Telomere Length Variation in Model Bryophytes

Area of Science:

• Plant genomics
• Evolutionary biology
• Molecular genetics

Background:

• Telomeres protect chromosome ends in eukaryotes, but vary in length and sequence across lineages.
• Bryophytes (mosses, liverworts, hornworts) are ancient land plants crucial for understanding plant evolution and adaptation.
• These early diverging plants are increasingly used as models in genomics research.

Purpose of the Study:

• To measure and analyze telomere length variation in model bryophyte species.
• To investigate the extent of natural variation in telomere length across different ecotypes and isolates.
• To explore potential differences in telomere length related to sex in dioecious bryophytes.

Main Methods:

• Telomere length was measured in various ecotypes of *Physcomitrium patens*, *Marchantia polymorpha*, *Ceratodon purpureus*, and *Sphagnum* isolates.
• Comparative analysis of telomere length across different genotypes, ecotypes, and sexes.

Main Results:

• All analyzed moss and liverwort genotypes possess relatively short telomeres.
• Substantial natural variation in telomere length was observed across ecotypes and isolates.
• Telomere length differed between male and female strains in the dioecious liverwort *M. polymorpha* and moss *C. purpureus*.

Conclusions:

• Bryophytes display short telomeres with significant natural length variation.
• This variation in telomere length is a notable feature of these ancient land plants.
• Understanding telomere length variation in bryophytes can provide insights into their evolutionary adaptations to diverse ecological niches.