How Does Water Availability Affect the Allocation to Bark in a Mediterranean Conifer?

Martín-Sanz, Ruth C.; Martín, Roberto San; Poorter, Hendrik; Vázquez, Antonio; Climent, José

doi:10.3389/fpls.2019.00607

Cited by 14 publications

(2 citation statements)

References 92 publications

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“…Our analysis indicated that climatic factors of their native range have a strong influence on bark anatomical traits. Martıń-Sanz et al (2019) found that dry conditions were not conducive to bark biomass partitioning and thus led to thinner bark, which is generally consistent with the positive correlation between the precipitation of the wettest quarter (PREWQ) and phloem thickness in our study. The mean temperature of the driest quarter had a strong effect on parenchyma cell size, which increased significantly with increasing temperature.…”

Section: Drivers Of Variation In Bark Anatomical Traits Of Picea Speciessupporting

confidence: 91%

Climatic responses and variability in bark anatomical traits of 23 Picea species

et al. 2023

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In woody plants, bark is an important protective tissue which can participate in photosynthesis, manage water loss, and transport assimilates. Studying the bark anatomical traits can provide insight into plant environmental adaptation strategies. However, a systematic understanding of the variability in bark anatomical traits and their drivers is lacking in woody plants. In this study, the bark anatomical traits of 23 Picea species were determined in a common garden experiment. We analyzed interspecific differences and interpreted the patterns in bark anatomical traits in relation to phylogenetic relationships and climatic factors of each species according to its global distribution. The results showed that there were interspecific differences in bark anatomical traits of Picea species. Phloem thickness was positively correlated with parenchyma cell size, possibly related to the roles of parenchyma cells in the radial transport of assimilates. Sieve cell size was negatively correlated with the radial diameter of resin ducts, and differences in sieve cells were possibly related to the formation and expansion of resin ducts. There were no significant phylogenetic signals for any bark anatomical trait, except the tangential diameter of resin ducts. Phloem thickness and parenchyma cell size were affected by temperature-related factors of their native range, while sieve cell size was influenced by precipitation-related factors. Bark anatomical traits were not significantly different under wet and dry climates. This study makes an important contribution to our understanding of variability in bark anatomical traits among Picea species and their ecological adaptations.

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Section: Drivers Of Variation In Bark Anatomical Traits Of Picea Speciessupporting

confidence: 91%

Climatic responses and variability in bark anatomical traits of 23 Picea species

et al. 2023

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“…They concluded that inner bark properties were associated with the regulation of water status and photosynthetic capacity, and outer bark properties with defence against pathogen attack, mechanical support and fire resistance. Similarly, Martín-Sanz et al (2019) showed that Pinus halepensis trees growing at moister sites allocated more resources to the bark, whereas trees growing at drier sites allocated fewer resources to the bark, resulting in thinner bark. The supplement summer irrigation began in 2017, so no genetic adaptations are possible between the studied trees at our two contrasting plots, and thus, any possible differences in the bark characteristics of the control and irrigated trees would be caused by acclimation to the prevailing environmental conditions.…”

Section: Discussionmentioning

confidence: 98%

Bark Transpiration Rates Can Reach Needle Transpiration Rates Under Dry Conditions in a Semi-arid Forest

Lintunen

Preisler

et al. 2021

Front. Plant Sci.

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Drought can cause tree mortality through hydraulic failure and carbon starvation. To prevent excess water loss, plants typically close their stomata before massive embolism formation occurs. However, unregulated water loss through leaf cuticles and bark continues after stomatal closure. Here, we studied the diurnal and seasonal dynamics of bark transpiration and how it is affected by tree water availability. We measured continuously for six months water loss and CO2 efflux from branch segments and needle-bearing shoots in Pinus halepensis growing in a control and an irrigation plot in a semi-arid forest in Israel. Our aim was to find out how much passive bark transpiration is affected by tree water status in comparison with shoot transpiration and bark CO2 emission that involve active plant processes, and what is the role of bark transpiration in total tree water use during dry summer conditions. Maximum daily water loss rate per bark area was 0.03–0.14 mmol m−2 s−1, which was typically ~76% of the shoot transpiration rate (on leaf area basis) but could even surpass the shoot transpiration rate during the highest evaporative demand in the control plot. Irrigation did not affect bark transpiration rate. Bark transpiration was estimated to account for 64–78% of total water loss in drought-stressed trees, but only for 6–11% of the irrigated trees, due to differences in stomatal control between the treatments. Water uptake through bark was observed during most nights, but it was not high enough to replenish the lost water during the day. Unlike bark transpiration, branch CO2 efflux decreased during drought due to decreased metabolic activity. Our results demonstrate that although bark transpiration represents a small fraction of the total water loss through transpiration from foliage in non-stressed trees, it may have a large impact during drought.

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Tracking climate vulnerability across spatial distribution and functional traits in Magnolia gentryi in the Peruvian tropical montane cloud forest

Rodríguez‐Ramírez,

Arroyo,

Ames‐Martínez

et al. 2024

American J of Botany

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PremiseUnderstanding the responses of functional traits in tree species to climate variability is essential for predicting the future of tropical montane cloud forest (TMCF) tree species, especially in Andean montane environments where fog pockets act as moisture traps.MethodsWe studied the distribution of Magnolia gentryi, measured its spatial arrangement, identified local hotspots, and evaluated the extent to which climate‐related factors are associated with its distribution. We then analyzed the variation in 13 functional traits of M. gentryi and the relationship with climate.ResultsAndean TMCF climatic factors constrain M. gentryi spatial distribution with significant patches or gaps that are associated with high precipitation and mean minimum temperature. The functional traits of M. gentryi are limited by the Andean TMCF climatic factors, resulting in reduced within‐species variation in traits associated with water deficit.ConclusionsThe association between functional traits and climate oscillation is crucial for understanding the growth conditions of relict‐endemic species and is essential for conservation efforts. Forest trait diversity and species composition change because of fluctuations in hydraulic safety‐efficiency gradients.

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How Does Water Availability Affect the Allocation to Bark in a Mediterranean Conifer?

Cited by 14 publications

References 92 publications

Climatic responses and variability in bark anatomical traits of 23 Picea species

Climatic responses and variability in bark anatomical traits of 23 Picea species

Bark Transpiration Rates Can Reach Needle Transpiration Rates Under Dry Conditions in a Semi-arid Forest

Tracking climate vulnerability across spatial distribution and functional traits in Magnolia gentryi in the Peruvian tropical montane cloud forest

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