A different role for @entity273 and the antioxidative system under short and long salt stress in XXXX roots.

@entity1219 @entity2041 @entity5598 @entity273 @entity9050 @entity70852
Salinity affects normal growth and development of plants depending on their capacity to overcome the induced stress. The present study was focused on the response and regulation of the antioxidant defence system in @entity5598 roots under short and long salt treatments. The function and the implications of @entity273 as a stressor or as a signalling molecule were also studied. Two different zones were analysed--the elongation and differentiation zone and the fully differentiated root zone--in order to broaden the knowledge of the different effects of salt stress in root. In general, an accumulation of @entity273 was observed in both zones at the highest (80 mM @entity1219 ) concentration. A higher accumulation of @entity273 was observed in the stele of salt-treated roots. At the subcellular level, mitochondria accumulated @entity273 in salt-treated roots. The results confirm a drastic decrease in the antioxidant enzymes @entity70852 , @entity9050 peroxidase, and peroxidases under short salt treatments. However, @entity70852 and peroxidase activities were recovered under long salt stress treatments. The two antioxidant molecules analysed, @entity9050 and @entity2041 , showed a different trend during salt treatments. @entity9050 was progressively accumulated and its redox state maintained, but @entity2041 was highly accumulated at 24 h of salt treatment, but then its concentration and redox state progressively decreased. Concomitantly, the antioxidant enzymes involved in @entity9050 and @entity2041 regeneration were modified under salt stress treatments. In conclusion, the increase in @entity9050 levels and the maintenance of the redox state seem to be critical for root growth and development under salt stress.
