AustralieFrV1, PascalFrancis, Corpus, bibRecord, 005A41

Factors influencing the distributions of polyunsaturated terpenoids in the diatom, Rhizosolenia setigera

Identifieur interne : 005A41 ( PascalFrancis/Corpus ); précédent : 005A40; suivant : 005A42

Factors influencing the distributions of polyunsaturated terpenoids in the diatom, Rhizosolenia setigera

Auteurs : S. J. Rowland ; W. G. Allard ; S. T. Belt ; G. Masse ; J.-M. Robert ; S. Blackburn ; D. Frampton ; A. T. Revill ; J. K. Volkman

Source :

Phytochemistry [ 0031-9422 ] ; 2001.

RBID : Pascal:02-0009968

Descripteurs français

Pascal (Inist)
- Composé ramifié, Terpénoïde, Isoprénoïde, Hydrocarbure, Distribution, Température, Salinité, Croissance, Composition isotopique, Rhizosolenia setigera, Carbone 13.

English descriptors

KwdEn :
- Branched compound, Distribution, Growth, Hydrocarbon, Isoprenoid, Isotopic composition, Salinity, Temperature, Terpenoid.

Abstract

Polyunsaturated highly branched isoprenoid (HBI) hydrocarbon distributions of laboratory cultures of five strains of the planktonic diatom Rhizosolenia setigera (Brightwell) are shown herein to be highly variable. Some strains produced both haslenes with from three to five double bonds and rhizenes. The haslenes comprised not only Δ5 alkenes but also those with C7(20) unsaturation, including hasla-7(20),9E,Z, 23-trienes and hasla-7(20),9E,Z-13, 23-tetraenes. The rhizenes contained C7(25) unsaturation and the vinyl moiety common to all algal haslenes so far characterised. The effects of temperature and salinity on HBI composition, along with isotopic content, were determined in strain CS 389/A, Increase in growth temperature from 18 to 25 °C increased the degree of unsaturation in the haslenes and E to Z isomerisation in the triene. There was also an increase in unsaturation in the rhizenes at the highest growth temperature, with hexaenes dominant over the pentaenes but in the rhizenes, Z to E isomerisation increased. Increased salinity from 15 to 35 psu increased cell growth and rhizene production but decreased haslene production. Unsaturation in haslenes was not changed by increased salinity but unsaturation in the rhizenes decreased. These may reflect growth rate differences. The carbon isotopic compositions of the haslenes and rhizenes were similar to that of the major sterol at 18 C, but the major HBI isomers were 3-4 per mil depleted relative to phytol released by saponification from chlorophyll a. This suggests biosynthesis of HBIs from a different isotopic pool of isopentenyl biphosphate to that from which phytol is biosynthesised. At 25 C, further isotopic differences were observed. The variables controlling HBI distributions in R. setigera are still not fully understood and rationalisation of the environmental controls on the sedimentary distributions of the HBIs from R. setigera may only be possible once such factors are established.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

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Format Inist (serveur)

NO :	PASCAL 02-0009968 INIST
ET :	Factors influencing the distributions of polyunsaturated terpenoids in the diatom, Rhizosolenia setigera
AU :	ROWLAND (S. J.); ALLARD (W. G.); BELT (S. T.); MASSE (G.); ROBERT (J.-M.); BLACKBURN (S.); FRAMPTON (D.); REVILL (A. T.); VOLKMAN (J. K.)
AF :	Petroleum and Environmental Geochemistry Group, Department of Environmental Sciences, Plymouth Environmental Research Centre University of Plymouth, Drake Circus/Plymouth PL4 8AA/Royaume-Uni (1 aut., 2 aut., 3 aut., 4 aut.); ISOMer, Facultè des Sciences et des Techniques, Université de Nantes, 2 rue de la Houssinière/44027 Nantes/France (4 aut., 5 aut.); CSIRO Division of Marine Research, Castray Esplanade/Hobart, Tasmania/Australie (6 aut., 7 aut., 8 aut., 9 aut.)
DT :	Publication en série; Niveau analytique
SO :	Phytochemistry; ISSN 0031-9422; Etats-Unis; Da. 2001; Vol. 58; No. 5; Pp. 717-728; Bibl. 21 ref.
LA :	Anglais
EA :	Polyunsaturated highly branched isoprenoid (HBI) hydrocarbon distributions of laboratory cultures of five strains of the planktonic diatom Rhizosolenia setigera (Brightwell) are shown herein to be highly variable. Some strains produced both haslenes with from three to five double bonds and rhizenes. The haslenes comprised not only Δ5 alkenes but also those with C7(20) unsaturation, including hasla-7(20),9E,Z, 23-trienes and hasla-7(20),9E,Z-13, 23-tetraenes. The rhizenes contained C7(25) unsaturation and the vinyl moiety common to all algal haslenes so far characterised. The effects of temperature and salinity on HBI composition, along with isotopic content, were determined in strain CS 389/A, Increase in growth temperature from 18 to 25 °C increased the degree of unsaturation in the haslenes and E to Z isomerisation in the triene. There was also an increase in unsaturation in the rhizenes at the highest growth temperature, with hexaenes dominant over the pentaenes but in the rhizenes, Z to E isomerisation increased. Increased salinity from 15 to 35 psu increased cell growth and rhizene production but decreased haslene production. Unsaturation in haslenes was not changed by increased salinity but unsaturation in the rhizenes decreased. These may reflect growth rate differences. The carbon isotopic compositions of the haslenes and rhizenes were similar to that of the major sterol at 18 C, but the major HBI isomers were 3-4 per mil depleted relative to phytol released by saponification from chlorophyll a. This suggests biosynthesis of HBIs from a different isotopic pool of isopentenyl biphosphate to that from which phytol is biosynthesised. At 25 C, further isotopic differences were observed. The variables controlling HBI distributions in R. setigera are still not fully understood and rationalisation of the environmental controls on the sedimentary distributions of the HBIs from R. setigera may only be possible once such factors are established.
CC :	002A14B02B
FD :	Composé ramifié; Terpénoïde; Isoprénoïde; Hydrocarbure; Distribution; Température; Salinité; Croissance; Composition isotopique; Rhizosolenia setigera; Carbone 13
FG :	Phytoplancton; Bacillariophyta; Heterokontophyta; Algae; Thallophyta; Carbone Isotope
ED :	Branched compound; Terpenoid; Isoprenoid; Hydrocarbon; Distribution; Temperature; Salinity; Growth; Isotopic composition
EG :	Phytoplankton; Bacillariophyta; Heterokontophyta; Algae; Thallophyta; Carbon Isotopes
SD :	Compuesto ramificado; Terpenoide; Isoprenoide; Hidrocarburo; Distribución; Temperatura; Salinidad; Crecimiento; Composición isotópica
LO :	INIST-9408.354000102893050090
ID :	02-0009968

Links to Exploration step

Pascal:02-0009968

Le document en format XML

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<author><name sortKey="Volkman, J K" sort="Volkman, J K" uniqKey="Volkman J" first="J. K." last="Volkman">J. K. Volkman</name>
<affiliation><inist:fA14 i1="03"><s1>CSIRO Division of Marine Research, Castray Esplanade</s1>
<s2>Hobart, Tasmania</s2>
<s3>AUS</s3>
<sZ>6 aut.</sZ>
<sZ>7 aut.</sZ>
<sZ>8 aut.</sZ>
<sZ>9 aut.</sZ>
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<series><title level="j" type="main">Phytochemistry</title>
<title level="j" type="abbreviated">Phytochemistry</title>
<idno type="ISSN">0031-9422</idno>
<imprint><date when="2001">2001</date>
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<seriesStmt><title level="j" type="main">Phytochemistry</title>
<title level="j" type="abbreviated">Phytochemistry</title>
<idno type="ISSN">0031-9422</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Branched compound</term>
<term>Distribution</term>
<term>Growth</term>
<term>Hydrocarbon</term>
<term>Isoprenoid</term>
<term>Isotopic composition</term>
<term>Salinity</term>
<term>Temperature</term>
<term>Terpenoid</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Composé ramifié</term>
<term>Terpénoïde</term>
<term>Isoprénoïde</term>
<term>Hydrocarbure</term>
<term>Distribution</term>
<term>Température</term>
<term>Salinité</term>
<term>Croissance</term>
<term>Composition isotopique</term>
<term>Rhizosolenia setigera</term>
<term>Carbone 13</term>
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<front><div type="abstract" xml:lang="en">Polyunsaturated highly branched isoprenoid (HBI) hydrocarbon distributions of laboratory cultures of five strains of the planktonic diatom Rhizosolenia setigera (Brightwell) are shown herein to be highly variable. Some strains produced both haslenes with from three to five double bonds and rhizenes. The haslenes comprised not only Δ5 alkenes but also those with C7(20) unsaturation, including hasla-7(20),9E,Z, 23-trienes and hasla-7(20),9E,Z-13, 23-tetraenes. The rhizenes contained C7(25) unsaturation and the vinyl moiety common to all algal haslenes so far characterised. The effects of temperature and salinity on HBI composition, along with isotopic content, were determined in strain CS 389/A, Increase in growth temperature from 18 to 25 °C increased the degree of unsaturation in the haslenes and E to Z isomerisation in the triene. There was also an increase in unsaturation in the rhizenes at the highest growth temperature, with hexaenes dominant over the pentaenes but in the rhizenes, Z to E isomerisation increased. Increased salinity from 15 to 35 psu increased cell growth and rhizene production but decreased haslene production. Unsaturation in haslenes was not changed by increased salinity but unsaturation in the rhizenes decreased. These may reflect growth rate differences. The carbon isotopic compositions of the haslenes and rhizenes were similar to that of the major sterol at 18 C, but the major HBI isomers were 3-4 per mil depleted relative to phytol released by saponification from chlorophyll a. This suggests biosynthesis of HBIs from a different isotopic pool of isopentenyl biphosphate to that from which phytol is biosynthesised. At 25 C, further isotopic differences were observed. The variables controlling HBI distributions in R. setigera are still not fully understood and rationalisation of the environmental controls on the sedimentary distributions of the HBIs from R. setigera may only be possible once such factors are established.</div>
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<fA11 i1="09" i2="1"><s1>VOLKMAN (J. K.)</s1>
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<sZ>4 aut.</sZ>
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<s3>AUS</s3>
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<sZ>7 aut.</sZ>
<sZ>8 aut.</sZ>
<sZ>9 aut.</sZ>
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<fC01 i1="01" l="ENG"><s0>Polyunsaturated highly branched isoprenoid (HBI) hydrocarbon distributions of laboratory cultures of five strains of the planktonic diatom Rhizosolenia setigera (Brightwell) are shown herein to be highly variable. Some strains produced both haslenes with from three to five double bonds and rhizenes. The haslenes comprised not only Δ5 alkenes but also those with C7(20) unsaturation, including hasla-7(20),9E,Z, 23-trienes and hasla-7(20),9E,Z-13, 23-tetraenes. The rhizenes contained C7(25) unsaturation and the vinyl moiety common to all algal haslenes so far characterised. The effects of temperature and salinity on HBI composition, along with isotopic content, were determined in strain CS 389/A, Increase in growth temperature from 18 to 25 °C increased the degree of unsaturation in the haslenes and E to Z isomerisation in the triene. There was also an increase in unsaturation in the rhizenes at the highest growth temperature, with hexaenes dominant over the pentaenes but in the rhizenes, Z to E isomerisation increased. Increased salinity from 15 to 35 psu increased cell growth and rhizene production but decreased haslene production. Unsaturation in haslenes was not changed by increased salinity but unsaturation in the rhizenes decreased. These may reflect growth rate differences. The carbon isotopic compositions of the haslenes and rhizenes were similar to that of the major sterol at 18 C, but the major HBI isomers were 3-4 per mil depleted relative to phytol released by saponification from chlorophyll a. This suggests biosynthesis of HBIs from a different isotopic pool of isopentenyl biphosphate to that from which phytol is biosynthesised. At 25 C, further isotopic differences were observed. The variables controlling HBI distributions in R. setigera are still not fully understood and rationalisation of the environmental controls on the sedimentary distributions of the HBIs from R. setigera may only be possible once such factors are established.</s0>
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<s5>03</s5>
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<s5>03</s5>
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<s5>03</s5>
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<s2>FX</s2>
<s5>04</s5>
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<s5>04</s5>
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<fC03 i1="04" i2="X" l="SPA"><s0>Hidrocarburo</s0>
<s2>FX</s2>
<s5>04</s5>
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<fC03 i1="05" i2="X" l="FRE"><s0>Distribution</s0>
<s5>05</s5>
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<fC03 i1="05" i2="X" l="ENG"><s0>Distribution</s0>
<s5>05</s5>
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<s5>05</s5>
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<s5>06</s5>
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<s5>06</s5>
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<fC03 i1="07" i2="X" l="FRE"><s0>Salinité</s0>
<s5>07</s5>
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<s5>07</s5>
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<fC03 i1="07" i2="X" l="SPA"><s0>Salinidad</s0>
<s5>07</s5>
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<fC03 i1="08" i2="X" l="FRE"><s0>Croissance</s0>
<s5>08</s5>
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<fC03 i1="08" i2="X" l="ENG"><s0>Growth</s0>
<s5>08</s5>
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<fC03 i1="08" i2="X" l="SPA"><s0>Crecimiento</s0>
<s5>08</s5>
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<fC03 i1="09" i2="X" l="FRE"><s0>Composition isotopique</s0>
<s5>09</s5>
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<s5>09</s5>
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<fC03 i1="09" i2="X" l="SPA"><s0>Composición isotópica</s0>
<s5>09</s5>
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<fC03 i1="10" i2="X" l="FRE"><s0>Rhizosolenia setigera</s0>
<s2>NS</s2>
<s4>INC</s4>
<s5>72</s5>
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<fC03 i1="11" i2="X" l="FRE"><s0>Carbone 13</s0>
<s2>FF</s2>
<s4>INC</s4>
<s5>83</s5>
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<fC07 i1="01" i2="X" l="FRE"><s0>Phytoplancton</s0>
<s5>40</s5>
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<s5>40</s5>
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<s5>46</s5>
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<s5>46</s5>
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<s2>NS</s2>
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<s2>NC</s2>
<s2>NA</s2>
<s5>50</s5>
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<fC07 i1="06" i2="X" l="ENG"><s0>Carbon Isotopes</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>50</s5>
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<fC07 i1="06" i2="X" l="SPA"><s0>Carbono Isótopo</s0>
<s2>NC</s2>
<s2>NA</s2>
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<server><NO>PASCAL 02-0009968 INIST</NO>
<ET>Factors influencing the distributions of polyunsaturated terpenoids in the diatom, Rhizosolenia setigera</ET>
<AU>ROWLAND (S. J.); ALLARD (W. G.); BELT (S. T.); MASSE (G.); ROBERT (J.-M.); BLACKBURN (S.); FRAMPTON (D.); REVILL (A. T.); VOLKMAN (J. K.)</AU>
<AF>Petroleum and Environmental Geochemistry Group, Department of Environmental Sciences, Plymouth Environmental Research Centre University of Plymouth, Drake Circus/Plymouth PL4 8AA/Royaume-Uni (1 aut., 2 aut., 3 aut., 4 aut.); ISOMer, Facultè des Sciences et des Techniques, Université de Nantes, 2 rue de la Houssinière/44027 Nantes/France (4 aut., 5 aut.); CSIRO Division of Marine Research, Castray Esplanade/Hobart, Tasmania/Australie (6 aut., 7 aut., 8 aut., 9 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Phytochemistry; ISSN 0031-9422; Etats-Unis; Da. 2001; Vol. 58; No. 5; Pp. 717-728; Bibl. 21 ref.</SO>
<LA>Anglais</LA>
<EA>Polyunsaturated highly branched isoprenoid (HBI) hydrocarbon distributions of laboratory cultures of five strains of the planktonic diatom Rhizosolenia setigera (Brightwell) are shown herein to be highly variable. Some strains produced both haslenes with from three to five double bonds and rhizenes. The haslenes comprised not only Δ5 alkenes but also those with C7(20) unsaturation, including hasla-7(20),9E,Z, 23-trienes and hasla-7(20),9E,Z-13, 23-tetraenes. The rhizenes contained C7(25) unsaturation and the vinyl moiety common to all algal haslenes so far characterised. The effects of temperature and salinity on HBI composition, along with isotopic content, were determined in strain CS 389/A, Increase in growth temperature from 18 to 25 °C increased the degree of unsaturation in the haslenes and E to Z isomerisation in the triene. There was also an increase in unsaturation in the rhizenes at the highest growth temperature, with hexaenes dominant over the pentaenes but in the rhizenes, Z to E isomerisation increased. Increased salinity from 15 to 35 psu increased cell growth and rhizene production but decreased haslene production. Unsaturation in haslenes was not changed by increased salinity but unsaturation in the rhizenes decreased. These may reflect growth rate differences. The carbon isotopic compositions of the haslenes and rhizenes were similar to that of the major sterol at 18 C, but the major HBI isomers were 3-4 per mil depleted relative to phytol released by saponification from chlorophyll a. This suggests biosynthesis of HBIs from a different isotopic pool of isopentenyl biphosphate to that from which phytol is biosynthesised. At 25 C, further isotopic differences were observed. The variables controlling HBI distributions in R. setigera are still not fully understood and rationalisation of the environmental controls on the sedimentary distributions of the HBIs from R. setigera may only be possible once such factors are established.</EA>
<CC>002A14B02B</CC>
<FD>Composé ramifié; Terpénoïde; Isoprénoïde; Hydrocarbure; Distribution; Température; Salinité; Croissance; Composition isotopique; Rhizosolenia setigera; Carbone 13</FD>
<FG>Phytoplancton; Bacillariophyta; Heterokontophyta; Algae; Thallophyta; Carbone Isotope</FG>
<ED>Branched compound; Terpenoid; Isoprenoid; Hydrocarbon; Distribution; Temperature; Salinity; Growth; Isotopic composition</ED>
<EG>Phytoplankton; Bacillariophyta; Heterokontophyta; Algae; Thallophyta; Carbon Isotopes</EG>
<SD>Compuesto ramificado; Terpenoide; Isoprenoide; Hidrocarburo; Distribución; Temperatura; Salinidad; Crecimiento; Composición isotópica</SD>
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Factors influencing the distributions of polyunsaturated terpenoids in the diatom, Rhizosolenia setigera

Factors influencing the distributions of polyunsaturated terpenoids in the diatom, Rhizosolenia setigera

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