Abstract
Diploid Apogamy in Red Algal Species of the Genus Pyropia
Highlights
The life cycle of the marine red alga Pyropia yezoensis, in particular, does not conform to the general concept of a requirement for meiosis in gametophyte production
We recently demonstrated that gametophyte identity in P. yezoensis is established without meiosis in the conchosporangia, which are parasitically produced on sporophytes [10,21]
The diploidy of the sporophytes produced from somatic cells was confirmed in P. haitanensis by karyotype analysis, which indicated that the ploidy of red-colored cells preprogrammed to generate sporophytes is autonomously doubled before the production of sporophyte filaments [27]
Summary
The life cycle of the marine red alga Pyropia yezoensis, in particular, does not conform to the general concept of a requirement for meiosis in gametophyte production. We proposed that P. yezoensis has a triphasic life cycle consisting of gametophyte, sporophyte, and conchosporophyte, which represents novel nomenclature denoting the conchosporangium as a life cycle generation [21].
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