• Title/Summary/Keyword: chemical plant

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In Vivo Antifungal Activities of 67 Plant Fruit Extracts Against Six Plant Pathogenic Fungi

  • Choi Gyung-Ja;Kim Jin-Cheol;Jang Kyoung-Soo;Lim He-Kyoung;Park Il-Kwon;Shin Sang-Chul;Cho Kwang-Yun
    • Journal of Microbiology and Biotechnology
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    • v.16 no.3
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    • pp.491-495
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    • 2006
  • Methanol extracts of fruits of 67 plants were screened for in vivo antifungal activity against Magnaporthe grisea, Corticium sasaki, Botrytis cinerea, Phytophthora infestans, Puccinia recondita, and Blumeria graminis f. sp. hordei. Among them, 13 plant extracts ($3,000\;{\mu}g/ml$) showed more than 90% disease-control efficacy against at least one of six plant diseases. Specifically, the extracts of Aleurites fordii, Angelica dahurica, Camellia japonica, Chamaecyparis pisifera, Pittosporum tobira, and Styrax japonica controlled more than 90% of the development of rice blast at $1,000{\mu}g/ml$. Extracts of both S. japonica and A. dahurica fruits at $333{\mu}g/ml$ concentration displayed strong antifungal activity against M. grisea on rice seedlings.

Anti-oomycete Activity of Furanocoumarins from Seeds of Psoralea corylifolia against Phytophthora infestans

  • Shim, Sang-Hee;Kim, Jin-Cheol;Jang, Kyoung-Soo;Choi, Gyung-Ja
    • The Plant Pathology Journal
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    • v.25 no.1
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    • pp.103-107
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    • 2009
  • In the course of a searching natural antifungal compounds from plant seeds, we found that the methanol extract of Psoralea corylifolia seeds showed potent control efficacy against tomato late blight caused by Phytophthora infestans and wheat leaf rust Puccinia recondita. Under bioassay-guided purification, we isolated two furanocoumarins, psoralen and isopsoralen, with anti-oomycete activity against P. infestans. By 1-day protective application, both compounds strongly reduced the disease development of P. infestans on tomato seedlings, but hardly controlled development of leaf rust on wheat seedlings. This is the first report on the anti-oomycete activity of P. corylifolia as well as that of psoralen and isopsoralen.

Ethnopharmacology, bioactivities and chemical constituents of some anti-cancer plants in Malaysia

  • Chooi, Ong-Hean
    • Proceedings of the Plant Resources Society of Korea Conference
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    • 1999.10a
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    • pp.90-109
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    • 1999
  • Many plant species are used in Malaysia in folk medicine for the treatment of cancer. This paper presents some of these species with details on other ethnopharmacological uses, the known bioactivities and some chemical constituents of each of the species given. It is normal practice in traditional medicine that one species of plant is used to treat various ailments. Thus the plant species listed are all used to treat cancer but have various other ethnophrmacological uses as well, some with few other uses and rest with many other uses. Information on bioactivities of each species resulting from tests on human and experimental animals are also given. Proven bioactivities give strength to ethnopharmacological claims on the efficacies of plant resources in the treatment of cancer and various other ailments but will but will not necessarily lead to the production of new pharmaceutical drugs. Many of the known chemical constituents of each species are given. This shows the richness and variety of chemicals containes in each of the species listed, The chemicals listed may or may not prove to be important in the pharmaceutical sciences but is an indication of what each species contatin in thrms of plant chemicals, It is a well known fact that many of the pharmaceutical prescriptions in present day use are of plant origin and semi-synthetic or fully synthetic chemicals produced using knowledge gained from studies of phytochemicals. Thus the paper presented will give useful information and also shows the richness of plant species that have high potentials for the development of anti-cancer resources from plants in Malaysia.

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Fusarium Blight of Zoysia Grass

  • Park, Gyung-Ja;Son, Mi-Jeong;Kim, Heung-Tae;Kim, Jin-Cheol;Cho, Kwang-Yun
    • Proceedings of the Korean Society of Plant Pathology Conference
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    • 2000.10a
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    • pp.20.2-20
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    • 2000
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