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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

—

Czech description

—

Type

J_ost - Miscellaneous article in a specialist periodical

CEP classification

—

OECD FORD branch

10506 - Paleontology

Project

<a href="/en/project/GA21-10799S" target="_blank" >GA21-10799S: Environmental control on the rise and fall of the earliest land plant assemblages of Silurian volcanic islands of the Prague Basin (Czech Republic)</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

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

Name of the periodical

Folia Musei rerum naturalium Bohemiae occidentalis

ISSN

1805-2371

e-ISSN

1805-286X

Volume of the periodical

56

Issue of the periodical within the volume

1-2

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

16

Pages from-to

11-26

UT code for WoS article

—

EID of the result in the Scopus database

—