Aloe veralong-term saline irrigation increases contents of hydrogen peroxide, lipid peroxidation and phenolic compounds

Abstract

Salt stress is more and more becoming a serious problem in the world especially if we consider its damaging effect on the plant growth and yield. The cultivation of medicinal plants, such as Aloe vera, might be an alternative for the saline water use and salt-affected soils occupation. Aloe vera, commonly known as aloe, is one of the primary medicinal plants with multipurpose applications going from pharmaceutical to cosmetic aspects with a promising economic return. Aloe plants were cultivated and irrigated, for 14 months, with drinking water (C0) and with two levels of salt (C1 and C2). Changes in growth, hydrogen peroxide (H 2 O 2 ), lipid peroxidation and phenolic compounds were examined in leaves at harvest. Depressive effects of salt irrigation on the plant growth parameters and a perturbation in inorganic ion contents were found especially with a high level of salt in the irrigation water. The intracellular oxidative stress was evaluated with the H 2 O 2 production. Our results showed that the H 2 O 2 content increased with the accumulation of the toxic ion (Na) in the leaf tissues. In addition, lipid peroxidation, measured by the malondialdehyde (MDA) level, increased as well with salt augmentation in the irrigation water. In response to salt stress, Aloe leaves showed a significant increase in the levels of phenolic compounds too. These results suggest that Aloe can be planted in soils affected by salinity and irrigated with salt water at least at a moderate concentration used in the present study.

Chromosomal and Nuclear Alterations in the Root Tip Cells of Vicia faba Induced by Sodium Chloride

“…The genotoxicity of increased salt content may also be attributed to perturbations of the balance between cellular sulphydryl groups and disulphide bonds (Tarin et al, 1996), and the excessive generation of reactive oxygen species (ROS). Several reports showed an overproduction of ROS in plants under saline conditions (Souguir et al, 2015;Wang et al, 2015) which caused damage to cellular structures and macromolecules, especially DNA. A relationship was found between the induction of micronuclei and lipid peroxidation under several stress conditions such as Cd treatment (Souguir et al, 2011;Unyayar et al, 2006).…”

Soft Ionic Pressure Sensor with Aloe Vera Gel for Low-Pressure Applications

“…Similarly, it has also been shown that increased aloe gel concentration and higher ohmic heating (indirectly related to voltage gradient) results in higher electric conductivity of the gel [10]. Both these results suggest that aloe vera gel inherently contains electrolytic ions (such as Ca, K, Mg, and Na [11]) that can be leveraged into developing a more sensitive pressure sensor without adding a large number of external ions.…”

Using Sugarcane Waste to Reduce Cytogenetic Impairment in Vicia faba

“…Salt stress enhances an overproduction of reactive oxygen species (ROS), and this irregularity in ROS causes a remarkable delay in the switch from prophase to pro-metaphase, which influences chromosome separation in anaphase, chromosomal development, and nuclear dynamics (Foreman et al, 2003;Teixeira, 2018). Some reports demonstrated an overproduction of ROS in plants under brackish conditions (Souguir et al, 2015;Wang et al, 2015) which triggered harm cell structures and macromolecules, particularly DNA. Sobieh et al (2019) reported that, with the increase of salt stress there was a significant accumulation of osmoprotectants (proline) and induction of DNA reparations.…”