Pollen grain morphology supports the taxonomical discrimination of Mediterranean oaks (Quercus, Fagaceae)

Colombo, P. Mariani; Lorenzoni, Filippo; Grigoletto, Francesco

doi:10.1007/bf00989007

Cited by 31 publications

(21 citation statements)

References 4 publications

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“…Dissimilarity of Q . pubescens exine ornamentation compared to all studied Quercus taxa is also corroborated by Benthem et al [36], Colombo et al [17] and Smit [44]. The results of the present study agree with Benthem et al [36] as well as Hesse et al [72] that colpate or colporoidate pollen grains occurred in the investigated Quercus taxa.…”

Section: Discussionsupporting

confidence: 92%

“…The number of perforations differs, depending on authors; some report their total absence or only a few and others mention many with differing diameters and distributions on pollen grains [17, 36, 43, 47, 48, 91]. Results of this study corroborate the above observations; perforations were small, scarce or numerous, sometimes they could not be seen at all.…”

Section: Discussionsupporting

confidence: 82%

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Comparative Pollen Morphological Analysis and Its Systematic Implications on Three European Oak (Quercus L., Fagaceae) Species and Their Spontaneous Hybrids

et al. 2016

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Pollen morphology of three parental Quercus species (Q. robur L., Q. petraea (Matt) Liebl, Q. pubescens Willd.) and two spontaneous hybrids of these species (Q. ×calvescens Vuk. = Q. petraea × Q. pubescens and Q. ×rosacea Bechst. = Q. robur × Q. petraea) was investigated in this study. The pollen originated from 18 natural oak sites and 67 individuals (oak trees). Each individual was represented by 30 pollen grains. In total, 2010 pollen grains were measured. They were analysed for nine quantitative and four qualitative features. Pollen size and shape were important features to diagnosing Quercus parental species and hybrids. On the basis of exine ornamentation, it was possible to identify only Q. pubescens, while the remaining species and hybrids did not differ significantly with respect to this feature. The determination of the diagnostic value of endoaperture features requires further palynological studies. On the basis of pollen size and shape Q. robur × Q. petraea was clearly separated. Grouping of 67 oak trees on the basis of pollen grain features has shown that individuals from different as well as same taxa occurred in the same groups. Likewise, with respect to natural sites, oak trees originating from the same places as well as from geographically distant ones, grouped together. Pollen morphological features allow to distinguish a part of the studied Quercus taxa. Therefore, it can be used as an auxiliary feature in the taxonomy.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 82%

Comparative Pollen Morphological Analysis and Its Systematic Implications on Three European Oak (Quercus L., Fagaceae) Species and Their Spontaneous Hybrids

et al. 2016

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“…[4,8,[22][23][24]). Conforming to the results of previous studies all species studied here have pollen grains, which are single, isopolar, radially symmetrical, tricolpate, tricolporoidate or tricolporate.…”

Section: Discussionmentioning

confidence: 99%

“…Genus Quercus has a problematic taxonomy [5] because of its immense size and wide distribution [6], heterophylly, widespread hybridization between the infrageneric taxa and changes in morphological features (e.g. [7,8]). Most of the information about the classification of Quercus has come from taxonomic studies where the emphasis is on foliar and fruit characteristics.…”

Section: Introductionmentioning

confidence: 99%

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Pollen morphology of Quercus (subgenus Quercus, section Quercus) in Iran and its systematic implication

et al. 2012

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For the first time, pollen morphology of 9 (4 spp. and 5 subspp.) taxa representing lobed leaved oaks of Iran in the family of Fagaceae has been examined and illustrated using light microscopy and scanning electron microscopy of acetolysed material. Detailed pollen morphological characteristics are given for Quercus section. The pollen grains are single, isopolar, radially symmetrical, tricolpate, tricolporoidate or tricolporate. Pollens were studied to show all possible characteristics like shape, size, apertures, wall thickness, etc., with special reference to the specific features of each pollen type such as structural, sculptural and suprasculptural patterns. There is considerable variation in pollen morphology between taxa so that, three types of pollen shape, five types of structural pattern, two types of sculptural pattern, five types of suprasculptural pattern and three types of perfora distribution are defined. Furthermore, the relationship between pollen morphology and taxonomy is discussed. Overall, pollen characters are shown to be a useful and informative tool for assessing taxonomic position within Quercus section in Iran.

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Vegetation history of the penultimate glacial period (Marine isotope stage 6) at Ioannina, north‐west Greece

Roucoux

Tzedakis

Lawson

et al. 2011

J Quaternary Science

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The vegetational history of the penultimate glacial period, Marine Isotope Stage (MIS) 6 (c. 185-135 ka), has remained relatively unexplored. Here we present a new record from the Ioannina basin, north-west Greece, which constitutes the highestresolution terrestrial pollen record for this interval produced to date. It shows that the vegetation history of MIS 6 in this region can be divided into two parts: an early period (185-155 ka) with pronounced oscillations in tree population extent, and a later period (155-135 ka) with much smaller tree populations and subdued oscillations. This pattern is analogous to the MIS 3/MIS 2 division during the last glacial in the same sequence, although the early part of MIS 6 had larger Pinus populations and fewer temperate trees relative to the equivalent interval in MIS 3. This implies cooler and wetter conditions, which is somewhat counterintuitive given the high summer insolation during MIS 6e, but is in line with other palaeoclimatic evidence from the Mediterranean. Comparison with North Atlantic records suggests that despite the absence of pronounced iceberg discharges during MIS 6, North Atlantic millennial-scale variability had a significant downstream impact on tree populations in north-west Greece.

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Pollen grain morphology supports the taxonomical discrimination of Mediterranean oaks (Quercus, Fagaceae)

Cited by 31 publications

References 4 publications

Comparative Pollen Morphological Analysis and Its Systematic Implications on Three European Oak (Quercus L., Fagaceae) Species and Their Spontaneous Hybrids

Comparative Pollen Morphological Analysis and Its Systematic Implications on Three European Oak (Quercus L., Fagaceae) Species and Their Spontaneous Hybrids

Pollen morphology of Quercus (subgenus Quercus, section Quercus) in Iran and its systematic implication

Vegetation history of the penultimate glacial period (Marine isotope stage 6) at Ioannina, north‐west Greece

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