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Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
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Abscisic Acid Enhances Ex Vitro Acclimatization Performance in Hop (Humulus lupulus L.).

Luciana Di Sario1,2, David Navarro-Payá3, María F Zubillaga1,2

  • 1Sede Atlántica, Universidad Nacional de Río Negro (UNRN), Viedma CP8500, Río Negro, Argentina.

International Journal of Molecular Sciences
|July 29, 2025
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Summary
This summary is machine-generated.

Hop plants

Keywords:
PYRABACTIN RESISTANCE 1 LIKE ABA (PYR/PYL) gene familyabiotic stressabscisic acid (ABA) perception and signalingin vitro propagationrustication

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Area of Science:

  • Plant science
  • Genomics
  • Agricultural biotechnology

Background:

  • Hop (Humulus lupulus L.) is crucial for brewing and medicine.
  • Climate change threatens hop cultivation due to its sensitivity.
  • Abscisic acid (ABA) signaling is vital for plant stress response but poorly understood in hop.

Purpose of the Study:

  • To characterize ABA receptor components in hop.
  • To investigate the role of ABA signaling in hop stress tolerance.
  • To explore ABA's potential for improving hop cultivation.

Main Methods:

  • Identified eight hop ABA receptor (HlPYL) genes using genomic resources.
  • Performed phylogenetic, gene structure, and expression analyses.
  • Assessed the physiological effects of exogenous ABA on ex vitro acclimatizing hop plants.

Main Results:

  • Eight functional HlPYLs were identified, classified into three subfamilies.
  • HlPYL1-like and HlPYL8-like subfamilies are key for ABA perception.
  • ABA application improved hop acclimatization, reduced stress, and enhanced stomatal closure.

Conclusions:

  • This study provides the first comprehensive characterization of hop ABA receptors.
  • ABA signaling is a promising target for enhancing hop stress resilience.
  • ABA application can improve ex vitro acclimatization and plant performance.