Hye-Kyoung Moon

Micromorphology and Character Evolution of Nutlets in Tribe Mentheae (Nepetoideae, Lamiaceae)

Abstract Mentheae is an economically important tribe in Lamiaceae with many ornamentals and culinary herbs. Although its monophyly is well supported by molecular data, the subtribal delimitation and the intergeneric relationships are still poorly understood. The nutlet morphology (SEM) of the tribe and the presence/absence of myxocarpy is documented here for 57 out of 65 genera in order to assess the systematic value of nutlet characters and to evaluate the existing molecular phylogenies for this group. Significant variation was found in nutlet shape, morphology of the abscission scar, distribution of trichomes, and surface sculpture. Five different surface types were recognized in Mentheae based on differences in cell outline, anticlinal walls, cell boundary relief, and curvature of the outer periclinal wall. Representative nutlet features proved to be phylogenetically informative in Mentheae mainly at the generic level. Cladistic analyses were performed based on 15 morphological nutlet characters and/or available molecular data (nuclear ribosomal ITS and chloroplast trnL-trnF spacer sequences). The resulting topologies indicate that the addition of nutlet characters to the DNA-data matrix improved the overall resolution and also increased bootstrap support values in comparison with exclusively molecular phylogenetic analyses. The evolution of major nutlet characters within the tribe Mentheae is discussed.

Gynodioecy in Lycopus maackianus Makino (Lamiaceae) in Korea: floral dimorphism and nutlet production

Summary The sexual system of Lycopus maackianus Makino (Lamiaceae), a perennial herb, has never been investigated in depth before. The present study is focusing on the careful investigation of L. maackianus flowers collected from a natural population in Korea to clarify their precise sexual system. The results confirm that L. maackianus is clearly a gynodioecious plant. It appears that the hermaphrodite individuals of L. maackianus are protandrous. On average, females produced more than 37 times as many nutlets as did hermaphrodites. In L. maackianus , all investigated floral characters (e.g., corolla, calyx, filament, anther, style, stigma, nutlet) are significantly different between the two morphs. Hermaphroditic plants are larger than the female ones in corolla length ( P P = 0.006), filament length ( P P P P P

Morphological characteristics of major airborne pollen in Korea peninsula

【Although airborne pollen is invisible to the eye, it has been known as a major source to respiratory allergic reactions. For this reason, airborne pollen is monitoring in many countries to predict pollen concentration based on locality and season. However, the morphological characteristics of airborne pollen and their potential tendency as an allergen are still obscure. In the present study, we selected 52 airborne pollen samples based on previously reported data and investigated their detail pollen characteristics using LM and SEM. Major airborne pollen in Korea has sorted in 19 families (most angiosperms except four gymnosperm families), and all pollen grains are small to medium in size (

Pollen morphology of the genus Lycopus (Lamiaceae)

P=17.34-49.86{\mu}m

Phylogeny of tribe Mentheae (Lamiaceae): The story of molecules and micromorphological characters

) apart from the bisaccate pollen grains of Pinaceae (

Pollen morphology of the tribe Sorbarieae (Rosaceae)

P=46.49-106.20{\mu}m

Sex expression, population structure, and floral dimorphism in a gynodioecious herb, Agastache rugosa (Lamiaceae) in Korea

). The aperture number and shape vary from sulcate to polyporate. While the inaperture pollen has found only in gymnosperm (Cupressaceae and Taxaceae), triporate or polyporate is common pollen type in angiosperm. The sexine ornamentations could divide into several types, but the most sculpturing types are inconspicuous like psilate, rugulate and granulate. Reticulate pollen grains as a semitectum have occurred the species of genera Platanus and Fraxinus only. To estimate the possible relationships between pollen features and allergen, the results are discussed in botanical context.】