Expressed Sequence Tags from a Root-Hair-Enriched Medicago truncatula cDNA Library1

Author:

Covitz Peter A.1,Smith Lucinda S.12,Long Sharon R.12

Affiliation:

1. Department of Biological Sciences (P.A.C., L.S.S., S.R.L.),

2. and Howard Hughes Medical Institute (L.S.S., S.R.L.), Stanford University, Stanford, California 94305–5020

Abstract

Abstract The root hair is a specialized cell type involved in water and nutrient uptake in plants. In legumes the root hair is also the primary site of recognition and infection by symbiotic nitrogen-fixingRhizobium bacteria. We have studied the root hairs ofMedicago truncatula, which is emerging as an increasingly important model legume for studies of symbiotic nodulation. However, only 27 genes from M. truncatulawere represented in GenBank/EMBL as of October, 1997. We report here the construction of a root-hair-enriched cDNA library and single-pass sequencing of randomly selected clones. Expressed sequence tags (899 total, 603 of which have homology to known genes) were generated and made available on the Internet. We believe that the database and the associated DNA materials will provide a useful resource to the community of scientists studying the biology of roots, root tips, root hairs, and nodulation.

Publisher

Oxford University Press (OUP)

Subject

Plant Science,Genetics,Physiology

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