The potential link between gas diffusion and embolism spread in angiosperm xylem: Evidence from flow‐centrifuge experiments and modelling DOI Creative Commons
Luciano M. Silva, Luciano Pereira, Lucian Kaack

et al.

Plant Cell & Environment, Journal Year: 2024, Volume and Issue: 47(12), P. 4977 - 4991

Published: Aug. 9, 2024

Abstract Understanding xylem embolism formation is challenging due to dynamic changes and multiphase interactions in conduits. Here, we hypothesise that spread involves gas diffusion xylem, affected by time. We measured hydraulic conductivity (K h ) flow‐centrifuge experiments over 1 at a given pressure temperature for stem samples of three angiosperm species. Temporal K 5, 22, 35°C, various pressures were compared modelled concentration recently embolised vessel the centre centrifuge sample. logarithmic species‐specific. Maximum relative increases between 6% 40% happened 22°C low centrifugal speed (<3250 RPM), while maximum decreases 41% 61% occurred higher speeds. These reductions experimentally shown be associated with temporal increase samples, which was likely embolized vessels. Although mostly pressure‐driven, our experimental data indicate time, conduit characteristics, are involved their potential role diffusion. Gas diffusion, however, does not seem cover entire process spread.

Language: Английский

The potential link between gas diffusion and embolism spread in angiosperm xylem: Evidence from flow‐centrifuge experiments and modelling DOI Creative Commons
Luciano M. Silva, Luciano Pereira, Lucian Kaack

et al.

Plant Cell & Environment, Journal Year: 2024, Volume and Issue: 47(12), P. 4977 - 4991

Published: Aug. 9, 2024

Abstract Understanding xylem embolism formation is challenging due to dynamic changes and multiphase interactions in conduits. Here, we hypothesise that spread involves gas diffusion xylem, affected by time. We measured hydraulic conductivity (K h ) flow‐centrifuge experiments over 1 at a given pressure temperature for stem samples of three angiosperm species. Temporal K 5, 22, 35°C, various pressures were compared modelled concentration recently embolised vessel the centre centrifuge sample. logarithmic species‐specific. Maximum relative increases between 6% 40% happened 22°C low centrifugal speed (<3250 RPM), while maximum decreases 41% 61% occurred higher speeds. These reductions experimentally shown be associated with temporal increase samples, which was likely embolized vessels. Although mostly pressure‐driven, our experimental data indicate time, conduit characteristics, are involved their potential role diffusion. Gas diffusion, however, does not seem cover entire process spread.

Language: Английский

Citations

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