Patterns, timing, and environmental drivers of secondary growth in two physiologically distinct Mediterranean alpine shrub species DOI Creative Commons
Eike Corina Albrecht, Svenja Dobbert, Roland Pape

et al.

Environmental Research Ecology, Journal Year: 2023, Volume and Issue: 2(4), P. 045002 - 045002

Published: Oct. 4, 2023

Abstract Alpine plants are particularly sensitive to climate change, and in the Mediterranean, less frequent winter cold prolonged summer drought expected shift growth patterns of species, altering their range strategies cope with these dual climatic stressors. However, adaptive for frost impact on performance species poorly explored, critical timescales relevant insufficiently reflected a focus limited set environmental drivers. Here, we explored processes two physiologically distinct Mediterranean alpine shrub species: Cytisus galianoi (green-stemmed species) Astragalus granatensis (dimorphic species). By measuring daily stem diameter changes 26 specimens over six consecutive years (2015–2020) using dendrometers, as well corresponding soil temperature moisture conditions, identified bimodal annual (i.e. phases growth), water-related timing growth, drought- frost-related constraints. implementing correlation analyses, linear mixed effects models, partial least-squares regression, found pregrowth drivers be highly both suggesting temporal decoupling resource acquisition. underlying mechanisms were contrasting. While spring C. was promoted by autumn A. conditions. Thus, acquisition is likely optimized when traits allow physiological activity at high gain low costs, i.e. reduce consumption drought. This during frost-tolerant green-stemmed drought-avoidant dimorphic leading species-specific time windows growth. Understanding contributes answering overarching question how woody grow helps understanding adaptability future variability, environments, where plant evolutionally adapted physical peculiarities reach low-temperature limit.

Language: Английский

Response mechanism of water status and photosynthetic characteristics of Cotoneaster multiflorus under drought stress and rehydrated conditions DOI Creative Commons

Qiuliang Huang,

Miaomiao Zhang,

Changshun Li

et al.

Frontiers in Plant Science, Journal Year: 2025, Volume and Issue: 15

Published: Jan. 14, 2025

Introduction Plant physiology response and adaptation to drought stress has become a hotspot in plant ecology evolution. Cotoneaster multiflorus possesses high ecological, ornamental economic benefits. It large root system tolerance cold, poor soil. Therefore, C. is considered as one of the most important tree species for ecological restoration arid semi-arid areas. However, little known about physiological mechanisms, molecular mechanisms strategies how responds stress. exploring adaptive its growth regions. Methods We investigated coupling water status, photosynthetic properties chloroplast fluorescence parameters rehydrated after drought, especially importance nocturnal sap flow refilling maintain own balance In addition, we studied transcriptome factors, also discussed . Results adapted by series structural such promoting closing stomata, increasing flow. When undergoing severe stress, activities photosynthesis, chlorophyll other have rapidly resumed. This showed had strong drought. characteristics, were highly coupled. Nocturnal very Finally, will strengthen defense mechanism gene regulation various metabolisms, stomatal closure, reducing transpiration loss, vigorously regulating balance. responded avoiding or deficit organs tissues. shrub drought-tolerant plant. Discussion explored identified types

Language: Английский

Citations

1
Exploring the resilience of global vegetation ecosystem: Nonlinearity, driving forces, and management DOI

Xuan Lv,

Guo Chen,

Qiang Wang

et al.

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 377, P. 124634 - 124634

Published: Feb. 22, 2025

Language: Английский

Citations

0
Complex environmental control of growth in a dominant Mediterranean‐alpine shrub species DOI Creative Commons
Eike Corina Albrecht, Svenja Dobbert, Roland Pape

et al.

Journal of Ecology, Journal Year: 2024, Volume and Issue: 112(7), P. 1516 - 1532

Published: May 3, 2024

Abstract Mediterranean‐alpine plants are exposed to harsh conditions, forcing them perform with well‐adapted physiological strategies withstand the dual stressors that arise from winter cold and summer drought. Such growth not yet fully understood, although they gain importance regard resilience of species in face ongoing climate variability. Here, we aimed at understanding shrub a widespread species, Cytisus galianoi Talavera & Gibbs. Using long‐term time series stem diameter change obtained dendrometer measurements across species´ range, were able characterise its spatiotemporal plasticity. Furthermore, separating water‐related fluctuations irreversible increment allowed us disentangle seasonal patterns. fine‐scale on‐site environmental then identify micro‐ecological drivers controlling processes by applying correlation analysis partial least squares regressions. We show adaptation spatial heterogeneity range for first time. Our findings highlight combination bimodality overall high plasticity likely allows cover wide geographical alpine areas over weather conditions. control bimodal C. , pre‐growth control, leading pronounced carry‐over effects. These lead major advantage resisting adverse conditions adapting changing Synthesis : Overall, our improve ecological niche preceding photosynthetic activity helps even under unfavourable during active phase, challenging general assumption on coupling specific seasons suggesting is capable future

Language: Английский

Citations

3
Stem Growth and Dehydration Responses of Mediterranean Tree Species to Atmospheric and Soil Drought DOI Creative Commons
Roberto L. Salomón, J. Julio Camarero

Plant Cell & Environment, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 3, 2024

ABSTRACT Stem growth responses to soil and atmospheric drought are critical forecasting the tree carbon sink strength. Yet, of drought‐prone forests remain uncertain despite global aridification trends. diameter variations at an hourly resolution were monitored in five Mediterranean species from a mesic xeric site for 6 12 years. dehydration (REW) (VPD) explored different timescales. Annually, was determined by number growing days hours. Seasonally, bimodal (autumn ≈ 8%–18% annual growth), varying among sites across hydrometeorological space, while consistently responded REW. Sub‐daily, substantial occurred during daytime, with nighttime‐to‐daytime ratios ranging between 1.2 3.5 ( Arbutus unedo Quercus faginea < ilex Pinus halepensis site, Juniperus thurifera P. site). Overall, time windows favourable limited (rather than atmospheric) drought, modulating seasonal species, stems maintained non‐negligible daytime. These patterns contrast observations wetter or cooler biomes, demonstrating plasticity more arid climate conditions.

Language: Английский

Citations

0
Patterns, timing, and environmental drivers of secondary growth in two physiologically distinct Mediterranean alpine shrub species DOI Creative Commons
Eike Corina Albrecht, Svenja Dobbert, Roland Pape

et al.

Environmental Research Ecology, Journal Year: 2023, Volume and Issue: 2(4), P. 045002 - 045002

Published: Oct. 4, 2023

Abstract Alpine plants are particularly sensitive to climate change, and in the Mediterranean, less frequent winter cold prolonged summer drought expected shift growth patterns of species, altering their range strategies cope with these dual climatic stressors. However, adaptive for frost impact on performance species poorly explored, critical timescales relevant insufficiently reflected a focus limited set environmental drivers. Here, we explored processes two physiologically distinct Mediterranean alpine shrub species: Cytisus galianoi (green-stemmed species) Astragalus granatensis (dimorphic species). By measuring daily stem diameter changes 26 specimens over six consecutive years (2015–2020) using dendrometers, as well corresponding soil temperature moisture conditions, identified bimodal annual (i.e. phases growth), water-related timing growth, drought- frost-related constraints. implementing correlation analyses, linear mixed effects models, partial least-squares regression, found pregrowth drivers be highly both suggesting temporal decoupling resource acquisition. underlying mechanisms were contrasting. While spring C. was promoted by autumn A. conditions. Thus, acquisition is likely optimized when traits allow physiological activity at high gain low costs, i.e. reduce consumption drought. This during frost-tolerant green-stemmed drought-avoidant dimorphic leading species-specific time windows growth. Understanding contributes answering overarching question how woody grow helps understanding adaptability future variability, environments, where plant evolutionally adapted physical peculiarities reach low-temperature limit.

Language: Английский

Citations

1