Abstract
The gametophyte of moss exhibits a simple body plan, yet its growth is regulated by complex developmental phenomena similar to angiosperms. Because moss can be easily maintained under laboratory conditions, amenable for gene targeting and the availability of genome sequence, P. patens has become an attractive model system for studying evolutionary traits. Until date, there has been no Agrobacterium-mediated Tnt1 mutagenesis protocol for haploid protonemal filaments of moss. Hence, we attempted to use the intact tobacco Tnt1 retrotransposon as a mutagen for P. patens. Bioinformatic analysis of initiator methionyl-tRNA (Met-tRNAi), a critical host factor for Tnt1 transposition process, suggested that it can be explored as a mutagen for bryophytes. Using protonemal filaments and Agrobacterium-mediated transformation, 75 Tnt1 mutants have been generated and cryopreserved. SSAP analysis and TAIL-PCR revealed that Tnt1 is functional in P. patens and has a high-preference for gene and GC-rich regions. In addition, LTR::GUS lines exhibited a basal but tissue-specific inducible expression pattern. Forward genetic screen resulted in 5 novel phenotypes related to hormonal and gravity response, phyllid, and gamete development. SSAP analysis suggests that the Tnt1 insertion pattern is stable under normal growth conditions and the high-frequency phenotypic deviations are possibly due to the combination of haploid explant (protonema) and the choice of mutagen (Tnt1). We demonstrate that Agrobacterium-mediated Tnt1 insertional mutagenesis could generate stable P. patens mutant populations for future forward genetic studies.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
