I am doing experiment on cold tolerance of winter season grasses in field condition, and different NPK fertilizer levels are applied to optimize dose for coping winter tress for northern clime of china.
Now i want to know Antioxidant enzymes activity will higher in lower levels of NPK (where plants are very poor due to cold) or higher levels of NPK (where plants are healthy)......
Thanks
Hi Muhammad the response to antioxidant enzymes is very complex.
In brief
I hope that plants with good dose of NPK responds better to cold stress. The nitrogen is involved at the metabolism of proteins, equally the enzymes of ROS too. The K is envolved as the of membrane transports between the cells and transpors of phloem while the P is envolved to energy process, ATP... So, high levels of NPK could give the plants more capacity to suport the stress and more enzimatical activity.
Take a look in this reviews
When Bad Guys Become Good Ones: The Key Role of Reactive Oxygen Species and Nitric Oxide in the Plant Response to Abiotic Stress
By: Farnese, Fernanda S.; Menezes-Silva, Paulo E.; Gusman, Grasielle S.; et al.
ROS Regulation During Abiotic Stress Responses in Crop Plants
By: You, Jun; Chan, Zhulong
Low temperature tolerance in plants: Changes at the protein level
By: Janmohammadi, Mohsen; Zolla, Lello; Rinalducci, Sara
Good luck in yours experiments
Best regards