Nitrite, Sodium Nitroprusside, Potassium Ferricyanide and Hydrogen Peroxide Release Dormancy of Amaranthus Retroflexus Seeds in a Nitric Oxide-Dependent Manner

Document Type

Journal Article




Faculty of Computing, Health and Science


School of Natural Sciences / Centre for Ecosystem Management




This article was originally published as: Liu, X., Deng, Z., Cheng, H., He, X. , & Song, S. (2011). Nitrite, sodium nitroprusside, potassium ferricyanide and hydrogen peroxide release dormancy of Amaranthus retroflexus seeds in a nitric oxide-dependent manner. Plant Growth Regulation, 64(2), 155-161. Original article available here


Nitric oxide (NO) and reactive oxygen species (ROS) are important regulators involving various processes of plant growth and development. Amaranthus retroflexus L. seeds possess a relative dormancy property that means freshly collected seeds can only germinate over a limited, high temperature range. Here, we show that the relative dormancy of A. retroflexus seeds could be significantly released following treatments with exogenous NO/cyanide (CN) donors such as nitrite, gases evolved from acidified nitrite, sodium nitroprusside (SNP), potassium ferricyanide (Fe(III)CN) and gases evolved from SNP or Fe(III)CN solutions, as well as exogenously supplied ROS, hydrogen peroxide (H(2)O(2)). However, the effectiveness varied among these chemicals. Gases evolved from acidified nitrite displayed maximum effect while H(2)O(2) had minimum effect. We also show that the effects of these compounds could be significantly inhibited by NO specific scavenger 2-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl 3-oxide (PTIO), indicating that NO signaling pathway might play a central role in the dormancy release and germination of A. retroflexus seeds, while both ROS and CN might act through NO-dependent signaling cascades.


Link to publisher version (DOI)