Effect of 24-epibrassinolide on UCB1 pistachio rootstock under salinity stress
Salinity is one of the most challenging environmental conditions, which limits plant growth and development. We conducted an experiment to investigate the effect of 24-epibrassinolide (EBR) on pistachio UCB1 rootstock under salinity stress in greenhouse. The study was arranged as factorial experiment in completely randomized block design with three replications. Salinity treatments were 6, 8, 10, 12 dS m-1 and 2 dS m-1 was considered as a control. After two months when UCB1 seedlings reached to the desired salinity and maintained at those levels, EBR at concentrations of 0.5 and 1 µM was foliar sprayed on rootstocks. Results showed that salinity at 12 dS m-1 had the most adverse effects on UCB1 morphological and biochemical traits. However, EBR at 0.5 and 1 µM significantly mitigated the negative effects of salinity. Ion leakage and malondialdehyde of seedling leaves were reduced remarkably by EBR foliar spray and as a result, the integrity of cell membranes was preserved. EBR at both concentrations increased plants height, proline, chlorophyll content, and total proteins. EBR application improved seedlings growth and development especially under 8 and 10 dS m-1 salinity stress.
Sadeghi, A., Tavassolian, I. and Panahi, B. (2018). Effect of 24-epibrassinolide on UCB1 pistachio rootstock under salinity stress. Acta Hortic. 1219, 177-184
chlorophyll content, foliar spray, malondialdehyde, proline, shoot growth