C : N Ratio Increases in the Phloem Sap During Floral Transition of the Long-Day Plants Sinapis alba and Arabidopsis thaliana | Zendy

Laurent Corbesier | Zendy; Georges Bernier | Zendy; Claire Périlleux | Zendy

Open Access

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

Author(s) -

Laurent Corbesier,

Georges Bernier,

Claire Périlleux

Publication year - 2002

Publication title -

plant and cell physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.975

H-Index - 152

eISSN - 1471-9053

pISSN - 0032-0781

DOI - 10.1093/pcp/pcf071

Subject(s) - sinapis , phloem , arabidopsis thaliana , meristem , exudate , biology , botany , arabidopsis , brassicaceae , silique , horticulture , brassica , shoot , biochemistry , mutant , gene

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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