Correction

Corrections

Recent comparisons of the AtPTR2-A cDNA sequence to similar proteins in the database showed that this gene clearly falls into a group containing exclusively yeast and fungal genes. This led us to examine whether this cDNA was indeed derived from an Arabidopsis mRNA. Chromosomal DNA was isolated from ecotypes Columbia, Landsberg, Nossen-1, and Wassilewskija and digested with restriction enzymes EcoRI, HindIII, and BamHI. DNA gel blots containing this DNA were hybridized with a labeled AtPTR2-A cDNA. In repeated attempts, no hybridization was obtained. However, positive hybridization was obtained when the blots were probed with an AtPTR2-B gene probe. Therefore, we conclude from this analysis that AtPTR2-A does not represent a bona fide Arabidopsis gene. We believe that our original results were due to the presence of a common, unidentified fungal contaminant in the plants harvested for analysis. It is also likely that the presence of this common contaminant explains the presence of the AtPTR2-A cDNA in the gene library used in this work. In summary, AtPTR2-A is not a bona fide Arabidopsis gene but more likely is derived from a fungal contaminant. We regret any inconvenience that our mistake may have caused.

I. Brent Heath and Anja Geitmann (2000). Cell Biology of Plant and Fungal Tip Growth—Getting to the Point. Plant Cell 12, 1513–1517.

In the section of this meeting report titled "Environmental Sensing," in reference to the work of Elizabeth Lord, a small adhesion-mediating protein and polygalacturonan were erroneously described as being secreted by pollen tubes; they are in fact produced by the stylar tissue, as reported by Park et al. 2000 and Mollet et al. 2000 .

REFERENCES

Mollet, J.-C., Park, S.-Y., Nothnagel, E.A., and Lord, E.M. (2000) A lily stylar pectin is necessary for pollen tube adhesion to an in vitro stylar matrix. Plant Cell 12:1737-1749[Abstract/Free Full Text].

Park, S.-Y., Jauh, G.-Y., Mollet, J.-C., Eckard, K.J., Nothnagel, E.A., Walling, L.L., and Lord, E.M. (2000) A lipid transfer–like protein is necessary for lily pollen tube adhesion to an in vitro stylar matrix. Plant Cell 12:151-163[Abstract/Free Full Text].

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