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Gene Review:

Never-ripe - ethylene receptor

Solanum lycopersicum

Ciardi, J.A. et al., Whitelaw, C.A. et al., Barry, C.S. et al., Nakatsuka, A. et al., Wilkinson, J.Q. et al., et al.

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Disease relevance of Never-ripe

Response to Xanthomonas campestris pv. vesicatoria in tomato involves regulation of ethylene receptor gene expression [1].
Stable transformation of tomato (Lycopersicon esculentum cv Ailsa Craig) plants with a construct containing the antisense sequence for the receiver domain and 3'-untranslated portion of the tomato ethylene receptor (LeETR1) under the control of an enhanced cauliflower mosaic virus 35S promoter resulted in some expected and unexpected phenotypes [2].

High impact information on Never-ripe

The ripening-impaired tomato mutant Never-ripe (Nr) is insensitive to the plant hormone ethylene [3].
Ethylene synthesis increased rapidly in dl pistils following pollination, leading to accelerated petal senescence, and was delayed in ethylene-insensitive Never-ripe (Nr) pistils [4].
Differential expression and internal feedback regulation of 1-aminocyclopropane-1-carboxylate synthase, 1-aminocyclopropane-1-carboxylate oxidase, and ethylene receptor genes in tomato fruit during development and ripening [5].
The tomato ethylene receptor LE-ETR3 (NR) is not involved in mediating ozone sensitivity: causal relationships among ethylene emission, oxidative burst and tissue damage [6].

Chemical compound and disease context of Never-ripe

We compared ethylene's role in plant response to virulent and avirulent strains of Xanthomonas campestris pv. vesicatoria in tomato (Lycopersicon esculentum Mill.). The ethylene-insensitive Never ripe (Nr) mutant displays increased tolerance to the virulent strain, while maintaining resistance to the avirulent strain [1].

Biological context of Never-ripe

A double mutant (epi/epi;Nr/Nr) homozygous for both the recessive epi and dominant ethylene-insensitive Never-ripe loci has the same dark-grown seedling and vegetative phenotypes as epi but possesses the senescence and ripening characteristics of Never-ripe [7].

References

Response to Xanthomonas campestris pv. vesicatoria in tomato involves regulation of ethylene receptor gene expression. Ciardi, J.A., Tieman, D.M., Lund, S.T., Jones, J.B., Stall, R.E., Klee, H.J. Plant Physiol. (2000) [Pubmed]
Delayed abscission and shorter Internodes correlate with a reduction in the ethylene receptor LeETR1 transcript in transgenic tomato. Whitelaw, C.A., Lyssenko, N.N., Chen, L., Zhou, D., Mattoo, A.K., Tucker, M.L. Plant Physiol. (2002) [Pubmed]
An ethylene-inducible component of signal transduction encoded by never-ripe. Wilkinson, J.Q., Lanahan, M.B., Yen, H.C., Giovannoni, J.J., Klee, H.J. Science (1995) [Pubmed]
Regulation of ethylene biosynthesis in response to pollination in tomato flowers. Llop-Tous, I., Barry, C.S., Grierson, D. Plant Physiol. (2000) [Pubmed]
Differential expression and internal feedback regulation of 1-aminocyclopropane-1-carboxylate synthase, 1-aminocyclopropane-1-carboxylate oxidase, and ethylene receptor genes in tomato fruit during development and ripening. Nakatsuka, A., Murachi, S., Okunishi, H., Shiomi, S., Nakano, R., Kubo, Y., Inaba, A. Plant Physiol. (1998) [Pubmed]
The tomato ethylene receptor LE-ETR3 (NR) is not involved in mediating ozone sensitivity: causal relationships among ethylene emission, oxidative burst and tissue damage. Castagna, A., Ederli, L., Pasqualini, S., Mensuali-Sodi, A., Baldan, B., Donnini, S., Ranieri, A. New Phytol. (2007) [Pubmed]
Analysis of the ethylene response in the epinastic mutant of tomato. Barry, C.S., Fox, E.A., Yen, H., Lee, S., Ying, T., Grierson, D., Giovannoni, J.J. Plant Physiol. (2001) [Pubmed]

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