• 식물분류학회지
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• 제52권1호
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• pp.29-34
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• 2022

A palynological study of genus Dioscorea L. in Korea was conducted to evaluate the taxonomic implications. As a result of confirming the palynological characteristics of seven taxa of Dioscorea L., including six that are distributed in Korea and D. tokoro found in Japan, sections or species were classified according to the characteristics, such as the number of apertures, the polar end shape, and exine sculpturing. Specifically, the exine sculptures of D. coreana and D. tokoro, erroneously known to be distributed in Korea, are distinguished. The change in the number of apertures is closely associated with microsporogenesis, and it can be presumed that disulcate pollen might have been derived from monosulcate pollen in Dioscorea.

• Journal of Plant Biology
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• 제8권1_2호
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• pp.19-23
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• 1965

Interaction occuring among the different Ca concentrations, pH and temperatures in the promotive effect of Ca in pollen growth was studied by using pollen from Crinum asiaticum and Cryptostegia grandiflora. Data for pollen tube elongation were found to be more indicative of representing the promotive action of Ca ion in pollen growth than those for pollen germination, and were served to evaluate the experimental results. The pollen growth increased as the concentration of Ca increase. The optimal pH range for pollen growth shifted from the lower pH to the higher as the concentration of Ca increase. The characteristic Ca effect was disappeared, and no pH effect at various ranges was observed when pollen grains were grown at the low temperature(8$^{\circ}C$). The Ca effect became quite pronounced if temperature were raised. The Ca effect became even mroe striking if the condition was in higher pH ranges (weak alkaline). Higher pH ranges were found to be more favorable for the Ca action, whereas higher temperature was required to bring about more pronounced Ca effect. Thus, the longest pollen tube was obtained with the highest pH, temperature adopted for the medium supplemented with Ca in the present experiment, and the shortest tube with the lowest temperature applied at the highest pH. Pectin synthesis in pollen tube was considered as a metabolic process, whereas Ca binding in pectin of the pollen tube wall as non-metabolic in nature. Disappearance of Ca effect at the low temperature was probably brought about by blocking the metabolic synthesis of pectin, and nonmetabolic Ca binding seems to take place more extensively with higher concentrations of Ca and at higher pH levels than the lower.

• 한국자원식물학회지
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• 제3권2호
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• pp.123-128
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• 1990

In every reciprocal crosses of self pollination, interspecific pollination through ordinary stigma pollination of L. longiflorum and $L.{\;}{\times}{\;}elegans$, pollen vigorously germinated in stigma, and pollen tube was growing. But, 5 days after pollination, pollen tube stopping their growth in the same style as was observed in the cross of self pollination and interspecific pollination. Intrastylar pollination of $L.{\;}{\times}{\;}elegans$ and L. longiflorum passed stylar cannal through the basal part of styles. But, pollen tube that was growing to the ovule of the ovary was extremely small. In morphogical observation of ovary 10 days after pollination, it was observed, that every reciprocal crosses of L. longiflorum ${\times}$ L. ${\times}$ elegans was fertilized through intrastylar pollination, so that this technique was used to overcome cross incompatibilities.lities.

• Journal of Plant Biology
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• 제13권2호
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• pp.11-14
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• 1970

Identification and observations of leucine aminopeptidase (LAP) and multiple molecular forms of the enzyme, isozymes, were made with a technique of starch-gel electrophoresis for various legume pollen. Plants tested other than Leguminosae demonstrated either no indication of the presence or at least tract of enzymes and the isozymes, although all legume pollen tested showed strong LAP patterns. The electrophoretic patterns of LAP failed to be shown if the extracts were heated or otherwise denatured. Extent of zymogrammatic appearance of LAP and the isozymes were characteristic of a species.

• 식물분류학회지
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• 제37권2호
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• pp.87-108
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• 2007

콩과의 화분학적 자료를 제공하고 분류학적 연구에 기여하고자, 한국에서 생육하는 콩과 목본식물 12속 31분류군의 화분형태를 광학현미경과 주사형전자현미경으로 관찰하였다. 본 콩과의 화분립 형태는 단립이었으며, 적도면 입상은 약장구형 혹은 드물게 아장구형으로 나타났다. 화분립의 발아구는 적도면에서 일렬로 배열하는 삼공구형이거나 혹은 드물게, 한국에서 생육하는 콩목의 다른 과에서는 나타나지 않는, 삼복개형이었다. 본 과는 표면무늬에서 평활상, 미세공상, DMIP상, 세공상, 다각형 세공상, MAP상, MPG상, PMAP상, VPPS상, VP상, 과립상, 난선상, 망상, 세망상과 같은 다양성을 보여주었다. 화분학적 특징은 개느삼속이 고삼속으로 합병되어야 함을 지지하였고, 골담초속(Galegeae족)과 Sophoreae족 내 Sophora 그룹(Maackia, Sophora, Echinosophora)이 측정된 모든 특징과 표면무늬에서 서로 상당히 유사하였다. 발아구형, 화분립형태 그리고 표면무늬의 차이점에 근거하여 콩과의 11속이 인지되었고, 한국에서 생육하는 목본 콩과의 속수준의 화분검색표와 싸리속의 화분형검색표가 작성되었다. 조사된 Coronilla속과 등나무속 내 분류군들이 표면무늬에 의해 구별이 가능했다.

• Animal cells and systems
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• 제4권2호
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• pp.131-140
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• 2000

The pattern of variations in cone sex ratio and pollen traits such as pollen number and size was examined for two years in populations of red pines In Korea. We evaluated; (1) the relationship between tree size and cone sex ratio, (2) the relationship between year and cone sex ratio, and (3) the relationship between cone sex ratio and pollen traits. Larger trees in height and circumference at breast height produced more male as well as female cones. However, cone sex ratio was independent of these plant sizes. Across the two populations, both female cone numbers per tree and male cone numbers per new shoot increased 2.2 and 1.2 times, respectively, in 1999 compared to 1998, while the yearly pattern of male cone-bearing shoots per tree differed significantly between populations. Thus, cone sex ratio varied significantly between years in one of the two populations. Pollen traits such as the number of pollen grains and diameter did not vary significantly among populations. Pollen diameter and grain numbers per male cone were significantly negatively correlated with the cone sex ratio in two populations and one population, respectively. Trees which stopped female cone production in the first year and those which produced female cones in both years differed in the cone sex ratio and pollen size in the second year. The long duration of one reproductive episode and the potential of masting in red pines emphasize the need to conduct long-term studies on the dynamics of cone production, cone sex ratio, and simultaneous changes in pollen traits in red pines.

• Journal of Plant Biology
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• 제30권3호
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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.

• 생약학회지
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• 제14권3호
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• pp.83-91
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• 1983

The purpose of this study is concerned with identification of floral type of commercially available honeys and pollen loads. Ikuse's technique was applied to identify the pollen species of honey and pollen loads. Among six kinds of commercially available honeys in Taegu, Korea i.e. Robinia Honey, Brassica Honey, Castanea Honey, Rhododendron Honey, Lespedeza Honey and Multipant Honey, all honeys contained pollens, which were coincident with their trade names given by the apirists, except Lespedeza Honey. The trade name of imported honeys were not given by the plant, from which pollen material and nectar were collected. Among four kinds of these products, pollen was not identified in Clover Honey. A spectrum of honey products added by pollen loads was, of course, wider than simple honey products. The pollen load showed spectrum of pollens including not only those which are specialized for wind pollination, eq. Pinus species and Gramineae, but also contained for insect pollination, eq. rose and leguminous plants.

• 한국식품위생안전성학회지
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• 제6권1호
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• pp.41-48
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• 1991

Dissolution rate , periduium state, nutrient component and fatty acid composition of 5 species of natural pollen and 3 species of processed pollen were carried out for evaluation of quality. Natural pollens had average 11.5% of moistures, and had native peridium may be responsible for allergy. The average dissolution rate of natural pollens were low as 66.3%. One among 3 species of processed pollen was observed to have not peridium, resulted in higher dissolution rate. Major fatty acid of pollen was palmitic acid but content of oleic acid was lower than that of other plant seeds.

• 식물분류학회지
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• 제41권3호
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• pp.202-208
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• 2011

The present study was focused on the careful investigation of Glechoma longituba flowers collected from four populations in Korea to clarify their precise sexual systems. All floral characters of this taxon were examined by using a stereo microscopy. The nutlet size and production were compared between two distinct morphs (i.e., hermaphrodites and females), and pollen viability test of hermaphrodite and intermediate phenotype (i.e., individuals with a mixture of females and perfect flowers) was also observed by light microscopy (LM). All of the investigated floral characters of G. longituba are significantly different from one sexual morph to another. Hermaphroditic plants were larger than the female ones in corolla width and length, calyx length, filament length, anther length, and style length (all P < 0.0001, respectively). However, the nutlet width of the female plants was larger than those of the hermaphrodites (P = 0.013). Nutlet production of females was higher than hermaphrodites in Na-Ju population [H (Hermaphrodite): ca. 17.76%, F (Female): ca. 37.45%], but in Mun-San population was no significant difference between these sexual morphs (H: ca. 57.52%, F: ca. 53.16%). We have found significant differences between the fertile pollen grain of hermaphrodite and sterile pollen grain of intermediate phenotype based on pollen size and viability. The results of the present study suggest that compensation (flower size dimorphism, seed set, and pollen viability) is one of the main mechanisms in order to maintain female plants in gynodioecious G. longituba.