A new species of Isoetes (Isoetaceae) from Turkey, with a study of microphyll intercellular pectic protuberances and their potential taxonomic value

Abstract

Isoetes anatolica sp. nov. is described from a population growing in seasonal ponds of a mountain near the southern coast of the Black Sea in Bolu, Turkey. It is a robust, amphibious quillwort, characterized by semiterete, carnose microphylls, semicircular foliar section, smooth cuticle, prominent cuticular pegs, stomata, several collenchymatous strands, abundant pectic filaments and connections in the cells of the translacunar diaphragms, incurved alae, well developed ligula, small carnose labium, no velum, well-formed bulliform megaspores and obscurely muriform microspores. Plants were investigated anatomically and a description with additional diagnostic characters is included. Morphological affinities with other species of the genus are discussed. Intercellular pectic protuberances (IPP) were studied in the cells of the translacunar diaphragms of the microphylls of several species of Isoetes including I. anatolica. The IPP were examined to determine if they could provide diagnostic characters. They were detected with TBO and analysed using light and scanning electron microscopy. Types of IPP and species bearing them were as follows: warts in

Especies arborescentes del género <i>Blechnum</i> (Blechnaceae: Pteridophyta)

“…El término arborescente se utiliza tal como se indica en Font Quer (1982) y en Lellinger (2002), y no implica la existencia de un hábito arbóreo, derivado de la actividad cambial, sino que hace referencia al rizoma erecto y robusto que generalmente presentan estas especies. Los vocablos relacionados con la epidermis han sido utilizados por los autores en trabajos pteridológicos previos, como Prada et al (2008) y Prada & Rolleri (2005) y la relacionada con los estomas se ha tomado de Prabhakar (2003).…”

Intercellular Pectic Protuberances in Asplenium: New Data on their Composition and Origin

“…Subsequently, similar structures were found in the intercellular spaces of seeds, leaves, stems and roots of many monocotyledons, dicotyledons, ferns and fern allies (for a review see Potgieter and van Wyk, 1992). These have been referred to as intercellular wall thickenings (Luerssen, 1873), pectic strands (Carr and Carr, 1975;Carr et al, 1980a, b), pectic filaments (Carr and Carr, 1975;Potgieter and van Wyk, 1992), pectic warts (Kisser, 1928;Carlquist, 1956Carlquist, , 1957, scala (Potgieter and van Wyk, 1992), pectic projections (Davies and Lewis, 1981;Veys et al, 1999Veys et al, , 2000Veys et al, , 2002, microprojections (Rolleri, 1993), beads (Jeffree and Yeoman, 1983; Barnett and Weatherhead, 1988), bead-like projections (Miller and Barnett, 1993), papilla-like structures (Suske and Acker, 1989), protuberances (Donaldson and Singh, 1984), intercellular protuberances (Butterfield et al, 1981;Machado et al, 2000), and intercellular pectic protuberances (IPP) (Potgieter and van Wyk, 1992;Machado and Sajo, 1996;Rolleri, 2002;Mengascini, 2002;Prada and Rolleri, 2005;Rolleri and Prada, 2006). Besides Asplenium, protuberances in ferns and fern allies have been studied in Angiopteris (Carr and Carr, 1975;Rolleri, 2002;Mengascini, 2002), Pteridium (Carr and Carr, 1975), Pteris (Schenck, 1886), Blechnum (Schenck, 1886), Christensenia…”

“…Infraspecific variability in the occurrence, form and distribution of IPPs has been reported for some Hawaiian Asteraceae (Carlquist, 1957), some southern African Icacinaceae (Potgieter and van Wyk, 1992), some Isoetes species (Prada and Rolleri, 2005), and for some Blechnum species (Rolleri and Prada, 2006). Nevertheless, Potgieter and van Wyk (1992) emphasized the need for more anatomical studied to asses the variability at lower taxonomic levels.…”

Clarifying the nomenclature of some Euro‐Mediterranean quillworts (Isoetes, Isoetaceae): Indicator species and species of conservation concern

“…The microspore of I. boryana shown in Romero & Real (2005) is different, however, from the microspore of I. longissima (the two are shown side by side in the same article). Prada & Rolleri (2005) found another character separating I. boryana from I. velata/longissima, i.e., the lack of intercellular pectic protuberances (IPP) in the cells of the translacunar diaphragms of the microphylls. In addition, I. boryana is deemed distinctive by its lack of persistent leaf scales (Rolleri & Prada, 2007).…”