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Inhibition of Ethylene Biosynthesis by Aminoethoxyvinylglycine and by Polyamines Shunts Label from 3,4-[14C]Methionine into Spermidine in Aged Orange Peel Discs 1

Identifieur interne : 004705 ( Main/Exploration ); précédent : 004704; suivant : 004706

Inhibition of Ethylene Biosynthesis by Aminoethoxyvinylglycine and by Polyamines Shunts Label from 3,4-[14C]Methionine into Spermidine in Aged Orange Peel Discs 1

Auteurs : Zeev Even-Chen ; Autar K. Mattoo ; Raphael Goren

Source :

Plant Physiology [ 0032-0889 ] ; 1982.

RBID : PMC:426215

Abstract

The flux of radioactivity from 3,4-[¹⁴C]methionine into S-adenosyl-l-methionine (SAM), 1-aminocyclopropane-1-carboxylic acid (ACC), spermine, and spermidine while inhibiting conversion of ACC to ethylene by 100 millimolar phosphate and 2 millimolar Co²⁺ was studied in aged peel discs of orange (Citrus sinensis L. Osbeck) fruit. Inhibition up to 80% of ethylene production by phosphate and cobalt was accompanied by a 3.3 times increase of label in ACC while the radioactivity in SAM was only slightly reduced. Aminoethoxyvinylglycine (AVG) increased the label in SAM by 61% and reduced it in ACC by 47%. Different combinations of standard solution, in which putrescine or spermidine were administered alone or with AVG, demonstrated clearly that inhibition of ethylene biosynthesis—at the conversion of SAM to ACC—by AVG, exogenous putrescine or exogenous spermidine, stimulated the incorporation of 3,4-[¹⁴C]methionine into spermidine.

Url:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC426215

PubMed: 16662214
PubMed Central: 426215

Affiliations:

Le document en format XML

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<author><name sortKey="Even Chen, Zeev" sort="Even Chen, Zeev" uniqKey="Even Chen Z" first="Zeev" last="Even-Chen">Zeev Even-Chen</name>
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<author><name sortKey="Mattoo, Autar K" sort="Mattoo, Autar K" uniqKey="Mattoo A" first="Autar K." last="Mattoo">Autar K. Mattoo</name>
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<author><name sortKey="Goren, Raphael" sort="Goren, Raphael" uniqKey="Goren R" first="Raphael" last="Goren">Raphael Goren</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Inhibition of Ethylene Biosynthesis by Aminoethoxyvinylglycine and by Polyamines Shunts Label from 3,4-[<sup>14</sup>
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<author><name sortKey="Even Chen, Zeev" sort="Even Chen, Zeev" uniqKey="Even Chen Z" first="Zeev" last="Even-Chen">Zeev Even-Chen</name>
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<author><name sortKey="Mattoo, Autar K" sort="Mattoo, Autar K" uniqKey="Mattoo A" first="Autar K." last="Mattoo">Autar K. Mattoo</name>
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<series><title level="j">Plant Physiology</title>
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<front><div type="abstract" xml:lang="en"><p>The flux of radioactivity from 3,4-[<sup>14</sup>
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-methionine (SAM), 1-aminocyclopropane-1-carboxylic acid (ACC), spermine, and spermidine while inhibiting conversion of ACC to ethylene by 100 millimolar phosphate and 2 millimolar Co<sup>2+</sup>
 was studied in aged peel discs of orange (<italic>Citrus sinensis</italic>
 L. Osbeck) fruit. Inhibition up to 80% of ethylene production by phosphate and cobalt was accompanied by a 3.3 times increase of label in ACC while the radioactivity in SAM was only slightly reduced. Aminoethoxyvinylglycine (AVG) increased the label in SAM by 61% and reduced it in ACC by 47%. Different combinations of standard solution, in which putrescine or spermidine were administered alone or with AVG, demonstrated clearly that inhibition of ethylene biosynthesis—at the conversion of SAM to ACC—by AVG, exogenous putrescine or exogenous spermidine, stimulated the incorporation of 3,4-[<sup>14</sup>
C]methionine into spermidine.</p>
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<name sortKey="Mattoo, Autar K" sort="Mattoo, Autar K" uniqKey="Mattoo A" first="Autar K." last="Mattoo">Autar K. Mattoo</name>
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Inhibition of Ethylene Biosynthesis by Aminoethoxyvinylglycine and by Polyamines Shunts Label from 3,4-[14C]Methionine into Spermidine in Aged Orange Peel Discs 1

Inhibition of Ethylene Biosynthesis by Aminoethoxyvinylglycine and by Polyamines Shunts Label from 3,4-[14C]Methionine into Spermidine in Aged Orange Peel Discs 1

Source :

Abstract

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