• Title/Summary/Keyword: horticultural plant

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Chemical Fungicides and Bacillus siamensis H30-3 against Fungal and Oomycete Pathogens Causing Soil-Borne Strawberry Diseases

  • Park, Bo Reen;Son, Hyun Jin;Park, Jong Hyeob;Kim, Eun Soo;Heo, Seong Jin;Youn, Hae Ree;Koo, Young Mo;Heo, A Yeong;Choi, Hyong Woo;Sang, Mee Kyung;Lee, Sang-Woo;Choi, Sung Hwan;Hong, Jeum Kyu
    • The Plant Pathology Journal
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    • v.37 no.1
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    • pp.79-85
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    • 2021

  • Chemical and biological agents were evaluated to inhibit Colletotrichum fructicola, Phytophthora cactorum, and Lasiodiplodia theobromae causing strawberry diseases. Mycelial growths of C. fructicola were gradually arrested by increasing concentrations of fungicides pyraclostrobin and iminoctadine tris (albesilate). P. cactorum and L. theobromae were more sensitive to pyraclostrobin compared to C. fructicola, but iminoctadine tris (albesilate) was not or less effective to limit P. cactorum or L. theobromae, respectively. Bacillus siamensis H30-3 was antagonistic against the three pathogens by diffusible as well as volatile molecules, and evidently reduced aerial mycelial formation of P. cactorum. B. siamensis H30-3 growth was declined by at least 0.025 mg/ml of pyraclostrobin. The two fungicides additively inhibited mycelial growths of C. fructicola, but not of P. cactorum and L. theobromae. B. siamensis H30-3 volatiles led to less growth of C. fructicola than one reduced by the fungicides. Taken together, in vitro antimicrobial activities of the two fungicides together with or without B. siamensis H30-3 volatiles may be cautiously incorporated into integrated management of strawberry diseases dependent on causal pathogens.

  • https://doi.org/10.5423/PPJ.NT.12.2020.0232 인용 PDF KSCI

Rapid Somatic Embryogenesis and Plant Regeneration in American Ginseng: Effete of Auxins and Explants

  • Wang X.;Proctor J.T.A.;KrishnaRaj S.;Saxena P.K.;Sullivan J.A.
    • Journal of Ginseng Research
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    • v.23 no.3 s.55
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    • pp.148-163
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    • 1999

  • The efficacy of three auxins, viz. 2,4-0, NAA and dicamba, were compared for the induction of somatic embryogenesis in American ginseng (Panax quinquefolium L.). Somatic embryos (SEs) formed on ginseng cotyledonary, zygotic embryo and shoot explants after 8 weeks of induction by the auxin stimuli. Significantly more somatic embryos were induced by culture of any of the ginseng explants on media supplemented with $5{\mu}M$ 2,4-0 than any other auxin treatment. Shoots derived from somatic embryos had the greatest regenerative potential and zygotic embryos the least. Explants generated from green (unstratified) seeds gave similar or higher frequency of embryogenesis as the explants derived from stratified seeds. Histological and SEM studies confirmed that the regenerimts were somatic embryos. Somatic embryos germinated and developed into normal plants in $3\~6$ months. About $10\%$ of plantlets from second generation SEs formed flowers within 10 weeks, particularly on media supplemented with $GA_3$ The development of a regeneration system for ginseng through somatic embryogenesis is a necessary first step for mass propagation and genetic improvement of American ginseng.

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