Effects of Ethephon and Brassinolide on Resistance of Rosa chinensis'Aisha'to Botrytis cinerea Stress
This study aims to explore the effects of ethephon and brassinolide on the resistance of Rosa chinensis'Aisha'to gray mold.The petals were treated with ethephon or brassinolide at 0(control),0.1,0.3,and 0.5 mg/L and then infected with Botrytis cinerea.The phenotypic characteristics were observed,and the activities of peroxidase(POD),superoxide dismutase(SOD),catalase(CAT)and the content of malondialdehyde(MDA)were determined by kits.The results showed that the lesion diameters in the ethephon groups were larger than that in the control group.As the concentration of ethephon used for spraying increased,the activities of POD,SOD,and CAT first increased and then decreased,and the MDA content increased significantly.The brassinolide treatment inhibited the development of petal lesions.As the concentration of brassinolide used for soaking increased,the activity of POD increased obviously,and the activities of SOD and CAT increased significantly,while the content of MDA decreased significantly.In summary,ethephon attenuated the resistance of R.chinensis'Aisha'to gray mold,whereas brassinolide enhanced the resistance.
Rosa chinensis'Aisha'gray moldethephonbrassinolideenzyme activitydisease resistance
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