Auxin efflux inhibitor

Fig. 22.3 Consensus effects of Spd and Spm on auxin metabolism and signaling cascade. Description is same as in legends to Fig. 22.1. AFB2 auxin signaling F-box protein 2, ARFs auxin response factors, Awc/IAA indole-3-acetic acid inducible (members of Aux/IAA protein family), AuxRE auxin response cu-elements, GH3 lAA-amido synthetase, lAMTl lAA carboxyl methyl transferase 1, ILL4 lAA amidohydrolase, LAX3 like AUXl 3, PGP 10 P-glycoprotein 10 (auxin efflux carrier), PINl PIN-formed 1, PINS PIN-formed 5, TIRl transport inhibitor response 1, YUC YUCCA...

Mulkey TJ, Evans ML, Kuzmanoff KM (1982 a) Promotion of growth and shift in the auxin dose/response relationship in maize roots treated with the ethylene biosynthesis inhibitors, aminoethoxyvinylglycine and cobalt. Plant Sci Lett 25 43-48 Mulkey TJ, Kuzmanoff KM, Evans ML (1982 b) Promotion of growth and hydrogen ion efflux by auxin in roots of maize pretreated with ethylene biosynthesis inhibitors. Plant Physiol 70 186-188... 

The effects of ABA upon the wave-like pattern of the basipetal efflux of auxin were also observed when the inhibitor was applied for 100 min to the basal ends of tissue blocks (66 mm long). In these tests, however, suppression of the wave amplitudes was observed only at distances up to about 40 mm from the basal end to which ABA was applied (Fig. 7.2 B). This implies that the supracellular oscillatory system, in spite of its polarity, is capable of transmitting signals in both the basipetal and the acropetal direction. The velocity of signal transmission in the acropetal direction, however, appears to be slower. 

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