Wood anatomy and wood density in shrubs: Responses to varying aridity along transcontinental transects

Martínez‐Cabrera, Hugo I.; Jones, Cynthia S.; Espino, Susana; Schenk, H. Jochen

doi:10.3732/ajb.0800237

American J of Botany

2009

DOI: 10.3732/ajb.0800237

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Wood anatomy and wood density in shrubs: Responses to varying aridity along transcontinental transects

Hugo I. Martínez‐Cabrera

¹

,

Cynthia S. Jones

²

,

Susana Espino

³

et al.

Abstract: Wood density plays a key role in ecological strategies and life history variation in woody plants, but little is known about its anatomical basis in shrubs. We quantified the relationships between wood density, anatomy, and climate in 61 shrub species from eight field sites along latitudinal belts between 31° and 35° in North and South America. Measurements included cell dimensions, transverse areas of each xylem cell type and percentage contact between different cell types and vessels. Wood density was more s… Show more

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Cited by 231 publications

(255 citation statements)

References 77 publications

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23

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212

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“…Wood density was also negative correlated with fibre lumen, showing that the increase in wood density was driven by a decrease in fibres diameter and lumen, which would mean that having more fibres with a smaller diameter makes them heavier. This is consistent with previous works ( Jacobsen et al 2005 ; Martínez-Cabrera et al 2009 ) that showed that denser woods had more fibre cells per unit area than lighter woods ( Martínez-Cabrera et al 2009 ; Ziemińska et al 2015 ). The variation in wood density across species has been explained by changes in the fibre wall and lumen fractions ( Zanne et al 2010 ; Ziemińska et al 2013 ), and as a response to environmental conditions as temperature or precipitation ( Swenson and Enquist 2007 ; Martínez-Cabrera et al 2009 ) although not in all studies.…”

Section: Discussionsupporting

confidence: 93%

“…This is consistent with previous works ( Jacobsen et al 2005 ; Martínez-Cabrera et al 2009 ) that showed that denser woods had more fibre cells per unit area than lighter woods ( Martínez-Cabrera et al 2009 ; Ziemińska et al 2015 ). The variation in wood density across species has been explained by changes in the fibre wall and lumen fractions ( Zanne et al 2010 ; Ziemińska et al 2013 ), and as a response to environmental conditions as temperature or precipitation ( Swenson and Enquist 2007 ; Martínez-Cabrera et al 2009 ) although not in all studies. In lowlands, the high temperatures (30 °C mean annual temperature; 36 °C maximum temperature of the driest quarter) in combination with periodic water deficits lead to narrower vessels immersed in a matrix of high-density wood due to the higher proportion of xylem occupied by smaller fibres, which increase the resistance to implosion ( Jacobsen et al 2007 ; Fortunel et al 2014 ).…”

Section: Discussionsupporting

confidence: 93%

See 1 more Smart Citation

The role of wood anatomical traits in the coexistence of oak species along an environmental gradient

Arenas‐Navarro

¹

,

Oyama

²

,

García‐Oliva

³

et al. 2021

Get access via publisher Add to dashboard Cite

Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.

show abstract

“…Wood density was also negative correlated with fibre lumen, showing that the increase in wood density was driven by a decrease in fibres diameter and lumen, which would mean that having more fibres with a smaller diameter makes them heavier. This is consistent with previous works ( Jacobsen et al 2005 ; Martínez-Cabrera et al 2009 ) that showed that denser woods had more fibre cells per unit area than lighter woods ( Martínez-Cabrera et al 2009 ; Ziemińska et al 2015 ). The variation in wood density across species has been explained by changes in the fibre wall and lumen fractions ( Zanne et al 2010 ; Ziemińska et al 2013 ), and as a response to environmental conditions as temperature or precipitation ( Swenson and Enquist 2007 ; Martínez-Cabrera et al 2009 ) although not in all studies.…”

Section: Discussionsupporting

confidence: 93%

“…This is consistent with previous works ( Jacobsen et al 2005 ; Martínez-Cabrera et al 2009 ) that showed that denser woods had more fibre cells per unit area than lighter woods ( Martínez-Cabrera et al 2009 ; Ziemińska et al 2015 ). The variation in wood density across species has been explained by changes in the fibre wall and lumen fractions ( Zanne et al 2010 ; Ziemińska et al 2013 ), and as a response to environmental conditions as temperature or precipitation ( Swenson and Enquist 2007 ; Martínez-Cabrera et al 2009 ) although not in all studies. In lowlands, the high temperatures (30 °C mean annual temperature; 36 °C maximum temperature of the driest quarter) in combination with periodic water deficits lead to narrower vessels immersed in a matrix of high-density wood due to the higher proportion of xylem occupied by smaller fibres, which increase the resistance to implosion ( Jacobsen et al 2007 ; Fortunel et al 2014 ).…”

Section: Discussionsupporting

confidence: 93%

The role of wood anatomical traits in the coexistence of oak species along an environmental gradient

Arenas‐Navarro

¹

,

Oyama

²

,

García‐Oliva

³

et al. 2021

Get access via publisher Add to dashboard Cite

Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.

show abstract

“…Within the data set of this study, there was notable variation in the wood parenchyma fractions, which agreed with previous studies (Figure 3) (Fujiwara et al, 1991;Martínez-Cabrera et al, 2009;Zheng and Martínez-Cabrera, 2013; Ziemińska . Among these variations, AP fractions exhibited significant diversity between species.…”

Section: Discussionsupporting

confidence: 92%

Tree height and not climate influences intraspecific variations in wood parenchyma fractions of angiosperm species in a mountain forest of eastern China

Wu

¹

,

Zhou

²

,

Wang

³

et al. 2025

American J of Botany

1

0

Get access via publisher Add to dashboard Cite

Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.

show abstract

“…; Martínez‐Cabrera et al. ), and is also concordant with previous reports from latitudinal gradients where any increase in hydraulic availability and temperature favours increases in tree height (Méndez‐Alonzo et al. ; Moles et al.…”

Section: Discussionsupporting

confidence: 92%

Altitudinal changes in tree leaf and stem functional diversity in a semi‐tropical mountain

Hernández‐Calderón

¹

,

Méndez‐Alonzo²,

Martínez‐Cruz

³

et al. 2014

J Vegetation Science

Get access via publisher Add to dashboard Cite

Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.

show abstract

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