External supporting research Plant seasonality & cold adaptation EXT-S13

Plant Adaptation to Seasonal Cold & Winter Freezing

A peer-reviewed plant science review examining how flowering plants and other plant groups evolved adaptations to seasonal cold, including freezing tolerance, cold acclimation, dormancy and vernalization. The authors describe genetic and physiological pathways that help plants survive winter conditions.

Original study title

Adaptation to seasonality and the winter freeze

Plant seasonality Cold acclimation Freezing tolerance Plant physiology Plant genetics Vernalization Plant dormancy Climate adaptation

Study at a glance

Year 2013

Study type Narrative review and comparative evolutionary synthesis

Publication Peer-reviewed review article

EquiNectar tested? No

Peer reviewed No / not specified

Open access Yes

Relationship External supporting research

Research question

What did the researchers want to understand?

How have plants evolved physiological and genetic adaptations to seasonal cold, and to what extent do cold acclimation, freezing tolerance, dormancy and vernalization share ancestral regulatory pathways?

Researchers

Study authors

Jill C. Preston

University of Vermont

Simen R. Sandve

Norwegian University of Life Sciences

Research organizations

Research institutions

Norwegian University of Life Sciences

University
Norway

University of Vermont

University
United States

Methodology

How the study was conducted

Study design

Narrative scientific review integrating plant physiology, molecular genetics, developmental biology and comparative evolutionary research.

The authors examined previously published studies across different plant lineages to investigate the evolution of adaptations to seasonal cold.

The review considered physiological traits, genetic regulatory pathways and phylogenetic evidence.

No new plants were recruited, no original intervention was conducted and no independent experimental dataset was generated.

What was measured

No new experimental measurements were reported.

The authors reviewed previously published research on plant physiological responses to seasonal cold and the genetic mechanisms underlying those responses.

The review examined evidence concerning cold acclimation, freezing tolerance, dormancy, vernalization, gene regulation and evolutionary relationships among plant groups.

It also considered how similar genetic pathways may have been recruited independently during the evolution of cold-adaptive traits.

Study findings

Key results

• The review identifies cold acclimation, freezing tolerance, endodormancy and vernalization responsiveness as important adaptations to seasonal cold.

• Evidence from plant phylogenetics suggests that cold-adaptive traits evolved independently in multiple plant lineages.

• Cold acclimation involves coordinated physiological changes that protect cells from freezing injury.

• Protective responses can involve membrane lipids, carbohydrates, proteins and changes in photosynthetic regulation.

• Different plant groups may recruit related genetic pathways to regulate cold tolerance and seasonal development.

• Genetic regulators involved in cold acclimation and flowering may interact, potentially coordinating responses to seasonal conditions.

• The evolution of vernalization responsiveness has involved different genetic mechanisms in different plant lineages.

• The authors identify substantial gaps in understanding how quickly cold-adaptive traits can evolve in natural plant populations.

• The review does not report original measurements of pasture nutritional composition or outcomes in horses.

Interpretation

What do the findings mean?

The review concludes that plant adaptations to seasonal cold have evolved independently multiple times across different evolutionary lineages.

Despite these independent origins, some adaptations appear to involve related or previously existing genetic pathways.

Cold acclimation, freezing tolerance, endodormancy and vernalization responsiveness are distinct biological processes, although they may share regulatory mechanisms.

Cold acclimation helps plants tolerate low temperatures through changes in cellular protection, membrane stability and gene expression.

Endodormancy regulates seasonal suspension of growth, while vernalization enables certain plants to respond to prolonged cold by becoming competent to flower.

The authors suggest that the repeated recruitment of related genetic pathways may help explain how plants evolved the capacity to survive seasonal freezing environments.

The article contributes to understanding plant evolutionary biology and environmental adaptation, rather than demonstrating any specific effect on horse nutrition or digestive health.

In practice

Why this research matters

Temperate plants respond to seasonal temperature changes through coordinated physiological and developmental processes.

These responses include cold acclimation, increased freezing tolerance, dormancy and changes in the timing of flowering and growth.

The review explains that cold acclimation can involve changes in membrane composition, protective proteins, carbohydrates and gene expression.

This is useful background for understanding why plant physiology varies with environmental conditions.

However, the paper does not provide practical grazing recommendations for horse owners.

It does not identify safe or unsafe grazing temperatures, quantify pasture non-structural carbohydrates or establish a relationship between winter conditions and equine laminitis.

Decisions about grazing management require evidence specifically examining pasture composition, horse metabolic status and equine health outcomes.

Research transparency

Study limitations

This article is a narrative review rather than an original experimental study.

The authors synthesize research from multiple plant groups, including model species, cereal crops, grasses and woody plants.

Many of the molecular mechanisms discussed were investigated in particular species, and their functions cannot automatically be generalized across all plants.

The review was published in 2013, and subsequent research may have expanded understanding of the genetic pathways involved in cold adaptation.

The article does not present a systematic review protocol, meta-analysis or pooled quantitative estimates.

The authors identify substantial gaps in understanding how cold-adaptive traits evolve across different plant lineages.

The review does not directly investigate pasture grass nutritional composition, equine grazing, forage fructan concentrations, insulin dysregulation, laminitis or gastrointestinal disease.

Its findings should therefore not be extrapolated into horse feeding recommendations without additional equine-specific and forage-specific evidence.

EquiNectar context

How this research relates to EquiNectar

This research did not test EquiNectar and has no direct experimental relationship to equine digestive health.

Its possible relevance is limited to understanding how plants respond to seasonal environmental conditions.

The review describes how exposure to low temperatures can activate physiological and genetic processes involved in freezing tolerance, dormancy and seasonal development.

Some cold-acclimation mechanisms involve changes in carbohydrates, membrane lipids and other protective compounds within plant tissues.

These observations provide general background on plant responses to seasonal temperature changes.

However, the review does not measure sugar or fructan concentrations in horse pastures, does not evaluate grazing risk and does not investigate the effects of forage composition on equine metabolism or gastrointestinal health.

It therefore cannot be used as evidence that particular weather conditions cause dangerous pasture sugar concentrations or that EquiNectar modifies the effects of seasonal pasture changes.

Tharos / EquiNectar involvement

None. This review was conducted independently of Tharos Ltd and EquiNectar. It concerns plant evolutionary biology and does not evaluate horses, equine diets, gastrointestinal health or EquiNectar.

EquiNectar evaluated No

Transparency

Funding & competing interests

Funding statement

The authors acknowledged funding from a United States Department of Agriculture Hatch grant awarded to Jill C. Preston. No grant number was specified in the article.

Competing interests

The authors declared no commercial or financial relationships that could be construed as a potential conflict of interest.

Source record

Publication details

Journal

Frontiers in Plant Science

Publisher

Frontiers Media SA

Year

2013

Volume

Pages / article

167

DOI

10.3389/fpls.2013.00167

PMID

23761798

Species

Plants, including temperate grasses, flowering plants and trees

License

CC BY

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Recommended citation

Preston JC, Sandve SR. Adaptation to seasonality and the winter freeze. Frontiers in Plant Science. 2013;4:167. doi:10.3389/fpls.2013.00167.