being located within and at the end of latewood in control and rain exclusion trees, respectively. These findings demonstrate that the position of IADFs is determined by the timings of cambial reactivation in autumn.

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Section: Introductionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Rain exclusion affects cambial activity in adult maritime pines

Vieira

Nabais

Rossi

et al. 2017

Agricultural and Forest Meteorology

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“…Species adjust their phenology to climate change by shifting or compressing growth and reproduction seasons according to specific regional environmental drivers, local adaptations, and individual plasticity to climate (Nord and Lynch, 2009;Diez et al, 2012). The Mediterranean climate is characterized by a summer drought that forces the cambium into a quiescent or dormant state (Cherubini et al, 2003;Vieira et al, 2014a;Vieira et al, 2015;Battipaglia et al, 2016). Xylogenesis studies in the region have observed that the growing season can stop after the summer, but, under specific climatic conditions associated with water availability, cambial activity can resume after the summer (Camarero et al, 2010;Vieira et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Tree Growth Under Climate Change: Evidence From Xylogenesis Timings and Kinetics

2020

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“…IADFs can be present in earlywood and latewood, being defined as latewood-like cells within earlywood (IADF type E) or by earlywoodlike cells within latewood (IADF type L; Campelo et al, 2007), respectively. In trees growing in the Mediterranean region, earlywood IADFs are formed in response to a drought period during spring and latewood IADFs by above average precipitation in fall (Battipaglia et al, 2016;Campelo et al, 2007). Due to its refined climatic signal, IADFs have been recently used to improve the climatic signal of treering width chronologies (Campelo et al, 2007;Vieira et al, 2010;Wimmer, 2002).…”

Section: Introductionmentioning

confidence: 99%

Dendrochronology of maritime pine in the middle of the Atlantic Ocean

2017

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The Azores Archipelago, located in the North Atlantic Ridge, experiences heavy rainfall and mild temperatures with weak seasonal differences due to oceanic influence. To our knowledge, there have been no dendrochronological studies in the Azores. The aim of this study is to explore the dendrochronological potential of Pinus pinaster Ait. growing in this archipelago and to determine what limiting factor is regulating tree growth. To do so, we have sampled adult maritime pine trees growing in a plantation, in the Pico island of the Azores. Tree ring boundaries were not always easily distinguished, suggesting that in some years cambial activity did not stop during winter. Despite this, it was possible to successfully crossdate the tree-ring series and to establish a tree-ring width chronology with a strong common signal. Climatic correlations revealed a positive response to spring precipitation but no temperature signal in the tree-ring width chronology. Tree-ring width was also negatively correlated with the North Atlantic Oscillation (NAO) and the sea level pressure (SLP) in May − June. Intra-annual density fluctuations (IADFs), which are anatomical features formed in response to variations in environmental conditions during the growing season, were present in 85% of the tree rings. IADFs were identified based on its position within the ring: type E + , characterized as a transition wood from early-to latewood; type L, the most frequent, characterized as earlywood-like cells within latewood; and type L + , characterized as earlywood-like cells between latewood and earlywood of the next tree ring. Each IADF type presented a unique climatic signal: type E + was positively correlated with early summer precipitation and early spring temperature; type L was positively correlated with early autumn precipitation and temperature; and type L + was positively correlated with late autumn precipitation. In conclusion, the tree-ring width chronology established for maritime pine growing in the Pico Island of Azores contains a clear climatic signal for spring precipitation, whereas IADFs frequency correlated better with precipitation later in the growing season. For this reason, we suggest that IADFs should be included in future dendrochronological studies in the Macaronesia Biogeographical region since they can improve the climatic signal present in tree-ring width chronologies.

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Structure and Function of Intra–Annual Density Fluctuations: Mind the Gaps

Cited by 76 publications

References 67 publications

Rain exclusion affects cambial activity in adult maritime pines

Rain exclusion affects cambial activity in adult maritime pines

Tree Growth Under Climate Change: Evidence From Xylogenesis Timings and Kinetics

Dendrochronology of maritime pine in the middle of the Atlantic Ocean

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