Date: 26 November 2013
Secondary metabolites, structure diagram: Trivial name – Orlandin
Copyright: n/a
Notes:
Species: A. nigerSystematic name: [8,8′-Bi-2H-1-benzopyran]-2,2′-dione, 7,7′-dihydroxy-4,4′-dimethoxy-5,5′-dimethyl-Molecular formulae: C22H18O8Molecular weight: 410Chemical abstracts number: 69975-77-5Selected references: Orlandin: a nontoxic fungal metabolite with plant growth inhibiting properties. Cutler, Horace G.; Crumley, Farrist G.; Cox, Richard H.; Hernandez, Oscar; Cole, Richard J.; Dorner, Joe W. Georgia Coastal Plain Exp. Stn., Sci. Educ. Adm., Tifton, GA, USA. Journal of Agricultural and Food Chemistry (1979), 27(3), 592-5.
Images library
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Pigmentation of Aspergillus versicolor colonies ranged from pale green to greenish-beige, pink-green, dark green and brown. Reverse is usually reddish. The growth rate is usually slow. Cultured on Sabouraud dextrose agar with chloramphenicol.
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A Colonies on MEA after one week; B, C conidial heads with tip of conidiophire, x920; D conidial head, x 2330; E conidial heads x920
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A Colonies on MEA + 20% sucrose after one week; B detail of colony showing columnar conidial heads x 44 ; C conidial heads x 920; D conidia x2330
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Cultures are grown on malt extract agar for 5-7 days at 30°C.
Light microscopy-1000x stained with lacto-phenol and cotton blue.
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A Colonies on MEA +20% sucrose after one week; B ascomata x 40; C conidiophores x 920; D ascospores x2330; E ascoma x 230; F portion of ascoma with asci and ascospores, x 920.
