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KMID : 0368419850280010045
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Journal of Plant Biology
1985 Volume.28 No. 1 p.45 ~ p.55
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Notes on Reproduction in Rhodochorton purpureum (Lightfoot) Rosenvinge (Rhodophyta) with Special Reference to Hokkaido Plants
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Lee Yong-Pil
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Abstract
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Observations on reproduction of Rhodochorton purpureum(Lightfoot) Rosenvinge(Acrochaetiaceae, Rhodophyta) was carried out with plants from Hokkaido, Japan. This species produces no monosporangia both in nature and culture, even though it does tetrasporangia commonly. The plants from Nemuro produce neither sporangia nor gametangia, and thus vegetative reproduction is the only known way to propagate themselves. It is suggested that the vegetative reproduction occurs in nature by fragmentation of vegetative filaments after development of a rhizoid. Several different modes of rhizoid production are described. The plants from Akkeshi and Oshoro (Ⅰ) produce tetrasporangia that develop into plants producing only tetrasporangia. The plants from Muroran and Oshoro (Ⅱ) produce tetrasporangia that develop into gametophytes. Gametophytes of R. purpureum from Muroran produce tetrasporangia as well as spermatangia or carpogonia. Such tetrasporangia on gametophytes are presumed to be mitotic.
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