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TIP1 is required for both tip growth and non-tip growth in Arabidopsis

Published online by Cambridge University Press:  01 January 1998

EOIN RYAN
Affiliation:
Department of Cell Biology, John Innes Centre, Norwich NR4 7UH, UK Department of Botany, University College, Dublin 4, Ireland
CLAIRE S. GRIERSON
Affiliation:
Department of Cell Biology, John Innes Centre, Norwich NR4 7UH, UK Department of Cell Biology, IACR-Long Ashton Research Station, Department of Agricultural Sciences, University of Bristol, Long Ashton, Bristol BS18 9AF, UK
ALISON CAVELL
Affiliation:
Department of Cell Biology, IACR-Long Ashton Research Station, Department of Agricultural Sciences, University of Bristol, Long Ashton, Bristol BS18 9AF, UK
MARTIN STEER
Affiliation:
Department of Botany, University College, Dublin 4, Ireland
LIAM DOLAN
Affiliation:
Department of Cell Biology, John Innes Centre, Norwich NR4 7UH, UK
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Abstract

TIP1 is a gene defined by an X-ray induced allele tip1–2 and a previously described EMS-induced allele tip1−1. TIP1 is involved in plant cell growth. tip1–2 plants display growth defects throughout the plant and exhibit defects in both root-hair and pollen-tube growth. tip1–2 plants are partly male sterile resulting from a combination of pollen germination and pollen-tube defects; their root-hairs are short, exhibit a tendency to branch and 2–4 hairs can initiate from each hair cell. They are also slightly dwarf in stature as a result of a general decrease in cell growth indicating that TIP1 activity is required for general cell growth. We propose a role for TIP in both the initiation and maintenance of growth in tip-growing cells. In addition TIP1 activity is required for normal cell expansion (non-tip cell growth) indicating that TIP1 is not exclusively involved in tip-growth.

Type
Research Article
Copyright
Trustees of the New Phytologist 1998

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