Pallidopenillines: Polyketides from the Alga-Derived Fungus Penicillium thomii Maire KMM 4675 as Stimulators of the Initial Stages of Crop Plant Development

The pallidopenilline A (I), 1-acetylpallidopenilline A (II), 1-deacetylpallidopenilline B (III) and pallidopenilline C (IV) isolated from marine fungus Penicillium thomi Maire KMM 467 5 were examined for their ability to stimulate growth of seedling roots of buckwheat ( Fagopyrum esculentum Moench), soy { Glycine max (L.) Merr.}, barley ( Hordeum vulgare) and wheat ( Triticum aestivum L.). The stimulatory effects depend on the chemical structure of the compounds and on the plant species. Compound I was efficient for growth of seedling roots of soy, barley and wheat. Compound II and III were efficient for growth of seedling roots of soy and barley. Compound IV was efficient for growth of seedling roots of buckwheat. These compounds can be recommended for field study as plant growth stimulators.

Influence of the Metabolites of the Marine Algicolous Fungus Penicillium sp. on Seedling Root Growth of Agricultural Plants

N-Methylpretrichodermamide B (I), pretrichodermamide C (II), quinolactacide (III) and 8-methoxy-3,5-dimethyl-3,4-dihydro-1H-isochromen-6-ol (IV), isolated from the marine fungus Penicillium sp., were examined for their ability to stimulate growth of seedling roots of buckwheat ( Fagopyrum esculentum Moench), wheat ( Triticum aestivum L.), soy { Glycine max (L.) Merr.}, and barley ( Hordeum vulgare). It was shown that the stimulatory effects depend on the chemical structure of the compounds and on the plant species. Compounds I and III improved the rate of growth of seedling roots of buckwheat (1) and wheat (2), compound II stimulated growth of buckwheat roots (1), and compound IV improved growth of seedling roots of wheat (2) and soy (3). These compounds can be recommended for field study as plant growth stimulators.