Transposable element contributions to plant gene and genome evolution

Area of Science:

• Plant Biology
• Genetics
• Evolutionary Biology

Background:

• Transposable elements (TEs), or mobile DNA sequences, are key drivers of genome evolution in plants.
• TEs were first identified in plants due to their substantial effects on genome structure and gene function.
• The presence and activity of TEs vary greatly across plant species, even closely related ones.

Purpose of the Study:

• To highlight the significant role of transposable elements in shaping plant genomes.
• To emphasize the necessity of understanding TEs for plant gene and genome evolution research.

Main Methods:

• This study is a review and synthesis of existing knowledge on transposable elements in plants.
• Analysis of scientific literature focusing on the impact of TEs on plant genomes.

Main Results:

• TEs can constitute the majority of the nuclear genome in some large-genome plants.
• TEs drive genome rearrangement through transposition, insertion, excision, chromosome breakage, and ectopic recombination.
• TE activity is linked to gene assembly, amplification, and the generation of reproductive incompatibility, potentially driving speciation.

Conclusions:

• Comprehending the contributions of transposable elements is essential for understanding plant gene and genome evolution.
• TEs play a critical role in generating genomic novelty and evolutionary change in plants.
• The variable impact of TEs underscores their dynamic influence on plant lineage diversification.