@article{oai:nipr.repo.nii.ac.jp:00010151,
 author = {Tomita, Miki and Masuzawa, Takehiro and Tomita, Miki and Masuzawa, Takehiro},
 issue = {1},
 journal = {Polar science, Polar science},
 month = {May},
 note = {We investigated the effects of microenvironmental conditions on the reproductive characteristics of Polygonum viviparum in the Southern Alps of Japan. We examined environmental differences and the distribution of P. viviparum at four study sites on the southeast-facing cirque of Mt Maedake. P. viviparum was found at two sites, where the humic loam layer was well developed on the soil surface. The timing of snowmelt differed considerably between these two sites. On average, the ratio of flowers to bulbils per inflorescence was low and the production of bulbils was high in the population experiencing later snowmelt. The mean maximum leaf area, number of flowers per inflorescence, and fresh weight of bulbils decreased with decreasing length of the growing season. In contrast, the number of individuals without inflorescences increased with decreasing length of the growing season. The starch content of the rhizomes of each individual was similar, regardless of the presence of flowers in the inflorescence. Within rhizomes, the starch content in the old rhizome was lower than that in the new and central portions of the rhizome. The starch content of the oldrhizome was higher in individuals without inflorescences; starch appeared to be consumed for inflorescence production., 周北極要素の植物であるムカゴトラノオは、花茎に有性生殖器官の花と無性生殖器官のムカゴをつける。分布の南限にあたる日本の南アルプスにはカール地形が存在し、地形や消雪時期の違いによりいくつかの植物群落がみられる。この中でムカゴトラノオは土壌が安定し、地表面に腐植質土層が存在する場所に生育していた。ムカゴトラノオの生育する群落の消雪時期の遅い群落では、花茎につける花の数が減少し、植物体が小さく、繁殖を行わない個体が多かった。また、花茎をつけて繁殖を行うために、多量のデンプンを消費していることが、地下茎のデンプン濃度の比較により明らかとなった。これらは生育可能期間の短い環境に対する応答であることが示唆された。},
 pages = {62--70},
 title = {Reproductive mode of Polygonum 1 viviparum depends on environment},
 volume = {4},
 year = {2010}
}