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Abstract
The development of plant root systems is sensitive to the availability and distribution of nutrients within the soil. For example, lateral roots proliferate preferentially within nitrate (NO3 –)-rich soil patches. A NO3 −-inducible Arabidopsis gene (ANR1), was identified that encodes a member of the MADS box family of transcription factors. Transgenic plants in whichANR1 was repressed had an altered sensitivity to NO3 – and no longer responded to NO3 –-rich zones by lateral root proliferation, indicating that ANR1 is a key determinant of developmental plasticity in Arabidopsis roots.
↵* To whom correspondence should be addressed. E-mail: brian.forde{at}bbsrc.ac.uk
