Document Type : Research Paper
1 aDepartment of Horticultural Science and Landscape Engineering, Faculty of Plant Production, Gorgan University of Agricultural Sciences and Natural Resources (GUASNR), Gorgan 49138-43464, Golestan, Iran
2 Shahrzad Vazieea, Farshid Ghaderi-farb, Changquang Wangc, Mostafa K. Sarmasta* aDepartment of Horticultural Science and Landscape Engineering, Faculty of Plant Production, Gorgan University of Agricultural Sciences and Natural Resources (GUASNR), Gor
Abiotic stresses severely impose growth and yield in many plant species. In this experiment the leaf stomata and some metabolites response to cold, heat, drought, salinity and ultraviolet stresses have investigated in a completely randomized design in the growth chamber and greenhouse condition. Research results indicate a different response of Chinese rose to different stresses condition wherein the level and duration of stress has clearly changed compared to the control. Decreased leaf chlorophyll content and increased carotenoids are evident in almost all the stresses condition. Leaf stomata density has increased at all stresses condition except UV stress, while stomata aperture response varied according to stress intensity and exposure time. The activity of enzymes effective in scavenging ROS increased with stress intensity in almost all stresses, but due to the type of stress, the activity of the enzyme was specialized, so that in some stresses catalase and in others peroxidase were more active, suggesting the specific activity of antioxidant enzymes in dealing with a specific type of abiotic stress. Overall, understanding the connection between leaf stomata and key biochemical to some extent can lead to a better understanding of the mechanism of resistance to abiotic stress in roses.
Key words: Salt stress, Cold stress, Drought stress, Heat Stress, UV stress