Seed germination ecology of common bladderwort (Utricularia vulgaris L.)

0562207 - BÚ 2023 RIV NL eng J - Journal Article
Prausová, R. - Holzbauerová, H. - Špringrová, I. - Jará, N. - Šafářová, L. - Cross, A. T. - Adamec, Lubomír
Seed germination ecology of common bladderwort (Utricularia vulgaris L.).
Aquatic Botany. Roč. 182, OCT 2022 (2022), č. článku 103545. ISSN 0304-3770. E-ISSN 1879-1522
Institutional support: RVO:67985939
Keywords : Lentibulariaceae * morphophysiological doemancy * seed storage
OECD category: Plant sciences, botany
Impact factor: 1.8, year: 2022
Method of publishing: Limited access
https://doi.org/10.1016/j.aquabot.2022.103545

We tested the germination response of seeds of the carnivorous aquatic plant Utricularia vulgaris (Lentibulariaceae) under various temperature and seed storage regimes, to examine the processes required for seed dormancy alleviation and the effects of different germination solution and temperature on germination probability. Seeds likely possess non-deep simple morphophysiological dormancy alleviated by warm stratification. Highest germination success was recorded for warm-stratified seeds and seeds exposed to ethylene. Seeds were photophilous, with germination more successful at 21 ◦C than at 25 ◦C and greatest in slightly alkaline (pH 8) germination solution containing KHCO3, CaCl2 and MgSO4 mimicking the mesotrophic humic waters in which the species naturally occurs. In the alkaline solution, 97 % of seeds rose to the surface prior to germination. In natural habitats, this effect may facilitate seedlings reaching the warmer and irradiated water surface. As seed germination success appears linked to light availability, water chemistry, and seed position in the water column, careful management and ecological restoration of remnant habitats harbouring this species may need to ensure positive conservation outcomes.
Permanent Link: https://hdl.handle.net/11104/0334637