Morphological characters of the seed coat in selected species of the genus Hypericum L. and their taxonomic value

Szkudlarz, Piotr; Celka, Zbigniew

doi:10.1515/biorc-2016-0022

Cited by 6 publications

(10 citation statements)

References 10 publications

(3 reference statements)

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“…The seed coat was covered by abundant superficial sculptures. The anatomical and ontogenetic characteristics of seed microsculptures could be used for taxonomic identification of plant species (Schenk et al 2013;Szkudlarz and Celka, 2016). According to previous morphological and ultrastructural studies of the seed coat (Fredes et al, 2016), the seed coat sculpture development in Z. fabago could be divided into the following stages:…”

Section: Discussionmentioning

confidence: 99%

Study of seed coat microsculpture organization during seed development inZygophyllumfabago (Zygophyllaceae)

Kazemi¹,

Kazemian²,

Majidzadeh³

et al. 2019

Turk J Bot

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The ontogeny of seed coat and endosperm tissue in Zygophyllum fabago L. was studied to determine their developmental importance using different histochemical and microscopic techniques. Our results revealed that the ovule of Z. fabago was of the anatropous and bitegmic type. The inner epidermis cells were retained up to the end of seed development, whereas the other layers were removed in the early stages. Moreover, the outer integument was changed into the seed coat sculptures during the seed development. Concurrently, multiple cytoplasmic strings were formed at the seed coat cells. Fluorescence microscopic analysis indicated that callose and polyphenols were laid down at these strings. In the late stages of the seed development, the nucleus and cytoplasm of the cells were degenerated and the sculptures became obvious on the seed coat. The seed coat sculptures may play a role in the seed dispersal by wind. During the early developmental stages, the endosperm was of the nuclear type and then changed into the cellular type. Cytochemical tests indicated that in the later stages of seed development, the formation of starch grains and the thickening of cell walls occurred, causing considerable reduction of cell cavities as well as hardening the tissue. The cell storage in the endosperm tissue was more lipidbased than protein-based. Generally, due to the degeneration of the outer integument and the existence of the thin inner integument, the endosperm cell wall seemed to be thickened to protect the embryo and to save carbohydrates. The obtained results shed more light on the development of seed tissues in the family Zygophillaceae.

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Section: Discussionmentioning

confidence: 99%

Study of seed coat microsculpture organization during seed development inZygophyllumfabago (Zygophyllaceae)

Kazemi¹,

Kazemian²,

Majidzadeh³

et al. 2019

Turk J Bot

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“…Many authors highlighted the systematic value of the structural form of the seed coat due to its low phenetic variation of the species (e.g. : Barthlott 1981;Elisens & Tomb 1983;Martinez-Ortega & Rico 2001;Muñoz-Centeno et al 2006, 2007Szkudlarz 2009;Szkudlarz & Celka 2016). The use of SEM made it possible to determine general types of seed coat sculpturing.…”

Section: Discussionmentioning

confidence: 99%

“…Fruit and seed traits play a significant role in the taxonomy of many species (Stace 1989;Szkudlarz 2009;Davitashvili & Karrer 2010;Szkudlarz & Celka 2016). The morphology and micromorphology of seeds are often utilised for taxonomic purposes also in Plantaginaceae and related families, like Scrophulariaceae or Orobanchaceae (e.g.…”

Section: Introductionmentioning

confidence: 99%

Taxonomic importance of seed morphology of Veronica L. subsect. Agrestes Benth. (Plantaginaceae)

Mazur

Gawlak

Sandurska

et al. 2018

Biodiversity Research and Conservation

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The study was conducted on five species of Veronica L. subsection Agrestes occurring in Central Europe: Veronica agrestis L., V. polita Fr., V. opaca Fr., V. persica Poir. and V. filiformis Sm. These species are very similar morphologically and are often misidentified. Last thorough studies of morphology and micromorphology of their seeds were conducted in 1960s. Based on 48 herbarium specimens, we examined SEM images of 422 seeds. We found that 22 of the 30 studied morphological traits differentiated five species at statistical level and V. agrestis and V. persica differed with the greatest number of features from other species. Our measurements of seed size were not fully congruent with previous studies, suggesting dependence of these features on external conditions. Seeds were usually cochlidiospermous and ovoid with a reticulate-verrucate seed coat, but these features were, at the same time, quite variable. The results of discriminant function confirmed that some characters of the seed size, shape and coat sculpture could be taxonomically useful in distinguishing species of Veronica subsect. Agrestes. In addition, we believe that similarity of the examined seeds may confirm unity of this group and the need of identifying a subsection.

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“…Fifty seeds were investigated for each taxon. Fully mature and healthy seeds were carefully prepared for LM as described by Szkudlarz and Celka (2016). Photographs and morphological observations were taken using ultra-depth-of-field microscope VHX-6000 (KEYENCE Corporation, Japan) at 50Â and 200Â magnification, respectively.…”

Section: Light Microscopymentioning

confidence: 99%

“…Seed morphology can serve as a common source of taxonomic characters to identify sections or hypothesize relationships among taxa within Hypericum (Alonso et al, 2013;Meseguer & Sanmartín, 2012;Núñez, 1982;Szkudlarz & Celka, 2016). In his taxonomic treatment of Hypericum, Robson (1981) (Robson, 2010a(Robson, , 2012.…”

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confidence: 99%

Seed morphology of Hypericum (Hypericaceae) in China and its taxonomic significance

Bai

Zhao

Drew

et al. 2023

Microscopy Res & Technique

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The seed morphology of 40 taxa within the genus Hypericum (Hypericaceae) from China, representing 9 sections of the genus, was examined using both Light and Scanning Electron Microscopy to evaluate the taxonomic relevance of macro‐ and micro‐morphological features. Details articulating variation in seed size, color, shape, appendages, and seed coat ornamentation are described, illustrated, and compared, and their taxonomic importance is discussed. Seeds were generally brown in color and cylindric‐ellipsoid to prolonged cylindric in shape. Seed size displayed wide variation, ranging from 0.37–1.91 mm in length and 0.12–0.75 mm in width. Seed appendages were observed as a characteristic morphological feature. Seed surface ornamentation has high phenotypic plasticity, and four types (reticulate, foveolate, papillose, and ribbed) can be recognized. In general, seed color and shape have limited taxonomic significance. However, some other features represent informative characters that can be used efficiently in distinguishing the studied taxa at the section and/or species levels. The findings illustrate that considerable taxonomic knowledge can be obtained by investigating the seed features of Hypericum, and the use of Scanning Electron Microscopy can reveal inconspicuous morphological affinities among species and play a role in taxonomic and systematic studies of the genus Hypericum.Research Highlights Macro‐ and micro‐morphological features of seeds of 40 Hypericum taxa from China were examined using Light and Scanning Electron Microscopy, providing the first broad study regarding seed morphology for Hypericum from China. Details and variations of seed size, shape, color, surface ornamentation, and appendages are fully presented. Seed features and their variation have important taxonomic significance at the section and/or species levels within Hypericum.

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Morphological characters of the seed coat in selected species of the genus Hypericum L. and their taxonomic value

Cited by 6 publications

References 10 publications

Study of seed coat microsculpture organization during seed development inZygophyllumfabago (Zygophyllaceae)

Study of seed coat microsculpture organization during seed development inZygophyllumfabago (Zygophyllaceae)

Taxonomic importance of seed morphology of Veronica L. subsect. Agrestes Benth. (Plantaginaceae)

Seed morphology of Hypericum (Hypericaceae) in China and its taxonomic significance

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