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Isolation and characterization of a spore development mutant in Pyropia yezoensis (Rhodophyta) induced via
Hikari Izumi1, Yuji Nakai1, Toshiki Uji2
1Section of Food Sciences, Institute of Regional Innovation, Hirosaki University, Aomori, Aomori, Japan.
Journal of Phycology
|May 5, 2025
Summary
A Pyropia yezoensis mutant shows defective spore development, failing to release and germinate properly. This highlights the role of homeodomain proteins in seaweed reproduction and cultivation.
Area of Science:
- Marine Biology
- Phycology
- Plant Developmental Genetics
Background:
- Understanding seaweed spore development is crucial for reproductive strategies and cultivation.
- Pyropia yezoensis (Nori) is an economically important seaweed species.
Purpose of the Study:
- To elucidate the genetic mechanisms underlying spore development in Pyropia yezoensis.
- To characterize a mutant with defects in spore development.
Main Methods:
- Insertional mutagenesis was used to generate genetic transformants.
- Phenotypic characterization of the mutant under light microscopy.
- Whole-genome sequencing to identify the mutation and associated genomic alterations.
Main Results:
- A mutant strain exhibited reduced spore release and germination failure.
- Mutant spores failed to adhere to substratum and develop cell walls.
- Whole-genome sequencing revealed DNA alterations, including a 13 kb deletion near an insertion site.
- The deleted region contained a plant homeodomain gene.
Conclusions:
- Homeodomain-containing proteins likely play a regulatory role in Pyropia yezoensis spore development.
- The identified mutation provides insights into seaweed reproductive processes.
- Findings could inform strategies for improving seaweed cultivation and breeding.
Keywords:
Pyropia yezoensisBangiaceaeRhodophytaarcheosporeconchosporeinsertional mutagenesismarine red macroalgaemutantspore developmentzygotosporeMore Related Videos
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