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Annals of Botany 80: 125-129, 1997
© 1997 Annals of Botany Company
Fibres and Fibre-sclereids in Wild-typeArabidopsis thaliana
Department of Plant Genetics, The Weizmann Institute of Science, Rehovot, 76100, Israel
Recevied August 13, 1996 ; Accepted February 6, 1997 .
Examination of the fibre system in roots and shoots ofArabidopsis thaliana(L.) Heynh. revealed three types of fibres, distinguished according to their site of differentiation: (1) short fibre-sclereids in the secondary phloem of roots and shoots at the rosette level; (2) long fibres in the secondary xylem of the main root; and (3) very long fibres in the xylem of the inflorescence stems. These three types are in addition to the small number of primary phloem fibres that are formed even in smallA. thalianaindividuals. These findings provide a basis for the use ofArabidopsis thalianaas a model system to study the processes leading to fibre differentiation in dicotyledons.
Arabidopsis thaliana; differentiation; fibre-sclereids; inflorescences; phloem fibres; xylem
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