SEM and stereoscope microscope observations on the seeds of the Polish species of the genus Sorbus L. (Rosaceae)

Maciejewska-Rutkowska, Irmina; Bednorz, Leszek

doi:10.5586/asbp.2004.037

Cited by 12 publications

(16 citation statements)

References 2 publications

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“…The shape and size of cypsela together with other micromorphological features are important revealing characters in species classification. These features can be used at different taxonomic positions to illustrate resemblance among species (Maciejewska‐Rutkowska & Bednorz, ).…”

Section: Resultsmentioning

confidence: 99%

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Taxonomic significance of cypsela morphology in tribe Cichoreae (Asteraceae) using light microscopy and scanning electron microscopy

Ayaz

Ahmad

Zafar

et al. 2019

Microscopy Res & Technique

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The current study deals with the detailed morphology investigation of eight Cypsela species belonging to tribe Cichoreae. The different Cypsela types were described, explained, compared, and their taxonomic significance is discussed in detail. Light microscopy (LM) and scanning electron microscopy (SEM) have been used to highlight quantitative and qualitative characters of underestudied species. Cypsela exhibit great diversity in macro and micromorphological features such as shape, color, length, width, anticlinal and periclinal wall patterns, surface patterns, epicuticular projections. Majority of Cypsela species were brownish in color and their size ranges from 2.16 to 3.98 mm in length and 1.16 to 0.82 mm in breadth. A great diversity in Cypsela shapes like oblanceolate to obovate, obovoid to cylindrical, obvate, narrowly lanceolate were observed. Most of the platelets having epicuticular projections were observed. The surface pattern on the cypsela surface varied from rugose papillate, verrucose papillate, and striated. On the basis of considerable variations observed, the present study can assist as useful constraints at various taxonomic levels. The aim of the present study is to provide a comprehensive description of the Cypsela morphology and to determine the extent to which these micro morphological data can be used as a taxonomic character to delineate various taxa belonging to the tribe Cichoreae.

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Section: Resultsmentioning

confidence: 99%

“…These features can be used at different taxonomic positions to illustrate resemblance among species (Maciejewska-Rutkowska & Bednorz, 2004).…”

Section: Disparities In Quantitative Charactersmentioning

confidence: 99%

Taxonomic significance of cypsela morphology in tribe Cichoreae (Asteraceae) using light microscopy and scanning electron microscopy

Ayaz

Ahmad

Zafar

et al. 2019

Microscopy Res & Technique

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“…In eastern Europe, one of the largest concentrations of S. torminalis occurs in woodlands of the class Querco-Fagetea. In Poland, Slovakia and the Czech Republic, it forms the rare thermophilous association of Sorbo torminalis-Quercetum on acidic soils and is also present in the open, species rich, slightly acidic oak forest Luzulo luzuloidis-Quercetum genistetosum tinctoriae of Poland (Kwiatkowski 2003: Bednorz 2007bMad era et al 2012;Szymura 2012). In Slovakia, S. torminalis is also a component of the basic soil version of the dry-mesic woodland Corno-Quercetum (Prudi c 1998;Role cek 2005).…”

Section: Communitiesmentioning

confidence: 99%

“…In contrast, Rasmussen & Kollmann (2007) found that fencing to exclude roe deer (Capreolus capreolus L.) resulted in root suckers growing a mean of 3Á8 cm in height in one season compared to 0Á6 cm outside exclosures. Certainly, a number of authors suggest that browsing is usually severe enough to prevent the natural regeneration of S. torminalis (Bednorz 2009;Bednorz, Ka zmierczak & Kaczmarek 2012;Mad era et al 2012).…”

Section: Response To Biotic Factorsmentioning

confidence: 99%

Biological Flora of the British Isles:Sorbus torminalis

Thomas

2017

Journal of Ecology

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Summary1. This account presents information on all aspects of the biology of Sorbus torminalis (L.) Crantz (Wild Service-tree) that are relevant to understanding its ecological characteristics and behaviour. The main topics are presented within the standard framework of the Biological Flora of the British Isles: distribution, habitat, communities, responses to biotic factors, responses to environment, structure and physiology, phenology, floral and seed characters, herbivores and disease, history and conservation. 2. Sorbus torminalis is an uncommon, mostly small tree (but can reach 33 m) native to lowland England and Wales, and temperate and Mediterranean regions of mainland Europe. It is the most shade-tolerant member of the genus in the British Isles, and as a result, it is more closely associated with woodland than any other British species. Like other British Sorbus species, however, it grows best where competition for space and sunlight is limited. Seedlings are shade tolerant but adults are only moderately so. This, combined with its low competitive ability, restricts the best growth to open areas. In shade, saplings and young adults form a sapling bank, showing reproduction and extensive growth only when released. Sorbus torminalis tolerates a wide range of soil reaction (pH 3Á5-8Á0) but grows best on calcareous clays and thin soils over limestone. 3. Sorbus torminalis is a sexual, diploid, non-apomictic species that has hybridised with a number of other Sorbus species to form microspecies. The hermaphrodite flowers are primarily insect pollinated. Seed production is reliable only in warm years, especially at the edge of its range, although even then seed viability is low. The fruits are primarily dispersed by carnivorous mammals. Seeds display embryo dormancy but most will germinate the first spring after falling. 4. This tree is very tolerant of short droughts but only moderately tolerant of frost, hence its southerly and lowland distribution. It faces no particular individual threats although the small size of most populations makes it susceptible to habitat loss and fragmentation, particularly through the loss of open coppiced areas. As a consequence, it appears to be declining throughout Britain and Europe despite its wide range of historical uses and the high value of its timber. The extent to which these losses will be offset by increases due to climate change is unknown.Key-words: climatic limitation, communities, conservation, ecophysiology, geographical and altitudinal distribution, germination, herbivory, mycorrhiza, parasites and diseases, reproductive biology, soils Wild Service-tree or Chequers/Chequer tree. Rosaceae. Sorbus torminalis (L.) Crantz (Crataegus torminalis L., Pyrus torminalis (L.) Ehrh., Aria torminalis (L.) Beck., Torminaria clusii Roem., Torminalis clusii (Roem.) Roberts & Phipps) is usually a subordinate, subcanopy tree or shrub of temperate deciduous forests, and more rarely a co-dominant canopy tree reaching 30-33 m. Suckers profusely. Crown narrow when shaded but round, ...

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“…It is known that fruit and seeds are very useful in identification and classification of plant taxa (Karcz 1996;Liu and Lin 1999;Özcan 2004;Maciejewska-Rutkowska and Bednarz 2004;Fagúndez and Izco 2004). Description of achenes from taxa of P. collina group is limited to their length, shape and colour (Wolf 1908;Juzepczuk 1941;Kelley 1953;Szafer and Paw³owski 1955;Soják 1995).…”

Section: Introductionmentioning

confidence: 99%

Characteristics of achenes in Potentilla collina group (Rosaceae)

Kołodziejek

Gabara

2011

Acta Soc Bot Pol

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Achenes morphology in taxa from Potentilla collina s.l. i.e. P. collina Wibel s.s., P. leucopolitana P.J. Müller, P. thyrsiflora Hülsen ex Zimmet. P. thyrsiflora var. isosepala Th. W., P. silesiaca Uechtr. And P. wimanniana Günther & Schummel was examined with stereoscope and scanning electron microscopy. Achenes of these taxa varied slightly in shape, size and colour, while marked differences among them appeared in the surface sculpture and in the dimensions of aril, dorsal ridge and ribs. SEM analyses allowed to distinguish two distinct morphological types of achenes. Type I with ruminate sculpture and aggregates of some material, various in shape and size, at the surface of partly destroyed epidermal cells covering fruit wall in P. leucopolitana, P. wimanniana and P. thyrsiflora. Type II with ruminate-reticulate sculpture due to well preserved epidermal cells in P collina, P. silesiaca and P. thyrsiflora var. isosepala. The obtained results have supported B³ockis suggestion to treat P. thyrsiflora var. isosepala as a separate species named P. isosepala. However, similarities in the surface sculpture of achenes in some taxa of P. collina group did not facilitate their classification, therefore this feature may be a valuable taxonomical criterium only in combination with others.

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SEM and stereoscope microscope observations on the seeds of the Polish species of the genus Sorbus L. (Rosaceae)

Cited by 12 publications

References 2 publications

Taxonomic significance of cypsela morphology in tribe Cichoreae (Asteraceae) using light microscopy and scanning electron microscopy

Taxonomic significance of cypsela morphology in tribe Cichoreae (Asteraceae) using light microscopy and scanning electron microscopy

Biological Flora of the British Isles:Sorbus torminalis

Characteristics of achenes in Potentilla collina group (Rosaceae)

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