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. 2024 May-Jun;176(3):e14326.
doi: 10.1111/ppl.14326.

Plasticity and implications of water-use traits in contrasting tropical tree species under climate change

Maria Wittemann  1 , Myriam Mujawamariya  1   2 , Bonaventure Ntirugulirwa  1   2   3   4 , Felicien K Uwizeye  5 , Etienne Zibera  5 , Olivier Jean Leonce Manzi  1   6 , Donat Nsabimana  5 , Göran Wallin  1 , Johan Uddling  1
Affiliations

Plasticity and implications of water-use traits in contrasting tropical tree species under climate change

Maria Wittemann et al. Physiol Plant. 2024 May-Jun.

Abstract

Plants face a trade-off between hydraulic safety and growth, leading to a range of water-use strategies in different species. However, little is known about such strategies in tropical trees and whether different water-use traits can acclimate to warming. We studied five water-use traits in 20 tropical tree species grown at three different altitudes in Rwanda (RwandaTREE): stomatal conductance (gs), leaf minimum conductance (gmin), plant hydraulic conductance (Kplant), leaf osmotic potential (ψo) and net defoliation during drought. We also explored the links between these traits and growth and mortality data. Late successional (LS) species had low Kplant, gs and gmin and, thus, low water loss, while low ψo helped improve leaf water status during drought. Early successional (ES) species, on the contrary, used more water during both moist and dry conditions and exhibited pronounced drought defoliation. The ES strategy was associated with lower mortality and more pronounced growth enhancement at the warmer sites compared to LS species. While Kplant and gmin showed downward acclimation in warmer climates, ψo did not acclimate and gs measured at prevailing temperature did not change. Due to distinctly different water use strategies between successional groups, ES species may be better equipped for a warmer climate as long as defoliation can bridge drought periods.

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References

REFERENCES

    1. Adams HD, Zeppel MJB, Anderegg WRL, Hartmann H, Landhäusser SM, Tissue DT, Huxman TE, Hudson PJ, Franz TE, Allen CD et al. 2017. A multi‐species synthesis of physiological mechanisms in drought‐induced tree mortality. Nature Ecology and Evolution 1: 1285–1291.
    1. Aleixo I, Norris D, Hemerik L, Barbosa A, Prata E, Costa F, Poorter L. 2019. Amazonian rainforest tree mortality driven by climate and functional traits. Nature Climate Change 9: 384–388.
    1. Anderegg WRL, Klein T, Bartlett M, Jansen S. 2016. Meta‐analysis reveals that hydraulic traits explain cross‐species patterns of drought‐induced tree mortality across the globe. Proceedings of the National Academy of Sciences of the United States of America 113: 5024–5029.
    1. Anderegg WRL. 2015. Spatial and temporal variation in plant hydraulic traits and their relevance for climate change impacts on vegetation. New Phytologist 205: 1008–1014.
    1. Bartlett MK, Klein T, Jansen S, Sack L. 2016. The correlations and sequence of plant stomatal, hydraulic, and wilting responses to drought. Proceedings of the National Academy of Sciences of the United States of America 113: 13098–13103.

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