Cell Division Patterns in the Peristomial Layers of the Moss Genus Costesia: Two Hypotheses and a Third Solution.

Autor:	Ignatov MS; Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia.; Tsitsin Main Botanical Garden, Russian Academy of Sciences, Moscow, Russia., Spirina UN; Tsitsin Main Botanical Garden, Russian Academy of Sciences, Moscow, Russia.; Faculty of Biology, Tver State University, Tver, Russia., Kolesnikova MA; Tsitsin Main Botanical Garden, Russian Academy of Sciences, Moscow, Russia., Larraín J; Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile., Ignatova EA; Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia.
Jazyk:	angličtina
Zdroj:	Frontiers in plant science [Front Plant Sci] 2020 Sep 04; Vol. 11, pp. 536862. Date of Electronic Publication: 2020 Sep 04 (Print Publication: 2020).
DOI:	10.3389/fpls.2020.536862
Abstrakt:	The Chilean endemic genus Costesia belongs to the Gigaspermaceae, one of the most basal groups of arthrodontous mosses. While none of the species in this family has a peristome, earlier stages of sporophyte development often disclose its basic structure. The study of Costesia sporophytes at the early stages of development was conducted to identify possible similarities with Diphyscium , the genus sister to Gigaspermaceae plus all other arthrodontous mosses in the moss phylogenetic tree. Diphyscium shares a strongly unequal cell division pattern with the Dicranidae. In groups more closely related to Diphyscium , as it is the case of Costesia , this pattern is not known. Our study of Costesia found only irregular presence of slightly unequal cell divisions that may then be considered as a plesiomorphic state in peristomate mosses. The most frequently present pattern revealed in Costesia is common with the Polytrichaceae, a more basal moss group with nematodontous peristomes. (Copyright © 2020 Ignatov, Spirina, Kolesnikova, Larraín and Ignatova.)
Databáze:	MEDLINE
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