Exploring the High Variability of Vegetative Desiccation Tolerance in Pteridophytes

Area of Science:

• Plant evolution
• Plant physiology
• Ecology

Background:

• Pteridophytes (lycophytes and ferns) bridge bryophytes and seed plants.
• They inhabit diverse environments, including extreme conditions.
• Many pteridophytes exhibit desiccation tolerance (DT), a trait crucial for survival.

Purpose of the Study:

• Review the incidence and diversity of desiccation-tolerant pteridophytes.
• Discuss the evolutionary origins of DT in vascular plants.
• Summarize adaptations and mechanisms of DT in pteridophytes and their potential for multiple abiotic stress tolerance.

Main Methods:

• Literature review of pteridophyte diversity and DT mechanisms.
• Analysis of anatomical and physiological adaptations.
• Synthesis of research on the evolution of DT.

Main Results:

• Pteridophytes display a wide range of DT strategies, intermediate between constitutive and inducible mechanisms.
• Anatomical diversity is significant among desiccation-tolerant species.
• Some pteridophytes possess tolerance to multiple abiotic stresses.

Conclusions:

• DT in pteridophytes offers insights into plant adaptation to extreme environments.
• Studying DT evolution and regulation is vital for understanding plant resilience.
• Knowledge of DT strategies can inform efforts to enhance crop abiotic stress tolerance.