Journal Article

FZJ-2025-02303

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png How does the leaf heat sensitivity relate to the species' geographical distribution range in the Brazilian savanna?

de Sousa Oliveira, T. C. (Corresponding author)FZJ* ; Oliveira, V. D. ; Gallo, L. B. ; Kruijt, B. ; Veenendaal, E. ; Domingues, T. F.

2025
Springer Heidelberg

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Please use a persistent id in citations: doi:10.1007/s40626-025-00364-5  doi:10.34734/FZJ-2025-02303

Abstract: Global warming poses a significant impact on plant species in the Cerrado, the largest savanna in the world. However, there is still a gap in understanding how species distribution patterns are associated with their thermal sensitivity. One approach to address this is quantifying species´ specific responses through leaf traits related to heat stress. Therefore, we determined the temperature that caused a 50% reduction (T50) in the light-acclimated quantum efficiency of PSII (Fv′/Fm′) and the thermal safety margin (TSM) (T50—maximum leaf temperature), together with Leaf Area (LA) and Leaf Mass Area (LMA) in 12 tree species from two climatic contrasting regions within the Cerrado. We compared the traits between widespread species (co-occurring in both sites) and species restricted to each region, and we explored the relationships between T50 and TSM with LA and LMA. As a result, we found that T50 and TSM values were similar across species, regardless of study region or species distribution range. Additionally, we observed that study species had lower TSM, which suggests that these species might be likely to approach high-temperature thresholds. Furthermore, the study species exhibited general relationships between LA and LMA with T50, indicating that leaf traits mainly determine the thermal properties of Cerrado tree species.

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Contributing Institute(s):

1. Pflanzenwissenschaften (IBG-2)

Research Program(s):

1. 2171 - Biological and environmental resources for sustainable use (POF4-217) (POF4-217)

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Database coverage:
; ; ; BIOSIS Previews ; Biological Abstracts ; Clarivate Analytics Master Journal List ; Current Contents - Agriculture, Biology and Environmental Sciences ; DEAL Springer ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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