Fern constituents: pentacyclic triterpenoids isolated from Polypodium niponicum and P. formosanum

Ageta, Hiroyuki; Arai, Yôko

doi:10.1016/s0031-9422(00)80275-7

Cited by 96 publications

(33 citation statements)

References 11 publications

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“…Although this compound and its precursor have been identified in a variety of microorganisms, such as bacteria (Bird et al, 1971;De Rosa et al, 1971;Rohmer et al, 1984), cyanobacteria (Rohmer et al, 1984;Gelpi et al, 1970), and in ferns (Ageta et al, 1964;Ageta and Arai, 1983;Bottari et al, 1972), the most important source of diploptene in marine sediments is believed to be aerobic prokaryotes including cyanobacteria. A possibility of anaerobic bacteria as a source for diploptene is excluded because only aerobic bac teria or facultative aerobes as bacteria that gener ate hopanoids has been known solar (Ourisson et al, 1987).…”

Section: Introductionmentioning

confidence: 99%

.DELTA.13 records of diploptene in the Japan Sea sediments over the past 25 kyr.

et al. 1997

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Stable carbon isotopic compositions were determined for diploptene in the sediment core KH-79-3, L 3 (core length: 235 cm) taken from the Oki Ridge in the southern part of the Japan Sea. Two major groups of diploptene with different 813C values were recognized. The first group appears in the 0-130 cm section (present to 10 kyr B.P.) of the core, the 813C values being -25.0 ± 0.7%o on average. Diploptene in this section should have originated from cyanobacteria. The second group which is strongly depleted in 13C ( 53.1 ± 5.3%o on average), is observed in the 145-204 cm section (12-21 kyr B.P.). Diploptene in this section might have originated from methanotrophic bacteria. This indicates that an anoxic bottom water condition was developed during 12-21 kyr B.P. (the last glacial period), which was perhaps caused by the development of seawater stratification in the Japan Sea.

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Section: Introductionmentioning

confidence: 99%

.DELTA.13 records of diploptene in the Japan Sea sediments over the past 25 kyr.

et al. 1997

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“…In the all clay samples analyzed, fernenes, the natural product biomarkers first identified in ferns, were identified (Ageta and Arai 1983;Paull et al 1998;Marynowski et al 2007). Among the steroids, the diaster-13(17)-enes (20R and 20S epimers) and 4b-methyldiaster-13(17)-enes (20R and 20S epimers) are clearly dominant in all clays, while D4 and D5 sterenes, steranes and diasteranes are not found.…”

Section: Organic Geochemistrymentioning

confidence: 93%

Middle Jurassic (Bathonian) encrusted oncoids from the Polish Jura, southern Poland

Zatoń

Kremer

Marynowski

et al. 2011

Facies

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Oncoids from two localities (Ogrodzieniec and Blanowice) of the Polish Jura, southern Poland, have been investigated with respect to their genesis and paleoecology. These oncoids occur within Middle Jurassic (Bathonian) deposits. Those from Ogrodzieniec are large, elliptical, and embedded within a presumably condensed carbonate bed. Those from Blanowice, on the contrary, are significantly smaller, irregular to box-like in shape, and occur within the ore-bearing clays. The oncoids from both localities consist of a distinct carbonate core and laminated cortex that is significantly thicker and better preserved in the Ogrodzieniec oncoids. SEM and optical microscopic investigation of the oncoid cortices revealed the presence of carbonate and silicate layers with web-like structures similar to those occurring in recent cyanobacterial microbialites. Thus, the oncoid cortices investigated may have formed in a photic zone environment with the aid of coccoid and filamentous cyanobacteria. Oxic conditions prevailed during oncoid cortex formation within the siliciclastic setting, which is manifested by low total organic carbon content, high pristane/phytane (Pr/Ph) ratio, and significant predomination of the C 31 homohopanes. On the cortices' surfaces, as well as between particular laminae, various encrusting organisms have been found. The encrusters, dominated by serpulids and bryozoans, are cryptic species that inhabited the undersides and recesses of the oncoids. Their presence on both the upper and lower surfaces of the oncoids indicates that the oncoids were episodically overturned on the seafloor. The much better developed cortex lamination and much higher diversity and abundance of encrusters in the Ogrodzieniec oncoids may point to better trophic conditions prevailing in a shallower marine environment characterized by transparent waters, as opposed to a deeper siliciclastic environment with less transparent waters and probably worse trophic conditions prevailing during formation of the Blanowice oncoids.

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“…Multiflorenyl acetate was found in Cirsium sp. and Ixeris chinensis (Asteracae; Ulubelen and Berkan, 1977;Shiojima et al, 1994;Kataria, 1995;Jakupovic et al, 2011), as well as in Tabernaemontana longipes (Apocynaceae; Cicció-Alberti and Hoet, 1981), Euphorbia guyoniana (Euphorbiaceae; Haba et al, 2007), Sedum brevifolium and S. meyeri-johannis (Stevens et al, 1994a), and in Polypodium niponicum (Polypodiaceae; Ageta and Arai, 1983). -Amyrin acetate was described in 11 Asteraceae spp.…”

Section: Distribution Of Triterpenyl Acetates In Plantsmentioning

confidence: 99%

Occurrence of triterpenyl acetates in soil and their potential as chemotaxonomical markers of Asteraceae

Lavrieux

Jacob

Milbeau

et al. 2011

Organic Geochemistry

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As a part of a wider study aimed at determining new molecular biomarkers in soils and sediments that could be specific of distinct vegetation types with respect to unravelling past changes in land use, we analysed the neutral lipid content of soil developed in the catchment of a small lake in central France. The ketone/acetate lipid fraction of soil under pasture or meadow contains a series of pentacyclic triterpenyl acetates of wide structural diversity, most being reported in soil for the first time. The restricted number of potential plant sources of triterpenyl acetates (some produced by a single species) underlines the potential of triterpenyl acetates as new biomarkers to track past vegetation change in palaeoenvironmental studies, when found in natural archives such as soil, sediments or peat.

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Fern constituents: pentacyclic triterpenoids isolated from Polypodium niponicum and P. formosanum

Cited by 96 publications

References 11 publications

.DELTA.13 records of diploptene in the Japan Sea sediments over the past 25 kyr.

.DELTA.13 records of diploptene in the Japan Sea sediments over the past 25 kyr.

Middle Jurassic (Bathonian) encrusted oncoids from the Polish Jura, southern Poland

Occurrence of triterpenyl acetates in soil and their potential as chemotaxonomical markers of Asteraceae

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