• Journal of Life Science
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• v.8 no.2
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• pp.131-136
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• 1998

Tje dispersion and adaptation of the recently immograted plant, prickly lettuce (Lactuca serriola), were studied. The distribution of prickly lettuce was limited to south of the central districts of the Korean peninsula. The distrbution range is being diffused contimnuously by manual transportation. The 10 selected sites showed typical road side vegetation of an early successional stage; tje quadrats had 90% herbaceous cover, 5% shrub cover, and no tree cover. Dominant species were Kummerowia stipulacea, Ixeris chinensis, Ambrosia artemisiifolia, Lactuca indica, Toungia sonchifolia, Cephalonoplos segetum, Rubus parvifolius, Izeris polycdphala, Hemistepta lyrata, Cercis chinensis Artemisia capillaris. The investigated sites were divided into 4 patterns based on vegetation with high dissimilarity. The presence of mant patterns, despite high livels of differences, indicated that the characteristic prickly lettuce communities were not yet formed.

• The Korean Journal of Mycology
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• v.51 no.3
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• pp.245-249
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• 2023

Prickly lettuce (Lactuca serriola), an invasive annual plant, poses a significant threat to the agricultural systems of many countries, including Korea. In 2020, leaf blight symptoms were observed in the prickly lettuce populations of various farms across Korea. Detailed morphological and molecular sequence analyses revealed that the disease was caused by the fungus, Curvularia intermedia. A pathogenicity test confirmed that the fungus can cause the same symptoms in healthy prickly lettuce, thereby fulfilling Koch's postulates. To the best of our knowledge, this is the first report of C. intermedia causing leaf blight on L. serriola in Korea, suggesting its potential as a biocontrol agent for this weed. However, further investigations are necessary to determine its ecological impact to prevent any non-target effects.

• Journal of Life Science
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• v.19 no.2
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• pp.206-212
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• 2009

The bio-active materials were isolated from prickly lettuce (Lactuca serriola) by using several extraction solvents. The contents of general compounds, vitamins, polyphenols and flavonoids of prickly lettuce were analysed. In addition, nitrite scavenging activity, anti-oxidative activity and anti-microbial activity of methanol extracts were measured. The ethylacetate (EtOAc) fraction of methanol extracts of prickly lettuce showed the best on the nitrite scavenging activity, anti-oxidant activity and anti-microbial activity. And also, the contents of polyphenols and flavonoids were the highest among all fractions. The subfraction 2 (EtOAc:MeOH=3:1) of EtOAc fraction showed the strongest anti-oxidative activity among 5 subfractions. The subfraction 2 was identified as ${\rho}$-coumaric acid and caffeic acid by GC-MS. The anti-microbial activity of each solvent fraction from prickly lettuce was measured. The EtOAc fraction showed the strongest anti-microbial activity. Overall, these results may provide the basic data to understand the biological activities of bio-active materials derived from prickly lettuce.

• Proceedings of the Korean Society of Life Science Conference
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• 2008.10a
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• pp.60.1-60.1
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• 2008

• The Korean Journal of Mycology
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• v.49 no.3
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• pp.379-383
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• 2021

Lactuca serriola L. (syn. L. scariola L.), commonly known as prickly lettuce, invaded Korea in the late 1970s. The plant has since become widely naturalized and disruptive to native plant communities. In May 2020, downy mildew infections were observed on L. serriola in Gimje-si, Korea. Molecular phylogenetic and morphological analyses identified the causal agent as Bremia lactucae. This is the first report of B. lactucae infection on L. serriola in Korea.

• Weed & Turfgrass Science
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• v.2 no.2
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• pp.138-151
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• 2013

This study was carried out to investigate the distribution and habitat types of prickly lettuce, Lactuca scariola of Europe origin for supplying the basic data of management plan. It showed fairly nation-wide distribution although excessive growth was rather limited in the wild. Its habitat types were divided into four types like open fields, roadsides, seashores and riversides. Species diversity examined by species rank-dominance curve tended to increase over riverside > seashores > open fields > roadsides. As a result of analyzing life form, therophytes were more than 50%, means that the habitats of L. scariola were disturbed by human activities etc. Urbanization Index was analyzed 9.1% in roadsides, 7.4% in seashores, 5.8% in open fields and riversides. It has high spread potential with a large number of wind-flying seed per plant. It was evaluated that prickly lettuce was mainly spread along the newly constructed road, expressway and invaded the original ecosystem in the cultivated land as weeds. But it has played a role as a pioneer species in open fields. It is recommended to remove where it has considerable impact on the native plant species of conservation value.

• Korean Journal of Environment and Ecology
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• v.36 no.1
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• pp.1-29
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• 2022

This study surveyed the Mt. Teomo·Hyeolgu and surrounding areas in Ganghwa Island, located in Ganghwa-gun, Incheon, to identify vascular flora and alien plants to be used as basic data for systematic management of the remarkable plants and biodiversity conservation. The survey was carried out 13 times from March 2019 to October 2020. The identified vascular flora of Mt.Teomo·Hyeolgu was 101 families, 321 genera, 517 species, 13 subspecies, 38 varieties, 5 forms, and 573 taxa. They accounted for about 12.35% of a total of 4,641 taxa of vascular plants in Korea. The identified Northern lineage plants, endemic plants, and rare plants on the Korean Peninsula as designated by IUCN were 68 taxa, 10 taxa, and 9 taxa, respectively. 69 taxa were classified as floristic target species. Three taxa, including Maui sedge [Carex thunbergii var. appendiculata (Trautv. & C.A.Mey.) Ohwi] were identified s Class IV and 14 taxa, including Violet Stanavoi clematis (Clematis fusca var. violacea Maxim.) were identified as Class III. The naturalized plants that appeared in the study site were 63 taxa, including daisy fleabane [Erigeron annuus(L.) Pers.], common ragweed [Ambrosia artemisiifoliaL.] and Canadian fleabane [Conyza canadensis(L.) Cronquist]. The above three species were found to have spread throughout Ganghwa Island and surrounding areas such as Seokmo Island, Gyodong Island, and Gimpo city. As introduced disturbing plants like prickly lettuce [Lactuca scariola L.], bur cucumber [Sicyos angulatus L.] and field dock [Rumex acetosella L.] have been newly reported in the Mt. Teomo·Hyeolgu area, mid- to long-term conservation measures should be established for native plants, such as remarkable plants, and also management measures like physical removal should be prepared at an early stage.