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Effects of nutrient availability on the amphicarpic traits of Persicaria thunbergii

Cited 6 time in Web of Science Cited 9 time in Scopus
Authors
Kim, Jae Hyun; Nam, Jong Min; Kim, Jae Geun
Issue Date
2016
Publisher
Elsevier
Citation
Aquatic Botany, vol.131, pp. 45–50
Keywords
AllocationAmphicarpyNutrientLife-history strategies
Abstract
Environmental factors affecting the expression of amphicarpic traits in Persicaria thunbergii are not well
studied.We thus performed to investigate the effects of nutrients on the amphicarpic traits of P.thunbergii
in a mesocosm experiment. Three nutrient levels were applied using different intervals between fertilization:
no fertilization (low nutrient), fertilization at eight-week intervals (medium), and at four-week
intervals (high). We compared the relative stem length growth rates (RGRST) and biomass allocation of
seedlings from aerial seeds (SA) and subterranean seeds (SS), and then investigated the flowering time
and the seed production traits of P. thunbergii according to nutrient level. The results showed that RGRST,
biomass allocation and total biomass were not different between SA and SS at all levels. Aerial flowering
started earlier than subterranean flowering, in contrast to other amphicarpic plants. Subterranean seed
allocation and the number of subterranean seeds were stable regardless of nutrient levels whereas aerial
seed allocation decreased with increasing nutrient level. The number of aerial seeds per biomass with
low nutrient was significantly higher than that at other levels. P. thunbergii showed a different trait of
seed production: subterranean seeds appeared to play a role in retaining the mother-site while aerial
seeds can escape the site conditions at low nutrient levels. In conclusion, the reproductive strategy of P.
thunbergii on aerial propagule was changeable but not subterranean propagule under various nutrient
conditions. SA and SS were similar about growth responses. Those characteristics would increase survivability
of P. thunbergii. Evolutionary drivers might explain the differences of life-history strategies in
flowering time between the aquatic P. thunbergii and other arid amphicarpic plants
Language
English
URI
http://hdl.handle.net/10371/95802
DOI
https://doi.org/10.1016/j.aquabot.2016.03.001
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College of Education (사범대학)Dept. of Science Education (과학교육과)Biology (생물전공)Journal Papers (저널논문_생물전공)
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