High intraspecific variability of stomatal and leaf traits controlled by the interaction of adaptation

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高度种内变异的气孔和叶片特征由适应性相互作用控制

Alta variabilidade intraespecífica de características estomáticas e foliares controladas pela interação de adaptação.

Alta variabilidad intraespecífica de características estomáticas y foliares controladas por la interacción de adaptación.

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Interannual adjustments in stomatal and leaf morphological traits of European beech (Fagus sylvatica L.) demonstrate its climate change acclimation potential

Petrik P., Petek-Petrik A., Kurjak D., Mukarram M., Klein T., Gömöry D.,  Střelcová K., Frýdl J., Konôpková A. (2022)

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Plant Biology 24(7): 1287-1296 – Special Issue: Responses of European forests to global change‐type droughts – https://doi.org/10.1111/plb.13401 –

https://onlinelibrary.wiley.com/doi/10.1111/plb.13401

ABSTRACT

• The current projections of climate change might exceed the ability of European forest trees to adapt to upcoming environmental conditions. However, stomatal and leaf morphological traits could greatly influence the acclimation potential of forest tree species subjected to global warming, including the single most important forestry species in Europe, European beech.
• We analysed stomatal (guard cell length, stomatal density and potential conductance index) and leaf (leaf area, leaf dry weight and leaf mass per area) morphological traits of ten provenances from two provenance trials with contrasting climates between 2016 and 2020. The impact of meteorological conditions of the current and preceding year on stomatal and leaf traits was tested by linear and quadratic regressions. Ecodistance was used to capture the impact of adaptation after the transfer of provenances to new environments.
• Interactions of trial–provenance and trial–year factors were significant for all measured traits. Guard cell length was lowest and stomatal density was highest across beech provenances in the driest year, 2018. Adaptation was also reflected in a significant relationship between aridity ecodistance and measured traits. Moreover, the meteorological conditions of the preceding year affected the interannual variability of stomatal and leaf traits more than the meteorological conditions of the spring of the current year, suggesting the existence of plant stress memory.
• High intraspecific variability of stomatal and leaf traits controlled by the interaction of adaptation, acclimation and plant memory suggests a high acclimation potential of European beech provenances under future conditions of global climate change.

Stomatal sensitivity to leaf water potential strongly relates to xylem characteristics

 

The variability of stomatal sensitivity to leaf water potential across tree species indicates a continuum between isohydric and anisohydric behaviours

by Klein T.

(2014)

in Functional Ecology Volume 28, Issue 6 December 2014  Pages 1313–1320 – DOI: 10.1111/1365-2435.12289 – 

http://onlinelibrary.wiley.com/doi/10.1111/1365-2435.12289/abstract

Summary

1. The relationship between stomatal conductance (gs) and leaf water potential (Ψl) is key to the understanding of plant function under changing climate. The variability among tree species gave rise to selection towards either of two contrasting water management types: isohydric or anisohydric. This study explores the variability of gs to Ψl across tree species.
2. Curves of gs(Ψl) were collected from the scientific literature for 70 woody plant species. The data set is comprised of angiosperm and gymnosperm species from all major forest biomes. The hypothesis that curves from different tree species diverge between isohydric and anisohydric behaviours was tested.
3. Species-specific curves formed a continuum, rather than dichotomy between isohydric and anisohydric, as confirmed by distribution models. Alternatively, the water potential at 50% of the maximum gs (Ψgs50) was used to quantitatively compare between species. A major difference emerged among xylem anatomy classes whereby ring-porous species had higher absolute gs at Ψl < −2 MPa than diffuse-porous and coniferous species. A positive, linear correlation was shown between Ψgs50 and Ψl at 50% loss of xylem conductivity.
4. The results suggest that stomatal sensitivity to leaf water potential strongly relates to xylem characteristics. The use of Ψgs50 offers a quantitative alternative to the current, yet biased, distinction between isohydric and anisohydric species.

Stomatal sensitivity to leaf water potential strongly relates to xylem characteristics

The variability of stomatal sensitivity to leaf water potential across tree species indicates a continuum between isohydric and anisohydric behaviours

by Klein T. (2014)

in Funct Ecol 28:1313–1320. – doi:10.1111/1365-2435.12289 –

CrossRef. – 

http://onlinelibrary.wiley.com/doi/10.1111/1365-2435.12289/abstract

Summary

1. The relationship between stomatal conductance (g_s) and leaf water potential (Ψ_l) is key to the understanding of plant function under changing climate. The variability among tree species gave rise to selection towards either of two contrasting water management types: isohydric or anisohydric. This study explores the variability of g_s to Ψ_l across tree species.
2. Curves of g_s(Ψ_l) were collected from the scientific literature for 70 woody plant species. The data set is comprised of angiosperm and gymnosperm species from all major forest biomes. The hypothesis that curves from different tree species diverge between isohydric and anisohydric behaviours was tested.
3. Species-specific curves formed a continuum, rather than dichotomy between isohydric and anisohydric, as confirmed by distribution models. Alternatively, the water potential at 50% of the maximum g_s (Ψg_s50) was used to quantitatively compare between species. A major difference emerged among xylem anatomy classes whereby ring-porous species had higher absolute g_s at Ψ_l < −2 MPa than diffuse-porous and coniferous species. A positive, linear correlation was shown between Ψg_s50 and Ψ_l at 50% loss of xylem conductivity.
4. The results suggest that stomatal sensitivity to leaf water potential strongly relates to xylem characteristics. The use of Ψg_s50 offers a quantitative alternative to the current, yet biased, distinction between isohydric and anisohydric species.

See the text: Wiley

Stomatal sensitivity to leaf water potential strongly relates to xylem characteristics

 

The variability of stomatal sensitivity to leaf water potential across tree species indicates a continuum between isohydric and anisohydric behaviours

by Klein T. (2014)

in Functional Ecology, Volume 28, Issue 6, pages 1313–1320, December 2014

Summary

1. The relationship between stomatal conductance (g_s) and leaf water potential (Ψ_l) is key to the understanding of plant function under changing climate. The variability among tree species gave rise to selection towards either of two contrasting water management types: isohydric or anisohydric. This study explores the variability of g_s to Ψ_l across tree species.
2. Curves of g_s(Ψ_l) were collected from the scientific literature for 70 woody plant species. The data set is comprised of angiosperm and gymnosperm species from all major forest biomes. The hypothesis that curves from different tree species diverge between isohydric and anisohydric behaviours was tested.
3. Species-specific curves formed a continuum, rather than dichotomy between isohydric and anisohydric, as confirmed by distribution models. Alternatively, the water potential at 50% of the maximum g_s (Ψg_s50) was used to quantitatively compare between species. A major difference emerged among xylem anatomy classes whereby ring-porous species had higher absolute g_s at Ψ_l < −2 MPa than diffuse-porous and coniferous species. A positive, linear correlation was shown between Ψg_s50 and Ψ_l at 50% loss of xylem conductivity.
4. The results suggest that stomatal sensitivity to leaf water potential strongly relates to xylem characteristics. The use of Ψg_s50 offers a quantitative alternative to the current, yet biased, distinction between isohydric and anisohydric species.

See the text: Wiley Online Library