Journal Article

C : N Ratio Increases in the Phloem Sap During Floral Transition of the Long-Day Plants <i>Sinapis alba</i> and <i>Arabidopsis thaliana</i>

Laurent Corbesier, Georges Bernier and Claire Périlleux

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 43, issue 6, pages 684-688
Published in print June 2002 | ISSN: 0032-0781
Published online June 2002 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/pcf071
C : N Ratio Increases in the Phloem Sap During Floral Transition of the Long-Day Plants Sinapis alba and Arabidopsis thaliana

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In plants of Sinapis alba and Arabidopsis thaliana, leaf exudate (phloem sap) was analysed during and after a single long day inducing flowering and in control short days. The amounts of carbohydrates and amino acids were measured to estimate the organic C : N ratio. In both species, the C : N ratio of the phloem sap increased markedly and early during the inductive treatment, suggesting that an inequality in organic C and N supply to the apical meristem may be important at floral transition.

Keywords: Keywords: Arabidopsis thaliana — C : N ratio — Floral stimulus — Flowering — Phloem sap — Sinapis alba.; Abbreviations: FMOC, 9-fluorenylmethoxycarbonyl chloride; HPLC, high performance liquid chromatography; LD, long day; SD, short day.

Journal Article.  3155 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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