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Local differentiation of flowering phenology in an alpine-snowbed herb Gentiana nipponica

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Title: Local differentiation of flowering phenology in an alpine-snowbed herb Gentiana nipponica
Authors: Kawai, Yuka Browse this author
Kudo, Gaku Browse this author →KAKEN DB
Keywords: alpine plant
growing degree day
phenological adaptation
snowmelt time
temperature sum
Issue Date: Jun-2011
Publisher: NRC Research Press
Journal Title: Botany
Volume: 89
Issue: 6
Start Page: 361
End Page: 367
Publisher DOI: 10.1139/B11-024
Abstract: Phenological events of alpine plants are strongly influenced by the seasonal thermal conditions at the local scale that are caused by heterogeneity in snowmelt time. Populations in late-snowmelt locations suffer from a short period for seed maturation, in which rapid flowering that occurs soon after snowmelt (i.e., a low thermal requirement for flowering) is advantageous. To test the possibility of local adaptation of flowering phenology, we compared reproductive phenology, the preflowering period, and the thermal requirement for flowering of the alpine-snowbed species Gentiana nipponica Maxim. between populations inhabiting early- and late-snowmelt sites within a local area. Plants in the late-snowmelt population showed a shorter preflowering period than in the early-snowmelt population; nevertheless, they often failed to set fruit owing to the short growth period. To test the plasticity and genetic regulation of flowering phenology, we performed a reciprocal transplant experiment between early- and late-snowmelt populations. Although the preflowering period showed clear plastic responses depending on the transplanted habitats, the lower thermal requirement for flowering was retained in plants originating from the late-snowmelt populations, even after transplantation. Therefore, habitat-specific differentiation of flowering phenology was genetically determined between these local populations.
Type: article (author version)
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 川合 由加

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