| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 2015788 | Plant Physiology and Biochemistry | 2014 | 9 Pages |
•Exogenous NO decreased Zn concentration in well-supplied wheat plants.•During the recovery of Zn-deprivation, net Zn uptake rate was partially blocked by NO.•NO modulates root-to-shoot translocation during the recovery of Zn-deprivation.
The effect of addition of the nitric oxide donor S-nitrosoglutathione (GSNO) on the Zn nutritional status was evaluated in hydroponically-cultured wheat plants (Triticum aestivum cv. Chinese Spring). Addition of GSNO in Zn-deprived plants did not modify biomass accumulation but accelerated leaf senescence in a mode concomitant with accelerated decrease of Zn allocation to shoots. In well-supplied plants, Zn concentration in both roots and shoots declined due to long term exposure to GSNO. A further evaluation of net Zn uptake rate (ZnNUR) during the recovery of long-term Zn-deprivation unveiled that enhanced Zn-accumulation was partially blocked when GSNO was present in the uptake medium. This effect on uptake was mainly associated with a change of Zn translocation to shoots. Our results suggest a role for GSNO in the modulation of Zn uptake and in root-to-shoot translocation during the transition from deficient to sufficient levels of Zn-supply.
