期刊
FREE RADICAL BIOLOGY AND MEDICINE
卷 106, 期 -, 页码 315-328出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.freeradbiomed.2017.02.042
关键词
Helianthus annuus; Long distance signaling; Melatonin; Nitric oxide; Salinity; Seedling growth; Sunflower; Superoxide dismutase
资金
- University of Delhi [MRP-Major-BOTA-2013-9662]
- Council of Scientific & Industrial Research (CSIR), New Delhi [09/045(1289)/2013-EMR I]
Salinity results in significant reduction in sunflower (Helianthus annuus L.) seedling growth and excessive generation of reactive oxygen species (ROS). Present work highlights the possible role of melatonin as an antioxidant through its interaction with nitric oxide (NO), and as an early and long distance NaCl-stress sensing signaling molecule in seedling cotyledons. Exogenous melatonin (15 mu M) +/- NaCl (120 mM) inhibit seedling growth, which is also correlated with NO availability, accumulation of potential superoxide anion (O-2(center dot-)) and peroxynitrite anion (ONOO-), extent of tyrosine-nitration of proteins, spatial localization and activity of superoxide dismutase (SOD) isoforms. NO acts at a positive modulator of melatonin accumulation in seedling cotyledons as a long-distance signaling response. Modulation of superoxide anion and peroxynitrite anion content by melatonin highlights its crucial role in combating deleterious effects of ROS and reactive nitrogen species (RNS). Present findings provide evidence for an interaction between melatonin and NO in their effect on seedling growth under salt stress accompanying differential modulation of two SOD isoforms, i.e. Cu/Zn SOD and Mn SOD.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据