Enhanced drought resistance in tomato via reduced auxin sensitivity: delayed dehydration and improved leaf resistance to embolism DOI Creative Commons
Moab T. Andrade, Amanda Á. Cardoso, Leonardo A. Oliveira

et al.

Physiologia Plantarum, Journal Year: 2024, Volume and Issue: 176(3)

Published: May 1, 2024

Abstract Auxins are master regulators of plant development and auxin perception mutants display smaller leaves, lower transpiration, narrower xylem vessels than their corresponding wild types. Here, we evaluated whether the leaf embolism resistance overall to drought altered in mutant diageotropica ( dgt ). Our assessments demonstrate that tomato exhibit considerably stems (‐24%), petioles (‐43%), midribs (‐34%) type. Alongside vessels, exhibited greater cell wall thickness‐to‐conduit diameter The water potential at 50% cumulative (P 50 ) type was ‐1.39 ‐1.14 MPa, respectively. Plants also higher stomatal safety margin (water difference between closure P ), needed a longer time reach dry‐down experiment, showed faster recovery gas exchange upon rehydration impaired signaling resulted canopy area conductance, which likely contributed delaying for plants hydraulic damage during drought. These findings clear association structural physiological changes improved against drought‐induced dysfunction mutant.

Language: Английский

Gradients in embolism resistance within stems driven by secondary growth in herbs DOI Creative Commons
Eduardo J. Haverroth, Ian M. Rimer, Leonardo A. Oliveira

et al.

Plant Cell & Environment, Journal Year: 2024, Volume and Issue: 47(8), P. 2986 - 2998

Published: April 21, 2024

Abstract The stems of some herbaceous species can undergo basal secondary growth, leading to a continuum in the degree woodiness along stem. Whether formation growth stem base results differences embolism resistance between and upper portions is unknown. We assessed leaves simultaneously within same individuals two divergent that mature bases. were Solanum lycopersicum (tomato) Senecio minimus (fireweed). Basal plants both displayed advanced greater than This also resulted significant vulnerability segmentation species. Greater woodier was found alongside decreases pith‐to‐xylem ratio, increases proportion xylem, lignin content. show there be considerable variation across herbs this linked present. A gradient could an adaptation ensure reproduction or resprouting during episodes drought late lifecycle.

Language: Английский

Citations

4
Enhanced drought resistance in tomato via reduced auxin sensitivity: delayed dehydration and improved leaf resistance to embolism DOI Creative Commons
Moab T. Andrade, Amanda Á. Cardoso, Leonardo A. Oliveira

et al.

Physiologia Plantarum, Journal Year: 2024, Volume and Issue: 176(3)

Published: May 1, 2024

Abstract Auxins are master regulators of plant development and auxin perception mutants display smaller leaves, lower transpiration, narrower xylem vessels than their corresponding wild types. Here, we evaluated whether the leaf embolism resistance overall to drought altered in mutant diageotropica ( dgt ). Our assessments demonstrate that tomato exhibit considerably stems (‐24%), petioles (‐43%), midribs (‐34%) type. Alongside vessels, exhibited greater cell wall thickness‐to‐conduit diameter The water potential at 50% cumulative (P 50 ) type was ‐1.39 ‐1.14 MPa, respectively. Plants also higher stomatal safety margin (water difference between closure P ), needed a longer time reach dry‐down experiment, showed faster recovery gas exchange upon rehydration impaired signaling resulted canopy area conductance, which likely contributed delaying for plants hydraulic damage during drought. These findings clear association structural physiological changes improved against drought‐induced dysfunction mutant.

Language: Английский

Citations

1