PJB-2020-49
ALLEVIATION OF SALT STRESS EFFECTS BY MORINGA LEAF EXTRACT OR SALICYLIC ACID THROUGH ENHANCING ANTIOXIDANT MACHINERY IN DAMASK ROSE
Fahmy Hassan
Abstract
Despite the fact that damask rose has a higher economic value among aromatic plants, its growth and development has been severely inhibited by salt stress. Reports show that moringa leaf extract (MLE) or salicylic acid (SA) are involved in salt stress tolerance. Nevertheless, scarce information is available about MLE or SA impacts on aromatic plants, especially damask rose under salinity. This investigation was therefore conducted to investigate the effects of MLE and/or SA on salt stress mitigation in damask rose. Rose plants were treated with 200 mM NaCl, and foliar applied with MLE at 1:30 (v:v) and/or 0.2 mM SA. Plants that distilled water sprayed were set as a control. Under salt stress, foliar spraying with MLE and/or SA enhanced the growth attributes, chlorophyll content and relative water content (RWC). Proline content and membrane stability index (MSI) in stressed plants were considerably improved due to MLE and/or SA application. Less accumulation of malondialdehyde (MDA) and H2O2 were also observed when MLE and/or SA were applied under salinity. Further, MLE and/or SA applications considerably increased the radical scavenging activity, total phenol content and antioxidant enzyme activity (CAT and SOD) under stress. The mitigative effect of MLE or SA was more pronounced when they were applied in combination. It is concluded that MLE and/or SA have efficient antioxidant defense system that scavenged ROS, and thus afforded considerable protection against salt-induced oxidative damage.
To Cite this article:
Download
