Seed reproductive biology of the rare aquatic carnivorous plant Aldrovanda vesiculosa L. (Droseraceae)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985939%3A_____%2F16%3A00459953" target="_blank" >RIV/67985939:_____/16:00459953 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1111/boj.12387" target="_blank" >http://dx.doi.org/10.1111/boj.12387</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/boj.12387" target="_blank" >10.1111/boj.12387</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Seed reproductive biology of the rare aquatic carnivorous plant Aldrovanda vesiculosa L. (Droseraceae)

Popis výsledku v původním jazyce

This study aimed to investigate the role of seed-based reproduction in the ecology of A.vesiculosa, with particular focus on the interplay between the regulation of seed dormancy by temperature cues and the efficacy of exogenous ethylene gas to act as a germination stimulant, the desiccation capacity and long-term storage potential of seeds for conservation purposes. Sexual reproduction appears to be extremely limited in both natural and naturalized populations across three continents, with high variability in the success of flowering and seed set between sites and between seasons. Overall, flowering yielded few fertile fruit (6-19% of flowers producing fertile fruit) and seed viability was variable but generally low (29-88%). Fecundity appears to be influenced by seasonal climatic conditions and microhabitat characteristics. Aldrovanda vesiculosa possesses physiologically dormant seeds, with germination stimulated by exposure to ethylene gas (>90% germination) at 25 degrees C. Seeds appear sensitive to desiccation and sub-zero temperature storage, with no germination and markedly reduced embryo growth after storage of seeds for >1month at 15 degrees C and 15% relative humidity or after short-term (24h) storage at -18 degrees C. In the absence of significant conservation and restoration initiatives, the continuing decline of dystrophic freshwater wetland habitats globally leaves A.vesiculosa facing extinction. As the successful long-term storage of seeds appears unfeasible based on the approaches described in this study, other alternatives for germplasm conservation such as cryostorage of vegetative tissues or zygotic embryos must be considered for establishing long-term ex situ collections of critical germplasm.

Název v anglickém jazyce

Seed reproductive biology of the rare aquatic carnivorous plant Aldrovanda vesiculosa L. (Droseraceae)

Popis výsledku anglicky

This study aimed to investigate the role of seed-based reproduction in the ecology of A.vesiculosa, with particular focus on the interplay between the regulation of seed dormancy by temperature cues and the efficacy of exogenous ethylene gas to act as a germination stimulant, the desiccation capacity and long-term storage potential of seeds for conservation purposes. Sexual reproduction appears to be extremely limited in both natural and naturalized populations across three continents, with high variability in the success of flowering and seed set between sites and between seasons. Overall, flowering yielded few fertile fruit (6-19% of flowers producing fertile fruit) and seed viability was variable but generally low (29-88%). Fecundity appears to be influenced by seasonal climatic conditions and microhabitat characteristics. Aldrovanda vesiculosa possesses physiologically dormant seeds, with germination stimulated by exposure to ethylene gas (>90% germination) at 25 degrees C. Seeds appear sensitive to desiccation and sub-zero temperature storage, with no germination and markedly reduced embryo growth after storage of seeds for >1month at 15 degrees C and 15% relative humidity or after short-term (24h) storage at -18 degrees C. In the absence of significant conservation and restoration initiatives, the continuing decline of dystrophic freshwater wetland habitats globally leaves A.vesiculosa facing extinction. As the successful long-term storage of seeds appears unfeasible based on the approaches described in this study, other alternatives for germplasm conservation such as cryostorage of vegetative tissues or zygotic embryos must be considered for establishing long-term ex situ collections of critical germplasm.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

EF - Botanika

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Botanical Journal of the Linnean Society

ISSN

0024-4074

e-ISSN

—

Svazek periodika

180

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

15

Strana od-do

515-529

Kód UT WoS článku

000373012000007

EID výsledku v databázi Scopus

2-s2.0-84961199126