Language:
English
In:
Journal of experimental botany, 2013-01-01, Vol.64 (7), p.1983-1994
Description:
The intra-annual dynamics of wood formation, which involves the passage of newly produced cells through three successive differentiation phases (division, enlargement, and wall thickening) to reach the final functional mature state, has traditionally been described in conifers as three delayed bell-shaped curves followed by an S-shaped curve. Here the classical view represented by the 'Gompertz function (GF) approach' was challenged using two novel approaches based on parametric generalized linear models (GLMs) and 'data-driven' generalized additive models (GAMs). These three approaches (GFs, GLMs, and GAMs) were used to describe seasonal changes in cell numbers in each of the xylem differentiation phases and to calculate the timing of cell development in three conifer species [Picea abies (L.), Pinus sylvestris L., and Abies alba Mill.]. GAMs outperformed GFs and GLMs in describing intra-annual wood formation dynamics, showing two left-skewed bell-shaped curves for division and enlargement, and a right-skewed bimodal curve for thickening. Cell residence times progressively decreased through the season for enlargement, whilst increasing late but rapidly for thickening. These patterns match changes in cell anatomical features within a tree ring, which allows the separation of earlywood and latewood into two distinct cell populations. A novel statistical approach is presented which renews our understanding of xylogenesis, a dynamic biological process in which the rate of cell production interplays with cell residence times in each developmental phase to create complex seasonal patterns.
Subject(s):
Abies - growth & development ; Abies - metabolism ; Biological and medical sciences ; Cambial activity ; Cambial activity, Conifers, Generalized linear and additive models (GLMs and GAMs), Gompertz functions (GFs), Timing of cell development, Tree ring, Wood formation, Xylogenesis ; Cell walls ; Conifers ; Fundamental and applied biological sciences. Psychology ; generalized linear and additive models (GLMs and GAMs) ; Gompertz functions (GFs) ; Growing seasons ; Growth rings ; Latewood ; Life Sciences ; Models, Theoretical ; Parametric models ; Picea - growth & development ; Picea - metabolism ; Pinus - growth & development ; Pinus - metabolism ; Plant physiology and development ; RESEARCH PAPER ; Species ; timing of cell development ; Tracheids ; tree ring ; Wood - growth & development ; Wood - metabolism ; Wood anatomy ; wood formation ; Xylem ; xylogenesis
ISSN:
0022-0957
E-ISSN:
1460-2431
Source:
JSTOR Life Sciences
Source:
JSTOR Ecology & Botany II
Source:
Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals
Source:
Alma/SFX Local Collection
URL:
http://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=27322157$$DView record in Pascal Francis
URL:
https://www.ncbi.nlm.nih.gov/pubmed/23530132$$D View this record in MEDLINE/PubMed
URL:
https://hal.archives-ouvertes.fr/hal-01097955$$DView record in HAL
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