• Parasites, Hosts and Diseases
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• v.57 no.6
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• pp.621-625
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• 2019

There is often the risk of confusing pollen grains with helminth eggs from archaeological sites. Thousands to millions of pollen grains can be recovered from archaeological burial sediments that represent past ritual, medication and environment. Some pollen grain types can be similar to parasite eggs. Such a confusion is represented by the diagnosis of enterobiasis in ancient Iran. The authors of this study confused a joint-pine (Ephedra spp.) pollen grain with a pinworm egg. This paper describes the specific Ephedra pollen morphology that can be confused with pinworm eggs.

• Applied Microscopy
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• v.38 no.4
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• pp.329-338
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• 2008

Pollen morphological studies using light and scanning electron microscopy were conducted to determined the sub-sectional boundary and species relationship of 12 species of subsect. Meleuphorbia and related taxa. Based on the sculpturing patterns of pollen grains and UPGMA tree from numerical analyses using 8 quantitative pollen characters 12 species were divided into two types: type I, having microperforate pollen grains in E. epicyparissias, E. inermis, E. pillansii, E. obesa, E. bubalina, E. meloformis, E. nesemanii, and E. jansenvillensis, and type II, having fossulate sculpturing pattern in E. longituberculosa, E. monteiri, E. caput-medusae and E. grantii. The resulting pollen data suggest that the subsect. Meleuphorbia should not be a natural group, but closely related to the species from subsect. Anthacantha and sect. Treisia and sect. Medusea. Thus, the pollen morphological data recommended to combine above taxa as a single taxonomic group.

• Korean Journal of Plant Resources
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• v.28 no.2
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• pp.235-242
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• 2015

Morphology and characteristics of floral organ in highbush blueberry cultivars were studied to select suitable cultivars of highbush blueberry for domestic cultivation. The stamen consists an anther and a tape-like hairy filament with well-developed trichomes. When the anther was opened, the wall of anther was not dehiscent, and pollen grains were discharged into two tubes. Pollen was mature tetrad type without being separated after meiosis (Late March). The number of pollen granules per anther was 400~1,300, the germination rate was higher in the cultivars having many pollen grains. Pistil was composed of five carpels and a shipper without separate part. The number of ovules per ovary was 39~67, therefore, the coefficient of ranged from 11.6 to 31.0%. The seed pod formation by combination of ‘Bluejay’ and ‘Sharpblue’ was higher in the cross-pollination than in the self-pollination.

• Journal of Plant Biology
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• v.30 no.3
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• pp.215-223
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• 1987

Pollen grains of six geners and six species from Korean Theaceae were observed with light and scanning electron microscopes. Pollen morphology divided the investigated species into the tricolporoidate Theoideae and the tricolporate Ternstroemiodideae. On the basis of surface sculpturing pattern, further palynological relationships and classificatin were understood. Some of the nomenclatural problems were discussed along with the palynological results.

• Korean Journal of Plant Taxonomy
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• v.53 no.1
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• pp.9-13
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• 2023

Menyanthes trifoliata L., a heterostyly plant, is an endangered species in Korea. Floral morphology has been published for M. trifoliata, but few works have concentrated on pollen dimorphism differences accompanied by floral dimorphism. Here, we conducted a comparative morphological study of two morphs to investigate a dimorphism system with Korean populations. Pollen morphological characteristics were observed with a light microscope and a scanning electron microscope. For the pin type, pollen size is 36.01 ± 2.01 ㎛, whereas for the thrum type it is 41.28 ± 2.58 ㎛ in terms of the equatorial diameter. The two morphs have a small apocolpium field at 5.62 ± 0.30 for the pin type and 6.24 ± 0.70 for the thrum type. The configuration of the aperture was tricolpate with a striate ridge in the two morphs. However, they have different pollen shapes and sizes, stigma shapes, and apocolpium sizes. M. trifoliata only has different pollen sizes and shapes between European populations and Korean populations. Nevertheless, Korean populations also show pollen dimorphism correlated with their floral dimorphism.

• Applied Microscopy
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• v.36 no.3
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• pp.195-208
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• 2006

Using light and scanning electron microscopy morphological studies of pollens were conducted to determine the sectional boundary and the relationships among eight species of section Zygophyllidium and its five related species of subg. Poinsettia. Pollen characters of 13 species were described, and their diagnostic keys were presented here. Based on the sculpturing patterns and the results of numerical analysis using 10 pollen characters 13 species were divided into four Pollen types: type I, having micro-reticulate shaped pollen (E. hexagona, E. lagunensis, E. hexagonoides and E. bilobata), type II, having reticulate shaped pollen (E. delicatula, E. extipulata, E. dentata, E. heterophylla, E. pulcherrima and E. cyathophora), type III, micro-reticulate shaped pollen with platten muri (E. lacera), and type IV, haying foveolate shaped pollen grains (E. chersonesa and E. eriantha). The results of pollen morphological studies suggest that the sect. Zygophyllidium should be delimited based on only four species, E. hexagona, E. lagunensis, E. hexagonoides and E. bilobata, E. delicatural and E. exstipulata of sect. Zygophyllidium must be transferred to subg. Poinsettia based on pollen morphology. E. eriantha and E. chersonesa having forveolate sculpturing pattern of pollen grains seem to be closely related with species from subg. Agaloma, and additional studies of these species are needed to determine the species relationships within Agaloma group.

• Applied Microscopy
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• v.43 no.2
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• pp.75-80
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• 2013

The morphological features of pollen grains collected from the broad-leaved and cylindrical-leaved Portulaca species of the Hawaiian Islands were investigated. The variation in size and surface pattern were examined using scanning electron microscopy and statistical analysis. Pollens of the Portulaca were apolar grains of monads exhibiting apertures, colpi, and relatively thin echini. Of particular interest was the differing size of pollen grains among the species studied. Pollens of the broad-leaved Portulaca were considerable in size with a length of about $73{\sim}86{\mu}m$, while the cylindrical-leaved Portulaca tended to have smaller pollen grains ranging from 50~65 in diameter. The smallest pollens were found in cultivar 2 having an average of $43{\mu}m$. The pollen was intectate, and the exine surface appeared granulous, having sculptured elements of spinules and puncta. Two types of puncta were discerned; one forming an operculum, and the other, a simple perforation. Numerous spinules and small puncta were found throughout the cylindrical-leaved Portulaca. In the present study, morphological features of pollen grains from ten Hawaiian Portulaca species, including endemic and unknown taxa, revealed the aforementioned pattern of variation. This paper aim to provide morphological information that could be of phylogenetic value within the Hawaiian Portulaca.

• Proceedings of the Zoological Society Korea Conference
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• 1994.10a
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• pp.86.1-86
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• 1994

No Abstract, See Full Text

• Korean Journal of Plant Taxonomy
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• v.45 no.4
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• pp.323-331
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• 2015

Pollen morphological characteristics of 7 taxa of the genus Aruncus L. (Rosaceae) were examined using scanning electron microscopy (SEM) to evaluate the taxonomic implication within the genus. Aruncus pollen grains were monad, tri-colporate with granular membranes, small in size ($P=8.33-12.57{\mu}m$, $E=8.93-14.40{\mu}m$), amb is sub-circular to circular, suboblate to prolate-spheroidal in shape (P/E = 0.68-1.70). The sexine ornamentation in all studied taxa was basically striate but existence of perforation (striate-perforate: A. dioicus, A. dioicus var. acuminatus, A. dioicus var. astilboides, A. dioicus var. pubescens, A. dioicus var. vulgaris; striate-pstilate: A. dioicus var. aethusifolius, A. gombalanus) and the widths of muri and grooves varied according to the taxa. In particular, relatively short, and sharply crested muri being a distinct feature of A. dioicus var. acuminatus. As a result, the various combination of each pollen characteristics could be useful to identify the some taxa of the genus Aruncus.

• Applied Microscopy
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• v.32 no.4
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• pp.345-360
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• 2002

Pollen morphology of four genera, 22 species of Korean Crassulaceae has been examined with light and scanning electron microscopy. The presence/absence of the aperture margo and granules was useful characters to clarify the generic boundaries, and the shapes of the streate were significant to delineate taxonomic relationships within the genus Sedum. The pollen grains of Korean Crassulaceae were small and medium in size. Hylotelephium viviparum has the smallest pollen grains, and H. viridescens the largest. The pollen grains are tricolporate, circular in polar view and were prolate to prolate-spheroidal in equatorial shape. Korean Crassulaceae species have striate grains. The close pollen morphological relationships among Hylotelephium, Meterostachys and Orostachys species were concordant to the results based on the previous molecular and morphological studies. The results of the clustering analysis using pollen characters support the segregation of Sedum sensu lato which has been proposed by the previous authors. Within the genus Sedum, S. kamtschatium is closely related to S. middendorffianum with granules on the surface of the pollen grains. Sedum polytrichoides, a member of the Sedum, was clustered to the species of the Meterostachys, Hylotelephium and Orostachys, and needs to reexamine the taxonomic status. O. malacophyllus collected at Chungdong-Jin was significantly differ from the same species from Gampo in pollen and morphological characters.