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pubmed-article:16666660pubmed:dateCreated2010-6-29lld:pubmed
pubmed-article:16666660pubmed:abstractTextPrevious labeling experiments with (18)O(2) have supported the hypothesis that stress-induced abscisic acid (ABA) is synthesized through an indirect pathway involving an oxygenated carotenoid (xanthophyll) as a precursor. To investigate ABA formation under nonstress conditions, an (18)O(2) labeling experiment was conducted with isolated embryos from in vitro grown maize (Zea mays L.) kernels. Of the ABA produced during the incubation in (18)O(2), three-fourths contained a single (18)O atom located in the carboxyl group. Approximately one-fourth of the ABA synthesized during the experiment contained two (18)O atoms. These results suggest that ABA synthesized in maize embryos under nonstress conditions also proceeds via the indirect pathway, requiring a xanthophyll precursor. It was also found that the newly synthesized ABA was preferentially released into the surrounding medium.lld:pubmed
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pubmed-article:16666660pubmed:languageenglld:pubmed
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pubmed-article:16666660pubmed:statusPubMed-not-MEDLINElld:pubmed
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pubmed-article:16666660pubmed:issn0032-0889lld:pubmed
pubmed-article:16666660pubmed:authorpubmed-author:FongFFlld:pubmed
pubmed-article:16666660pubmed:authorpubmed-author:GageD ADAlld:pubmed
pubmed-article:16666660pubmed:authorpubmed-author:ZeevaartJ AJAlld:pubmed
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pubmed-article:16666660pubmed:volume89lld:pubmed
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pubmed-article:16666660pubmed:pagination1039-41lld:pubmed
pubmed-article:16666660pubmed:dateRevised2010-9-14lld:pubmed
pubmed-article:16666660pubmed:year1989lld:pubmed
pubmed-article:16666660pubmed:articleTitleAbscisic Acid Biosynthesis in Isolated Embryos of Zea mays L.lld:pubmed
pubmed-article:16666660pubmed:affiliationMichigan State University-Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824.lld:pubmed
pubmed-article:16666660pubmed:publicationTypeJournal Articlelld:pubmed
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