@article{fdi:010088062, title = {{T}hresholds for persistent leaf photochemical damage predict plant drought resilience in a tropical rainforest}, author = {{F}ortunel, {C}laire and {S}tahl, {C}. and {C}oste, {S}. and {Z}iegler, {C}. and {D}erroire, {G}. and {L}evionnois, {S}. and {M}arechaux, {I}. and {B}onal, {D}. and {H}erault, {B}. and {W}agner, {F}. {H}. and {S}ack, {L}. and {C}have, {J}. and {H}euret, {P}. and {J}ansen, {S}. and {J}ohn, {G}. and {S}coffoni, {C}. and {T}rueba, {S}. and {B}artlett, {M}. {K}.}, editor = {}, language = {{ENG}}, abstract = {{W}ater stress can cause declines in plant function that persist after rehydration. {R}ecent work has defined 'resilience' traits characterizing leaf resistance to persistent damage from drought, but whether these traits predict resilience in whole-plant function is unknown. {I}t is also unknown whether the coordination between resilience and 'resistance' - the ability to maintain function during drought - observed globally occurs within ecosystems.{F}or eight rainforest species, we dehydrated and subsequently rehydrated leaves, and measured water stress thresholds for declines in rehydration capacity and maximum quantum yield of photosystem {II} ({F}-v/{F}-m). {W}e tested correlations with embolism resistance and dry season water potentials (?({MD})), and calculated safety margins for damage (?({MD}) - thresholds) and tested correlations with drought resilience in sap flow and growth. {P}si thresholds for persistent declines in {F}-v/{F}-m, indicating resilience, were positively correlated with {P}si({MD}) and thresholds for leaf vein embolism. {S}afety margins for persistent declines in {F}-v/{F}-m, but not rehydration capacity, were positively correlated with drought resilience in sap flow.{C}orrelations between resistance and resilience suggest that species' differences in performance during drought are perpetuated after drought, potentially accelerating shifts in forest composition. {R}esilience to photochemical damage emerged as a promising functional trait to characterize whole-plant drought resilience.}, keywords = {drought ; embolism resistance ; hydraulics ; photochemistry ; recovery ; rehydration ; tropical ; {GUYANE} {FRANCAISE} ; {ZONE} {TROPICALE}}, booktitle = {}, journal = {{N}ew {P}hytologist}, volume = {239}, numero = {2}, pages = {576--591}, ISSN = {0028-646{X}}, year = {2023}, DOI = {10.1111/nph.18973}, URL = {https://www.documentation.ird.fr/hor/fdi:010088062}, }