Angiosperms at the edge: Extremity, diversity, and phylogeny

Area of Science:

• Plant evolutionary biology
• Ecology
• Genomics

Background:

• Flowering plants exhibit remarkable adaptability to extreme cold and dry biomes, surpassing other land plants.
• Existing research highlights phylogenetic distribution and evolutionary mechanisms but lacks integration with physiological traits, morphology, and genomic diversity.

Purpose of the Study:

• To synthesize evolutionary perspectives with plant physiological traits, morphology, and genomic diversity.
• To understand the evolutionary parallelism and diversification of flowering plants in extreme environments.
• To provide a framework for future research on plant adaptation.

Main Methods:

• Summarizing key physiological and structural traits for cold and drought stress response.
• Outlining the phylogenetic distribution of these adaptations.
• Describing the association of these changes with diversification events over the past 15 million years.

Main Results:

• Identified diverse physiological and structural traits enabling survival in cold and dry conditions.
• Documented the phylogenetic distribution of these adaptations across various plant lineages.
• Observed recurring associations between these adaptations and rapid diversification events.

Conclusions:

• Flowering plants display a wide array of adaptive solutions for extreme environments.
• A broad correlation exists between cold and dry adaptations, suggesting potential deep common origins in some lineages.