Peak performance: plants’ genetic strategies for surviving high-altitude habitats

Alpine habitats present extreme challenges, including low temperatures, high UV radiation, and limited oxygen levels, which demand unique adaptations from the plants that inhabit these regions. Despite their ecological importance, the genetic mechanisms behind these adaptations are not well understood. Studying these mechanisms is crucial because it can lead to insights into plant resilience and survival strategies under environmental stress. Due to these challenges, it is imperative to conduct in-depth research to uncover the genetic and physiological adaptations that enable plant survival in such harsh conditions.

Researchers from the Chinese Academy of Sciences and other institutions have published a study (DOI: 10.1093/hr/uhae077) on May 1, 2024, in Horticulture Research, that unveils the genomic adaptations of the alpine plant Triplostegia glandulifera. The study provides a comprehensive analysis of how this plant copes with the harsh conditions of high-elevation environments.

The study presents a detailed genome assembly of T. glandulifera and compares it with the lowland species Lonicera japonica. Researchers discovered a whole-genome duplication event in T. glanduliferaa, which increased the number of cold-related genes, enhancing the plant’s ability to withstand cold stress. Key genes, such as CBFs and LEAs, were found to be highly expressed in T. glandulifera, playing crucial roles in cold tolerance. Additionally, the study identified a convergent reduction in disease resistance genes among alpine plants, indicating an energy-saving strategy in environments with fewer pathogens. This reduction in immune-related genes reflects an adaptation to the alpine habitat, where conserving energy is vital for survival. Overall, the research provides valuable insights into the genetic basis of alpine adaptation, offering potential applications in improving plant resilience in extreme environments.

Dr. Zhi-Duan Chen, a leading scientist in plant genomics, remarked, “This research provides unprecedented insights into the genetic adaptations of alpine plants. Understanding these mechanisms is crucial for conserving these species and could inform agricultural practices in challenging environments.”

The insights gained from this study could significantly impact conservation strategies for alpine plants, which are particularly vulnerable to climate change. By identifying key genes involved in stress tolerance, researchers can develop new approaches to enhance the resilience of crops in extreme environments. Moreover, this knowledge may contribute to the cultivation and preservation of medicinal plants like T. glandulifera, ensuring their availability for future generations.

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References

DOI

10.1093/hr/uhae077

Original Source URL

https://doi.org/10.1093/hr/uhae077

Funding information

This work was supported by grants from the Science Fund for Creative Research Groups of the National Natural Science Foundation of China (No. 32221001), the National Natural Science Foundation of China (General Program) (No. 32070233), the National Key Research Development Program of China (No. 2023YFF0805800), and the Forestry Peak Discipline Construction Project of Fujian Agriculture and Forestry University (No. 72202200205).

About Horticulture Research

Horticulture Research is an open access journal of Nanjing Agricultural University and ranked number one in the Horticulture category of the Journal Citation Reports ™ from Clarivate, 2022. The journal is committed to publishing original research articles, reviews, perspectives, comments, correspondence articles and letters to the editor related to all major horticultural plants and disciplines, including biotechnology, breeding, cellular and molecular biology, evolution, genetics, inter-species interactions, physiology, and the origination and domestication of crops.