Journal
PLANT AND CELL PHYSIOLOGY
Volume 43, Issue 6, Pages 684-688Publisher
OXFORD UNIV PRESS
DOI: 10.1093/pcp/pcf071
Keywords
Arabidopsis thaliana; C : N ratio; floral stimulus; flowering; phloem sap; Sinapis alba
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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.
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