Unearthing belowground bud banks in fire-prone ecosystems

Area of Science:

• Plant Biology
• Ecology
• Evolutionary Biology

Background:

• Belowground bud banks are vital for plant survival, especially in fire-prone environments.
• Research on belowground bud diversity and terminology (lignotuber, xylopodium, sobole) is inconsistent.
• Soil insulation protects buds from fire, conferring fitness advantages.

Purpose of the Study:

• To highlight the under-researched diversity of belowground bud banks.
• To categorize the various locations and evolutionary origins of bud-bearing structures.
• To emphasize the importance of belowground buds for understanding plant adaptation to recurrent disturbances.

Main Methods:

• Literature review and synthesis of existing research on belowground bud structures.
• Classification of bud-bearing organs based on location, morphology, and evolutionary history.
• Analysis of the ecological context, particularly fire-prone ecosystems.

Main Results:

• Identified at least six distinct locations for belowground bud storage: roots, root crown, rhizomes, woody burls, fleshy swellings, and belowground caudexes.
• Categorized these structures into three evolutionary groups based on origin and distribution.
• Demonstrated a significant diversity of bud-bearing structures, particularly in fire-prone ecosystems.

Conclusions:

• Recognizing the diversity of belowground bud banks is fundamental for understanding plant evolutionary strategies.
• Belowground buds play a critical role in plant resilience and adaptation to environmental disturbances like fire.
• Standardizing terminology for belowground bud structures is needed for clearer scientific communication.