Salicylic acid alleviates cold-induced photosynthesis inhibition andoxidative stress in Jasminum sambac

Abstract

Salicylic acid (SA) is a signal molecule that mediates many biotic and abiotic stress-induced physiological responses in plants.In the current study the protective effects of SA on cold stress-caused oxidative damage and photosynthesis inhibition in jasmine plants (Jasminum sambac) were examined. Jasmine seedlings were pretreated with 100 µM SA for 3 days and then subjected to cold stress (4 °C) for 15 days. The amounts of superoxide radicals (O 2 -) and hydrogen peroxide (H 2 O 2 ) significantly increased in leaves of plants exposed to cold stress and resulted in oxidative damage, indicated by an increase in malondialdehyde accumulation and membrane leakage. The total chlorophyll content, stomatal conductance (g s ), photochemical efficiency (F v /F m ), and net photosynthesis rate (P n ) were significantly reduced in response to the cold treatment. However, plants pretreated with exogenous SA (100 µM) exhibited significantly higher photosynthesis-related parameters and antioxidant enzyme activities (peroxidase and catalase) and lower reactive oxygen species levels compared with the cold control. It was therefore concluded that SA could alleviate the cold treatment-caused oxidative stress and photosynthesis decline by enhancing the activities of antioxidant enzymes in leaves of jasmine.

Exogenous glutathione attenuates lead-induced oxidative stress in wheat by improving antioxidant defense and physiological mechanisms

“…So, high water and soil Pb content have become acute environmental hazards (Silva et al 2017). Lead is spread from the environment and enters into the human body through food ingestion, water and air (Piano et al 2008;Cai et al 2015).…”

Salicylic Acid Mitigates Pb Stress In Nicotiana Tabacum

“…The high accumulation of O2-and H2O2 leads to cell membrane lipid peroxidation, causing membrane damage and leakage of electrolytes. For examples, cold stress enhanced the production of malonic dialehyde (MDA) and relative electrolyte leakage in jasmine leaves, confirming the presence of oxidative stress [2]. In addition, H2O2 is subsequently converted into hydroxyl radical (HO·), which is a highly reactive oxidant in the family of ROS [29].…”

“…The sources of Pb include soldering, battery manufacturing, rubber and plastics industries, additive agent in fuel, as well as a pigment and drying agent in primer, paints and inks [1]. Then, Pb moves from the environment and enters the human body via food ingestion (65%), water (20%) and air (15%) [2,3]. Pb cannot be degraded, it is highly persistent and tends to enter the plants.…”

“…Due to its zwitterionic and high hydrophilic character, proline may act as protein stabilizer, metal chelator, free radical scavenger and provide protection to the enzyme and biomolecules [29]. SA pre-treatment decrease the oxidative stress accumulation in rice roots and seedlings grown under Cd, Mn and Pb stress [33,34], Triticum polonicum L. grown under manganese (Mn) toxicity [35], and jasmine leaves in cold stress [2]. In this study, SA treatment managed to mitigate the oxidative stress in Pbtreated N. tabacum.…”

Phenotypic Plasticity of Spineless Safflower (Carthamus tinctorius L.) Cultivars in Response to Exogenous Application of Salicylic Acid under Rainfed Climate Conditions

“…Stomata closure, transportation, and ion uptake. Several studies carried out under laboratory and field conditions strongly suggested that salicylic acid plays an essential role in many biological responses in plants (Cai et al, 2015), especially the defense mechanism against biotic and abiotic stresses, which are responsible for poor plant growth and yield quality. Salicylic acid is held responsible for the endogenous signal used to maintain membrane integrity and mediating the hypersensitive systematic resistance against pathogen and disease attacks (Afzal et al, 1560;Baghizadeh, 2011;Gupta et al, 2013).…”