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Rethinking drought memory in crops: A call for improved experimental design.

Gustavo J Vannay1, María E Otegui2, Matías Capella1

  • 1Instituto de Agrobiotecnología del Litoral, CONICET, Universidad Nacional del Litoral, FBCB, Colectora Ruta Nacional 168 km 0, Santa Fe 3000, Argentina.

Plant Science : an International Journal of Experimental Plant Biology
|December 7, 2025
PubMed
Summary
This summary is machine-generated.

Plants may remember drought stress, but evidence is limited. Current studies often have flaws, comparing single vs. double stress without accounting for plant size differences, questioning the real benefits of drought memory.

Keywords:
Crop drought memoryCrop stress memoryDrought memoryDrought primed plantsStress memory

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Area of Science:

  • Plant Physiology
  • Stress Biology
  • Crop Science

Background:

  • Stress memory in plants is a growing area of research with potential for crop improvement.
  • Intragenerational stress memory, particularly drought memory, lacks substantial empirical support and clear understanding.
  • Existing research raises questions about the existence, duration, and benefits of plant stress memory.

Purpose of the Study:

  • To critically review the current understanding of drought memory in plants.
  • To identify and address methodological deficiencies in existing studies on plant stress memory.
  • To propose improved experimental designs for future research on drought memory.

Main Methods:

  • Critical analysis of existing literature on plant drought memory.
  • Identification of confounding variables in common experimental designs.
  • Formulation of recommendations for more rigorous experimental protocols.

Main Results:

  • The existence, duration, and benefits of intragenerational drought memory are not well-established.
  • A significant methodological flaw exists in many studies, failing to control for reduced plant size and water consumption in primed plants.
  • Current evidence is insufficient to confirm adaptive benefits of drought memory.

Conclusions:

  • More rigorous experimental designs are needed to validate plant stress memory.
  • Future research should employ revised methods to accurately assess the adaptive benefits and endurance of drought memory.
  • Clarifying drought memory is crucial for advancing crop improvement strategies.