Genetic consequences of Last Glacial-Holocene changes in snowfall regime in Arnica mallotopus populations: A plant confined to heavy-snow areas of Japan.

Autor: Masuda K; Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-Nihonmatsu-cho, Sakyo-ku, 606-8501, Kyoto, Japan., Setoguchi H; Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-Nihonmatsu-cho, Sakyo-ku, 606-8501, Kyoto, Japan.; Graduate School of Global Environmental Studies, Kyoto University, Yoshida-Honmachi, Sakyo-ku, 606-8501, Kyoto, Japan., Nagasawa K; Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-Nihonmatsu-cho, Sakyo-ku, 606-8501, Kyoto, Japan., Hirota SK; Field Science Center, Graduate School of Agricultural Science, Tohoku University, 232-3 Aza-yomogida, Naruko Onsen, Osaki, 989-6711, Miyagi, Japan., Suyama Y; Field Science Center, Graduate School of Agricultural Science, Tohoku University, 232-3 Aza-yomogida, Naruko Onsen, Osaki, 989-6711, Miyagi, Japan., Sawa K; Tendo, Yamagata, Japan., Fukumoto S; Ashiu Biological Conservation project, Kyoto, Japan., Ishihara MI; Ashiu Forest Research Station, Kyoto University, Ashiu, Miyama-cho, Nantan, 601-0703, Kyoto, Japan., Abe H; Faculty of Agriculture, Niigata University, Sado, 952-2206, Niigata, Japan., Tsuboi H; Hakubagoryu Alpine Botanical Garden, Hakuba, Kita-ado, Nagano, Japan., Tango T; Oki gun, Shimane, Japan., Mori S; Higashiohmi, Shiga, Japan., Sakaguchi S; Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-Nihonmatsu-cho, Sakyo-ku, 606-8501, Kyoto, Japan.; Graduate School of Global Environmental Studies, Kyoto University, Yoshida-Honmachi, Sakyo-ku, 606-8501, Kyoto, Japan.
Jazyk: angličtina
Zdroj: American journal of botany [Am J Bot] 2024 Feb; Vol. 111 (2), pp. e16275. Date of Electronic Publication: 2024 Feb 02.
DOI: 10.1002/ajb2.16275
Abstrakt: Premise: Snow is an important environmental factor affecting plant distribution. Past changes in snowfall regimes may have controlled the demographies of snow-dependent plants. However, our knowledge of changes in the distribution and demographies of such plants is limited because of the lack of fossil records.
Methods: Population genetic and landscape genetic analyses were used to investigate the response of population dynamics of Arnica mallotopus (Asteraceae)-a plant confined to heavy-snow areas of Japan-to changes in snowfall regimes from the Last Glacial Period to the Holocene.
Results: The population genetic analysis suggested that the four geographic lineages diverged during the Last Glacial Period. The interaction between reduced snowfall and lower temperatures during this period likely triggered population isolation in separate refugia. Subpopulation differentiation in the northern group was lower than in the southern group. Our ecological niche model predicted that the current distribution was patchy in the southern region; that is, the populations were isolated by topologically flat and climatically unsuitable lowlands. The landscape genetic analysis suggested that areas with little snowfall acted as barriers to the Holocene expansion of species distribution and continued limiting gene flow between local populations.
Conclusions: These findings indicate that postglacial population responses vary among regions and are controlled by environmental and geographic factors. Thus, changes in snowfall regime played a major role in shaping the distribution and genetic structure of the snow-dependent plant.
(© 2024 Botanical Society of America.)
Databáze: MEDLINE
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