Heterosporangia in Isoetes pantii (Isoetaceae, Pteridophyta): revealing the beginnings of heterospory and recalling paleozoic ancestors?

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F22%3A00562235" target="_blank" >RIV/67985831:_____/22:00562235 - isvavai.cz</a>

Výsledek na webu

<a href="https://folia.zcm.cz/archives/25-vol-56-no-1-2-2022/49-heterosporangia-isoetes-pantinii" target="_blank" >https://folia.zcm.cz/archives/25-vol-56-no-1-2-2022/49-heterosporangia-isoetes-pantinii</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2478/fbgp-2022-0002" target="_blank" >10.2478/fbgp-2022-0002</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Heterosporangia in Isoetes pantii (Isoetaceae, Pteridophyta): revealing the beginnings of heterospory and recalling paleozoic ancestors?

Popis výsledku v původním jazyce

The extant plant genus Isoetes (Isoetaceae, lycophyte, quillwort) is important from an evolutionary point of view. Species of this heterosporous genus are small herbs (up to 50 centimeters) and exhibit some morphological, anatomical and embryological features of their Paleozoic arborescent lycopsid ancestors. The species Isoetes pantii produces three kinds of microspores (monolete, alete and trilete) and two types of trilete megaspores in one and the same heterosporangium. We attempt to associate these unusual functional megaspores with various Paleozoic spores described mainly from Devonian barinophytaleans such as Omniastrobus dawsonii, Barinophyton richardsonii, B. citrulliforme and Protobarinophyton pennsylvanicum. These have two kinds of spores in a sporangium and provide the first palynological evidence of heterospory at 405 Ma. The germination of microspores and megaspores and production of gametophytes within the heterosporangia of I. pantii corresponds with that of some of its Paleozoic ancestors. Retention of megaspores within heterosporangia and their germination in situ offers evidence that I. pantii exhibits the probable route of evolution of the seed habit. These observations support the hypothesis that a typical heterosporangium was the cradle for the evolution of heterospory.

Název v anglickém jazyce

Heterosporangia in Isoetes pantii (Isoetaceae, Pteridophyta): revealing the beginnings of heterospory and recalling paleozoic ancestors?

Popis výsledku anglicky

The extant plant genus Isoetes (Isoetaceae, lycophyte, quillwort) is important from an evolutionary point of view. Species of this heterosporous genus are small herbs (up to 50 centimeters) and exhibit some morphological, anatomical and embryological features of their Paleozoic arborescent lycopsid ancestors. The species Isoetes pantii produces three kinds of microspores (monolete, alete and trilete) and two types of trilete megaspores in one and the same heterosporangium. We attempt to associate these unusual functional megaspores with various Paleozoic spores described mainly from Devonian barinophytaleans such as Omniastrobus dawsonii, Barinophyton richardsonii, B. citrulliforme and Protobarinophyton pennsylvanicum. These have two kinds of spores in a sporangium and provide the first palynological evidence of heterospory at 405 Ma. The germination of microspores and megaspores and production of gametophytes within the heterosporangia of I. pantii corresponds with that of some of its Paleozoic ancestors. Retention of megaspores within heterosporangia and their germination in situ offers evidence that I. pantii exhibits the probable route of evolution of the seed habit. These observations support the hypothesis that a typical heterosporangium was the cradle for the evolution of heterospory.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

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OECD FORD obor

10506 - Paleontology

Projekt

<a href="/cs/project/GA21-10799S" target="_blank" >GA21-10799S: Vliv prostředí na vzestup a pád nejstarších rostlinných společenstev, která osídlila silurské vulkanické ostrovy Pražské pánve (Česká republika)</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Folia Musei rerum naturalium Bohemiae occidentalis

ISSN

1805-2371

e-ISSN

1805-286X

Svazek periodika

56

Číslo periodika v rámci svazku

1-2

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

16

Strana od-do

11-26

Kód UT WoS článku

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EID výsledku v databázi Scopus

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