Involvement of nitrate reductase in auxin-induced NO synthesis.
It is well known for a long time, that nitric oxide (NO) functions in variable physiological and developmental processes in plants, however the source of this signaling molecule in the diverse plant responses is very obscure.1 Although existance of nitric oxide sythase (NOS) in plants is still questionable, LNMMA (N(G)-monomethyl-L-arginine)-sensitive NO generation was observed in different plant species.2,3 In addition, nitrate reductase (NR) is confirmed to have a major role as source of NO.4,5 This multifaced molecule acts also in auxin-induced lateral root (LR) formation, since exogenous auxin enhanced NO levels in regions of Arabidopsis LR initiatives. Our results pointed out the involvement of nitrate reductase enzyme in auxin-induced NO formation. In this addendum, we speculate on auxin-induced NO production in lateral root primordial formation.
Kolbert
Zsuzsanna
Z
Department of Plant Biology; Faculty of Science and Informatics; University of Szeged; Szeged Hungary.
Erdei
L
L
Planta. 2001 Apr;212(5-6):835-41
11346959
Physiol Plant. 2008 Jun;133(2):406-16
18298414
J Exp Bot. 2006;57(3):581-8
16410257
Plant J. 2005 Sep;43(6):849-60
16146524
Planta. 2004 Apr;218(6):900-5
14716561
Proc Natl Acad Sci U S A. 2002 Dec 10;99(25):16314-8
12446847
Plant Physiol. 2002 Jul;129(3):954-6
12114551
J Exp Bot. 2007;58(6):1397-405
17317674
Plant Physiol. 2000 Dec;124(4):1739-51
11115890
Plant Cell Environ. 2008 May;31(5):622-31
18034772
Plant Physiol. 2003 Jul;132(3):1241-8
12857806