Reproductive interference between alien species in Veronica.

Autor: Nishida S; Graduate School of Environmental Studies, Nagoya University, Furo‑cho, Chikusa‑ku, Nagoya, 464‑8601, Japan. sach.nishida@gmail.com.; Nagoya University Museum, Furo‑cho, Chikusa‑ku, Nagoya, 464‑8601, Japan. sach.nishida@gmail.com., Tamakoshi N; Graduate School of Environmental Studies, Nagoya University, Furo‑cho, Chikusa‑ku, Nagoya, 464‑8601, Japan., Takakura KI; School of Environmental Science, The University of Shiga Prefecture, Yasaka‑cho, Hikone, 552‑0057, Japan., Watanabe Y; Graduate School of Environmental Studies, Nagoya University, Furo‑cho, Chikusa‑ku, Nagoya, 464‑8601, Japan., Kanaoka MM; Graduate School of Science, Nagoya University, Furo‑cho, Chikusa‑ku, Nagoya, 464‑8601, Japan.; Faculty of Bioresource Sciences, Prefectural University of Hiroshima, Nanatsuka-Cho, Shobara, 727-0023, Japan.
Jazyk: angličtina
Zdroj: Journal of plant research [J Plant Res] 2024 Mar; Vol. 137 (2), pp. 167-178. Date of Electronic Publication: 2023 Dec 18.
DOI: 10.1007/s10265-023-01510-3
Abstrakt: Reproductive interference can lead to the exclusive distribution of species. Reports on reproductive interference between alien species are scarce, although alien species are becoming more abundant and evaluations of the interference between aliens and its influence on community structure are essential. We therefore investigated the presence of interference in two alien species of Veronica, V. cymbalaria and V. persica. Hand-pollination experiments revealed that heterospecific pollen adversely affected both species, but asymmetrically: in V. cymbalaria, it reduced the number of seeds both before and after conspecific pollination, but in V. persica it reduced the number of seeds only when it occurred before conspecific pollination. Field observation suggested that the number of seeds produced by V. cymbalaria was more influenced by the number of conspecific flowers than by the frequency of surrounding V. persica flowers. Pot experiments did not show a negative effect of heterospecific individuals on the reproductive success of focal species in either species. Observations of visiting pollinators revealed no pollinator preference between the plant species. Although we demonstrated asymmetrical reproductive interference between V. cymbalaria and V. persica, its effect in the field seemed limited. An essential factor mitigating the adverse effect of reproductive interference might be a shortage of pollinators that could facilitate interspecific pollination. We predict that further invasion of V. cymbalaria into areas where V. persica prevails is unlikely, although swift displacement of V. cymbalaria by V. persica in areas where V. cymbalaria is already established is also unlikely.
(© 2023. The Author(s) under exclusive licence to The Botanical Society of Japan.)
Databáze: MEDLINE
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