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- W2037247258 abstract "Abstract Japanese red maple, Acer pycnanthum , is an endangered wetland species having dioecious sex expression. Prior studies conclude that land development has caused severe loss of habitat, and seedling regeneration is rare. However, information is lacking on sexual reproduction, which is the first critical stage of regeneration. My research objective was to describe flowering and fruiting characteristics of Japanese red maple, focusing on tree sizes at the onset of flowering, factors affecting flowering regularity and fruit abundance, periodicity of fruit production, and sex ratio. In a study of a young population, Japanese red maple initiated flowering at a small size under 100% light intensity. Initiation of flowering occurred at relatively lower height in males than females, and males flowered more regularly than females. A survey of 1,106 clones from 46 natural populations revealed that male clones were significantly more abundant than female clones. In a 4‐year study of mature populations, nearly all clones flowered regularly, and fruit abundance of dominant females was typically high. Fruit abundance at the population level also remained high, although fruit abundance of individual female clones varied year by year. Therefore, sexual reproductive ability is highly vigorous. Sex ratio exhibited a major deviation from a 1:1 ratio in populations with a small number of clones. In conservation planning, we should prioritize avoidance of an unbalanced sex ratio by increasing population sizes. In addition, populations having many clones >40 cm dbh with large, well‐lighted crowns have a high potential of regular and abundant seed production." @default.
- W2037247258 created "2016-06-24" @default.
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- W2037247258 date "2007-10-16" @default.
- W2037247258 modified "2023-10-11" @default.
- W2037247258 title "Sexual reproductive biology of the endangered Japanese red maple (<i>Acer pycnanthum</i>)" @default.
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- W2037247258 doi "https://doi.org/10.1007/s11284-007-0431-7" @default.
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