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Home NEWS Science News Biology

Scientists unravel transition of survival strategies in grape family

by
July 16, 2024
in Biology
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In a study published in Nature Plants, scientists have identified Eocene, Oligocene, and Miocene boundaries as turning points for the transition of survival strategies in the grape family (Vitaceae). 

Biogeographic history and global dispersal routes of the grape family

Credit: IBCAS

In a study published in Nature Plants, scientists have identified Eocene, Oligocene, and Miocene boundaries as turning points for the transition of survival strategies in the grape family (Vitaceae). 

The “move” strategy dominated during the Eocene and Miocene Climatic Optimums, while “evolve” began to prevail after the Miocene, correlating with global cooling and the emergence of new habitats. 

Understanding the origin and dynamics of biodiversity is a fundamental question in the context of global climate change. Faced with environmental fluctuations, plants can either “move” to seek their suitable habitats elsewhere or “evolve” to adapt to the changed environment. Although the transition between “move” and “evolve” has profound implications for the survival and adaptation of organisms, it remains hotly debated whether alternative strategies may dominate under different environmental conditions.

The globally distributed grape family has occupied a wide variety of contrasting niches, including rainforests, savannas, limestone outcrops and even deserts, making it an excellent model to study the transitions of plant survival strategies on a global scale.

Prof. CHEN Zhiduan’s research team from the Institute of Botany of the Chinese Academy of Sciences (IBCAS) and their international collaborators investigated the transition between “move” and “evolve” strategies, and demonstrated their adaptive significance involving niche opportunity and trait innovation throughout the evolutionary history of Vitaceae.

The researchers constructed a robust phylogeny of Vitaceae based on a worldwide sampling of 495 species from 17 genera, covering ~52% of Vitaceae species. By integrating diversification analyses, ancestral distributions, niche and trait reconstructions, and palaeobotanic data, they inferred the biogeographic diversification patterns and adaptive evolution of Vitaceae under climatic changes.

The grape family probably originated in Asia in the late Cretaceous (~72.43 million years ago (Ma)) and spatially diversified to all major continents in the Paleogene. Four genera of Vitaceae (Ampelocissus, Cyphostemma, Vitis, and Tetrastigma) have experienced a significant increase in diversification rate since the Oligocene, coinciding with their niche shifts and the emergence of adaptive traits.

The researchers further identified the “move” strategy as dominant during the Eocene and Miocene, coinciding with the high global temperatures of both periods, while “evolve” has been the dominant strategy since the last glacial period at 3.3 Ma, when several new habitats emerged in both hemispheres. 

This study highlights the importance of niche shifts in recent timeframes and suggests that hypotheses based on niche conservatism should be used with caution as an established assumption or be explicitly tested against comparable alternative hypotheses.

The results of this study advance our understanding of the origins and maintenance of biodiversity and provide insights into how plants may respond to a future changing world.

This work was supported by the National Natural Science Foundation of China, the National Key Research Development Program of China, and the Youth Innovation Promotion Association of CAS, etc.



Journal

Nature Plants

DOI

10.1038/s41477-024-01726-8

Method of Research

Experimental study

Subject of Research

Not applicable

Article Title

Transition of survival strategies under global climate shifts in the grape family

Article Publication Date

15-Jul-2024

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