NDLI: Copper sensitivity of nia1nia2noa1-2 mutant is associated with its low nitric oxide (NO) level

Content Provider	Springer Nature Link
Author	Kolbert, Zsuzsanna Pető, Andrea Lehotai, Nóra Feigl, Gábor Erdei, László
Copyright Year	2015
Abstract	Copper (Cu) in excess can disturb the cell redox status maintained by reactive oxygen- (ROS) and nitrogen species. With the help of the nitric oxide (NO)-deficient nia1nia2noa1-2 mutant, the role of NO in copper stress tolerance and its relationship with ROS was examined. Under control conditions and also during Cu exposure, the NO level in the cotyledon and root tip of the mutant was significantly lower compared to the wild-type (WT) suggesting the contribution of the nitrate reductase- and nitric oxide associated 1-dependent pathways to NO synthesis. The cell viability decrease was more pronounced in the triple mutant and the originally low growth rate was maintained under Cu stress. The endogenous NO level of the mutant was increased by NO donor addition and its cell viability significantly improved suggesting that the Cu sensitivity of the nia1nia2noa1-2 mutant is directly associated with its low NO content. As the effect of Cu increased ROS formation occurred in WT roots, while the originally high ROS levels of the triple mutant slightly decreased, still remaining significantly higher than those in the WT. In the cotyledons of the triple mutant 5 µM Cu induced ROS production but NO formation failed, while in the WT cotyledons NO but no ROS accumulation was observed. The promoting effect of NO deficiency on ROS production assumes an antagonism between these molecules during Cu stress. Based on the results, it can be concluded that NO contributes to copper tolerance and its deficiency favours for ROS production.
Starting Page	255
Ending Page	263
Page Count	9
File Format	PDF
ISSN	01676903
Journal	Plant Growth Regulation
Volume Number	77
Issue Number	2
e-ISSN	15735087
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-03-29
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Copper stress nia1nia2noa1-2 Nitric oxide Reactive oxygen species Plant Sciences Plant Anatomy/Development Plant Physiology Agriculture
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science Agronomy and Crop Science

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