The Arabidopsis AtIPT8/PGA22 gene encodes an isopentenyl transferase that is involved in de novo cytokinin biosynthesis.

@article{Sun2003TheAA,
  title={The Arabidopsis AtIPT8/PGA22 gene encodes an isopentenyl transferase that is involved in de novo cytokinin biosynthesis.},
  author={Jiaqiang Sun and Q W Niu and Petr Tarkowski and Binglian Zheng and Danu{\vs}e Tarkowsk{\'a} and G{\"o}ran K Sandberg and Nam-Hai Chua and Jianru Zuo},
  journal={Plant physiology},
  year={2003},
  volume={131 1},
  pages={167-76}
}
Cytokinin plays a critical role in plant growth and development by stimulating cell division and cell differentiation. Despite many years' research efforts, our current understanding of this hormone is still limited regarding both its biosynthesis and signaling. To genetically dissect the cytokinin pathway, we have used a functional screen to identify Arabidopsis gain-of-function mutations that enable shoot formation in the absence of exogenous cytokinins. By using a chemical-inducible… CONTINUE READING

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