Nitrogen deposition and its contribution to nitrogen cycling and associated soil processes |
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| Authors: | K. W. T. GOULDING,N. J. BAILEY,N. J. BRADBURY,P. HARGREAVES,M. HOWE,D. V. MURPHY,P. R. POULTON,& T. W. WILLISON |
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| Affiliation: | Department of Cell Biology, John Innes Centre, Norwich NR4 7UH, UK; Department of Botany, University College, Dublin 4, Ireland; Department of Cell Biology, IACR-Long Ashton Research Station, Department of Agricultural Sciences, University of Bristol, Long Ashton, Bristol BS18 9AF, UK; To whom correspondence should be addressed. |
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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. |
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| Keywords: | Cell growth root-hairs pollen-tubes Arabidopsis |
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