Pollen morphology of the Polish species of the genus Sorbus L.

Bednorz, Leszek; Maciejewska, Iwona; Wrońska‐Pilarek, Dorota; Fujiki, Toshiyuki

doi:10.5586/asbp.2005.040

Cited by 12 publications

(23 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A comparative study on pollen morphology of Prunoideae of China has been investigated by Zhou et al (1999). Several other researchers studied the pollen morphology of rosaceous members including Reitsma (1967), Ueda and Tomita (1989), Hebda and Chinnappa (1990a, b), Bednorz et al (2005) and Dönmez (2008). Present research is the first study on pollen grain morphology of Iranian species of Amygdalus.…”

Section: Introductionmentioning

confidence: 87%

Pollen morphology of Amygdalus L. (Rosaceae) in Iran

Vafadar

Attar

Maroofi³

et al. 2011

Acta Soc Bot Pol

View full text Add to dashboard Cite

INTRODUCTIONThe genus Amygdalus L. is one of the genera of tribe Amygdaleae, subfamily Spiraeoideae (formerly subfamily Prunoideae) in Rosaceae (Potter et al. 2007). This genus with approximately 40-45 species in the world is mainly distributed in SW Asia and C Asia but a few species are distributed in E Asia (China and Mongolia) and SE Europe (Browicz and Zohary 1996). The main phytogeographical region for Amygdalus distribution is Irano-Touranian region. According to Browicz (1969) (15 species and two hybrids) and the addition to this genus by Khatamsaz (1993) (21 species and six hybrids in which seven species, one variety and all six hybrids are endemic taxa for flora of Iran.), Iran is the main center for distribution of this genus and in fact, this is one of the most important elements of Elburz and Zagros mountains, steppes, mountains and semidesert localities in Iran. Amygdalus is one of the most problematic genera in family Rosaceae and taxonomy of this genus like many other genera in family Rosaceae such as: Crataegus L., Pyrus L., Cotoneaster Medik., Rosa L. and Rubus L. deals with numerous problems because of high degree of variation in morphological characters under different ecological conditions (Khatamsaz 1993). It shows high degree of variation within one species, high hybridization inter species and high homoplasy under ecological conditions. Because all former taxonomic classifications of Iranian species of Amygdalus were based on morphological characters soley and this examination in Amygdalus shows high variation and does not provide sufficient data for delimitation of species, so the boundaries between species in this genus are not clear. On the other hand, we need more data sources including molecular, biochemical and micromorphological data for taxonomical resolution and evaluation of relationships among species in this genus. Against morphological characters, micromorphological characters are more constant and provide efficient, reliable and detailed data for distinguishing taxonomic relation- ABSTRACT Pollen grain of 16 species and three hybrids of the genus Amygdalus L., representing two subgenera and two sections distributed in Iran were examined by light and scanning electron microscopy. All pollen grains are tricolporate. The shape of grains varies from subprolate through prolate. Regarding outline, in polar view, pollen grains are triangular-circular and in equatorial view, elliptic. Regarding sculpturing of exine, the frequent type like many members of family Rosaceae is striate with or without perforations that can be subdivided into three subtypes: type I (A-B), type II (A-B) and type V. In three species, A. trichamygdalus, A. spinosissima and A. orientalis, exine sculpture type is completely different. In the first species is rugulate, in the second species is reticulate and in A. orientalis, it is gemmate-perforate. Ornamentation of ridges (muri) in the striate sculpture is parallel to ectocolpus. Number of perforations in tectum, diameter of them, striae intervals and the thic...

show abstract

Section: Introductionmentioning

confidence: 87%

Pollen morphology of Amygdalus L. (Rosaceae) in Iran

Vafadar

Attar

Maroofi³

et al. 2011

Acta Soc Bot Pol

View full text Add to dashboard Cite

show abstract

“…Pollen grains are elliptic, 22–40 μm in diameter, 3(4)‐colporate, and of medium size compared to other species within the genus (Bednorz et al . ). Pollen viability is affected by both temperature and humidity (Termena ) and was found by Price & Rich () to vary around England between 50 and 100%, with a mean of 75%.…”

Section: Floral and Seed Charactersmentioning

confidence: 97%

Biological Flora of the British Isles:Sorbus torminalis

Thomas

2017

Journal of Ecology

View full text Add to dashboard Cite

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, ...

show abstract

“…They thought the pollen size to be the least reliable feature and they related it to the comparatively frequent occurrence of hybrid and polyploid species in this family. In the subgenera Sorbus, Chamaespilus and Torminaria belonging to the genus Sorbus, pollen morphology corresponds with their systematic classification [16], while in the genus Rosa, a recent study showed that the exine sculpture can be helpful in distinguishing groups of species although only slightly corroborates division of the genus in subgenera and sections [17].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the pollen morphology of traditional cultivars of Prunus species in Sicily

Geraci¹,

Polizzano²,

Marino³

et al. 2012

Acta Soc Bot Pol

View full text Add to dashboard Cite

In this study pollen grains of 13 cultivars and 3 rootstocks belonging to 5 species (P. armeniaca, P. domestica, P. dulcis, P. persica, P. avium) of the genus Prunus collected from North-East Sicily were examined for the micromorphological characterization through the scanning electron microscopy (SEM). The length of polar axis (P) and the equatorial diameter (E) of grain, P/E ratio, the length of colpi (C), diameter of perforations (DP) and the number of perforations in 25 µm 2 (PN), the width of muri (WM), the distance between muri (DM) and their number in 25 µm 2 (MN), the width of grooves (WG) were measured and their variation was compared among studied taxa. Moreover multivariate statistical analysis was carried out to distinguish morphometric information from measured parameters. All pollen grains are trizonocolpate, isopolar, medium-large sized and their shape varies from prolate to perprolate. Regarding outline pollen grains are subtriangular in polar view and elliptic in equatorial view. Exine sculpturing is striate with perforations on grain surface. The arrangement of ridges appears roughly parallel but too sloped (sometimes curved) compared to polar axis, or branched and oriented in different directions, or perfectly parallel or more irregular with bifurcated ridges often sinuous. The analyses showed a great variability (particularly in P. domestica cultivars) related in some cases to the diversity in the morphological features of the leaves and the fruits of the investigated entities. Keywords: pollen morphology, SEM, Sicilian Prunus, species, cultivarsActa Societatis Botanicorum Poloniae

show abstract

Pollen morphology of the Polish species of the genus Sorbus L.

Cited by 12 publications

References 5 publications

Pollen morphology of Amygdalus L. (Rosaceae) in Iran

Pollen morphology of Amygdalus L. (Rosaceae) in Iran

Biological Flora of the British Isles:Sorbus torminalis

Investigation on the pollen morphology of traditional cultivars of Prunus species in Sicily

Contact Info

Product

Resources

About