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. 2013 Nov 12;65(1):185–200. doi: 10.1093/jxb/ert358

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© The Author 2013. Published by Oxford University Press on behalf of the Society for Experimental Biology.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 10. — Model for the NO-mediated nitrate induction of root elongation. NO₃ ^– influx is performed by specific nitrate transporters (e.g. NRT2.1 in the TZ, EZ, and MZ). Once inside the root cells, NO₃ ^– is able to act as a signal to induce its own sensing via the NR/Hb-dependent NO fine-tuning, which in turns seems to be involved in the root elongation stimulation. The cytological events and molecular targets linking the NO biosynthesis to root growth response could be involved in the rearrangements of the actin cytoskeleton (Baluška et al., 2001) and need to be further studied and characterized.