Size-Structures and Reproductive Characteristics in Diploid and Triploid Populations of Disporum sessile D. Don (Liliaceae) |
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Authors: | YOSHIMICHI HORI TOMOKO YOKOI YOTA YOKOI |
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Institution: | Department of Biology, Faculty of Science, Ibaraki University, Mito 310, Japan;Funako 1319, Atsugi 243, Japan;Biological Laboratory, College of Liberal Arts and Sciences, Kitasato University, Sagamihara 228, Japan |
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Abstract: | Abstract Disporum sessile (Liliaceae), a perennial herb of temperate forests is composed of diploid (2n=16) and triploid (2n=24) populations. The size structure differed remarkably as triploid populations had few small plants and no seedlings. Triploid flowering plants were considerably larger than diploids. Triploids that flowered were 2.5 times larger than diploids that flowered and the size of vegetative ramets produced by triploids was twice as large. In triploids, fruiting rates were quite low only with inviable seeds and vegetative propagule size was greater than that of diploids. As regards growth parameters that help to increase plant size, triploids were superior to diploids. Differences in growth and reproductive parameters between diploids and triploids may contribute to forming different patch sizes. |
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Keywords: | diploid Disporum sessile sexual reproduction triploid vegetative propagation |
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