Hidrojen Peroksit ve Nitrik Oksit İlişkisinin Bitkilerde Abiyotik Stres Toleransındaki Rolü

Hydrogen peroxide (H 2 O 2 )and Nitric oxide (NO) are signalling molecules that play an important role in different organisms. Even though intensive research in the past two decades, knowledge about the role of these two molecules interact with each other in abiotic stress tolerance and the relationship with biological processes aren’t completely elucidated yet. In this paper, H 2 O 2 and NO cross-talk and possible role in plant responses to abiotic stresses such as drought, salinity, extreme temperatures, UV irradiation and heavy metals at the level of biosynthesis and gene expression and protein activities are investigated in light of recent literature. In addition, the cross-talk between H 2 O 2 and NO with other signalling pathways in the regulation of abiotic stress responses in plants is also discussed.