In plants, meristems are responsible for generating new organs while also maintaining totipotency (Wolff, 1759). The organiza-tion of the shoot apical meristem and its cytohistochemical zonation is directly related to the growth and development of all lateral organs in vascular plants.
Bringing the multicellular fern meristem into focus
Jan 12, 2016 · The shoot apical meristem (SAM) has usually a prominent apical cell of a tetrahedral shape in most ferns …’ (Schneider, 2013, p. 123). However, a correctly defined fern meristem as multicellular is integral for interpreting broad …
Cell Division and Meristem Dynamics in Fern Gametophytes - MDPI
Jan 3, 2023 · Confocal images of the three meristem types in fern gametophytes: apical cell-based (A–C,F), multicellular apical (D), and multicellular marginal (E,F). Asterisks and arrows indicate the wedge-shaped apical cells and multicellular meristems, respectively.
Quantitative live-imaging reveals the dynamics of apical cells …
Instead of harbouring a multicellular meristem containing cells with distinct identities, the apical cells (ACs) have been identified in bryophytes and ferns, which are considered to be the initial cells contributing to organ growth.
The evolution, morphology, and development of fern leaves
Although the SAM of the ferns and seed plants differ anatomically (because of the presence of apical initial(s) in ferns), they are similar by having distinct zones of cells in the meristem (Wardlaw, 1963; White, 1971; McAlpin and White, 1974; …
Positional cues and cell division dynamics drive meristem ... - Nature
Jul 1, 2022 · Fern gametophytes are autotrophic and independent of sporophytes, and they develop pluripotent meristems that drive prothallus development and sexual reproduction.
Cell growth dynamics in two types of apical meristems in fern ...
In this study, we used Woodsia obtusa, the blunt-lobe cliff fern, to quantitatively determine cell growth dynamics in two different types of apical meristems - the apical initial centered meristem and the multicellular apical meristem in gametophytes.
The evolution of the shoot apical meristem from a gene …
Jul 7, 2015 · Ferns (monilophytes) and some lycophytes, including Selaginella moellendorffii, have apical meristems that are unusual compared to the apical meristems of angiosperms.
Anatomy and development of the fern sporophyte
Detailed histological and experimental studies of the organization of the fern shoot apical meristem have reconfirmed the recently controversial role of the shoot apical cell as the single apical initial of the meristem.
Bringing the multicellular fern meristem into focus - PubMed
Keywords: Class I KNOX genes; apical initial; ferns; lycophytes; meristems.