Salicylic Acid Mitigates Pb Stress In Nicotiana Tabacum

Abstract

The exposure of plants to Pb stress increases the generation of reactive oxygen species (ROS) including O2-, H2O2 and ˉOH. ROS are highly reactive substances that capable of altering normal cellular metabolism via oxidative damage to membranes, proteins, and nucleic acids. Compound involves in the detoxification of Pb stress is important to reduce the toxic effect of Pb. Stress signaling compounds like salicylic acid (SA) is one of the plant defense mechanisms to mitigate Pb toxicity. This study aimed to observe the effect of SA on the morpho-physiology, accumulation of Pb content and the production of O2-and H2O2 of N. tabacum grown under Pb stress. N. tabacum was propagated and treated with SA and Pb treatments. Then, the morpho-physiology of N. tabacum was observed and measured, histochemical staining of diaminobenzidine (DAB) and nitro blue tetrazolium (NBT), and Inductively coupled plasma mass spectrometry (ICP-MS) were conducted to assesses the effect of SA on the accumulation of O2-and H2O2, and Pb content in Pb-treated N. tabacum. The finding of this study showed the application of SA improved growth parameters, diminished the accumulation of oxidative stress as well as reduced Pb content. SA might detoxify Pb, thus alleviate Pb toxicity.

In-situ localization and biochemical analysis of bio-molecules reveals Pb-stress amelioration in Brassica juncea L. by co-application of 24-Epibrassinolide and Salicylic Acid

“…Cd in Zea mays 84 , Pb in B . juncea 85 , As in Raphanus sativus 86 and Ni in Nicotiana tabaccum 22 was reported in SA pre-treated plants. Reduced uptake of Pb in Chlorella vulgaris cells has been reported under 24-EBL treatment by Bajguz 87 .…”

“…A few avoidance mechanisms include enhanced accumulation of metal chelating compounds, phenolic compounds and osmoprotectants 20 . More recently, use of exogenous application of plant growth regulators (PGRs) to provide protection to plants against oxidative stress has gained attention 8,9,21,22 . Various phytohormones including auxins (AUX), gibberellins (GBs), ethylene (ET), brassinosteroids (BRs), jasmonic acid (JA) and salicylic acid (SA) have been studied for their positive potential to promote growth and elevate tolerance of plants to heavy metal toxicity 23,24 .…”

“…Exogenous supplementation with SA to metal stressed plants led to growth promotion and improved photosynthetic efficacy 35,36 , reduced ROS levels 37 and altered osmolyte levels 38,39 . It has been studied for its anti-stress potential in tobacco 22 , wheat 40 , potato 41 and rice 42 . In response to various environmental cues BRs interplays with other plant hormones to regulate plethora of attributes of growth and developmental processes in plants 43 .…”

High-throughput sequencing of hair follicle development-related micrornas in cashmere goat at various fetal periods

“…Liu (2012) had detected microRNA expression in cashmere goat skin at catagen and discovered 316 conserved microRNAs and 22 new microRNA. In this project, 498 new conserved mature microRNAs have been discovered through sheep genomic sequence comparison (Razali and Said, 2017, Abdul Halim and Phang, 2017, Shamsudin et al, 2017). This may be related to differences in reference genome and goat variety (all experimental animals are produced by Inner Mongolia cashmere goats).…”

Effects of out-of-hospital continuing nursing on schizophrenia patients' rehabilitation and quality of life

“…Inclusion criteria included: Meeting diagnostic criteria for schizophrenia in the Classification and Diagnostic Criteria for Mental Disorders, Third Edition (CCMD-3) and International Classification of Diseases, tenth (ICD-10) [ 2 ]; recurrent attacks; meeting image examination standard (see Fig.1 ); aged 18-59 years; without serious physical illness and organic brain disease; achieve clinical recovery at discharge; patients and their families are willing to cooperate with the study; at least one person has been living with the patient and has a better understanding of the patient’s condition. Those who did not meet the above requirements were excluded from the study.…”