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Gene Review:

HB-8 - homeobox-leucine zipper protein ATHB-8

Arabidopsis thaliana

Synonyms: ATHB-8, ATHB8, T16I18.90, T16I18_90, homeobox gene 8

Baima, S. et al., Sessa, G. et al., Ohashi-Ito, K. et al., Baima, S. et al.

Ohashi-Ito, Demura, Fukuda,

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High impact information on ATHB-8

The expression of the Athb-8 homeobox gene is restricted to provascular cells in Arabidopsis thaliana [1].
In particular, a careful anatomical analysis of the transgenic plants indicated that the overexpression of ATHB-8 promotes vascular cell differentiation [2].
ATHB-8, a gene positively regulated by auxin (Baima et al., 1995), is considered an early marker of the procambial cells and of the cambium during vascular regeneration after wounding [2].
The stimulation of primary and secondary vascular cell differentiation resulted in complex modifications of the growth and development of the ATHB-8 transgenic plants [2].
We report the isolation and characterization of two Arabidopsis homeobox genes highly related to the Athb-8 gene [3].

Other interactions of ATHB-8

ZeHB-10, -11 and -12 encode for HD-Zip proteins of the class III to which Arabidopsis Athb-8, -9, -14, -15 and IFL1 belong [4].
Athb-8, -9 and -14 are members of a small family of HD-Zip proteins (HD-ZIP III) characterized by a HD-Zip motif confined to the N-terminus of the polypeptide [3].

References

The expression of the Athb-8 homeobox gene is restricted to provascular cells in Arabidopsis thaliana. Baima, S., Nobili, F., Sessa, G., Lucchetti, S., Ruberti, I., Morelli, G. Development (1995) [Pubmed]
The arabidopsis ATHB-8 HD-zip protein acts as a differentiation-promoting transcription factor of the vascular meristems. Baima, S., Possenti, M., Matteucci, A., Wisman, E., Altamura, M.M., Ruberti, I., Morelli, G. Plant Physiol. (2001) [Pubmed]
The Arabidopsis Athb-8, -9 and -14 genes are members of a small gene family coding for highly related HD-ZIP proteins. Sessa, G., Steindler, C., Morelli, G., Ruberti, I. Plant Mol. Biol. (1998) [Pubmed]
Promotion of transcript accumulation of novel Zinnia immature xylem-specific HD-Zip III homeobox genes by brassinosteroids. Ohashi-Ito, K., Demura, T., Fukuda, H. Plant Cell Physiol. (2002) [Pubmed]

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